Tuning a parameter with cross-validation

This example presents a nested cross-validation (CV) approach to perform hyperparameter tuning and model performance evaluation with Decoder objects.

The Decoder is a composite estimator that:

1. Applies a masker to the input images

2. Performs ANOVA univariate feature selection

3. Fits a classifier to the preprocessed data.

More information about the inner workings of the Decoder class can be found at this page.

The Decoder class implements a model selection scheme that averages the best models within a cross-validation loop (a technique sometimes known as CV bagging). However, there is no built-in way to tune hyperparameters related to feature selection: this has to be done manually using the nested cross-validation method, where the inner CV loop is used to tune hyperparameters and the outer CV loop is used to evaluate model performance. See https://scikit-learn.org/stable/modules/cross_validation.html for an excellent explanation of how cross-validation works.

import warnings

warnings.filterwarnings(
    "ignore", message="The provided image has no sform in its header."
)

# set overall verbosity for this example
verbose = 0

Load the Haxby dataset

We start by loading fMRI data and target labels from the Haxby dataset.

import pandas as pd

from nilearn import datasets
from nilearn.image import index_img

# load data from a single subject
haxby_dataset = datasets.fetch_haxby(verbose=verbose)
fmri_img = haxby_dataset.func[0]
mask_img = haxby_dataset.mask

print(f"Mask nifti image (3D) is located at: {haxby_dataset.mask}")
print(f"Functional nifti image (4D) are located at: {haxby_dataset.func[0]}")

# Load the behavioral data
labels = pd.read_csv(haxby_dataset.session_target[0], sep=" ")
y = labels["labels"]

# Keep only data corresponding to shoes or bottles
condition_mask = y.isin(["shoe", "bottle"])
fmri_niimgs = index_img(fmri_img, condition_mask)
y = y[condition_mask]
runs = labels["chunks"][condition_mask]  # 12 runs total

Mask nifti image (3D) is located at: /home/runner/nilearn_data/haxby2001/mask.nii.gz
Functional nifti image (4D) are located at: /home/runner/nilearn_data/haxby2001/subj2/bold.nii.gz

Tuning the screening_percentile parameter

The rest of this example will consist of a step-by-step walkthrough of how to tune a feature selection hyperparameter, screening_percentile. For the full nested cross-validation (best practice) approach, see the end of this page.

Helper function

Let’s define a helper function that creates and fits a single instance of a Decoder with a given value of the screening_percentile parameter. This function will allow us to avoid duplication of the code since we only want to vary the screening_percentile hyperparameter.

import warnings

from nilearn.decoding import Decoder


def fit_decoder(X, y, screening_percentile, verbose=0):
    decoder = Decoder(
        estimator="svc",
        cv=3,
        mask=mask_img,  # previously loaded, same for all decoders
        smoothing_fwhm=4,
        screening_percentile=screening_percentile,
        verbose=verbose,
    )
    decoder.fit(X, y)
    return decoder

Trying different values of the screening_percentile hyperparameter

Here we fit the decoder on a subset of the data (the first 10 runs) using different values for the screening_percentile parameter. We can see which screening percentile gives the best validation score.

screening_percentiles = [2, 4, 8, 16, 32, 64]

idx_train = runs < 10  # first 10 runs
idx_val = ~idx_train  # remaining 2 runs

X_train = index_img(fmri_niimgs, idx_train)
y_train = y[idx_train]
X_val = index_img(fmri_niimgs, idx_val)
y_val = y[idx_val]

validation_scores = {}  # {screening_percentile: validation_score}
for screening_percentile in screening_percentiles:
    decoder = fit_decoder(
        X_train,
        y_train,
        screening_percentile=screening_percentile,
        verbose=verbose,
    )
    validation_scores[screening_percentile] = decoder.score(X_val, y_val)

print("\nValidation scores:")
for screening_percentile, val_score in validation_scores.items():
    print(f"- {screening_percentile=}: {val_score:.4f}")

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    71   127   152  3710  9201  9343 10661 13045 13993 14764 23573] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [660] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    71   127   152  3710  9201  9343 10661 13045 13993 14764 23573] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [660] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    71   127   152  3710  9201  9343 10661 13045 13993 14764 23573] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [660] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    71   127   152  3710  9201  9343 10661 13045 13993 14764 23573] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [660] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    71   127   152  3710  9201  9343 10661 13045 13993 14764 23573] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [660] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    71   127   152  3710  9201  9343 10661 13045 13993 14764 23573] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [660] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide


Validation scores:
- screening_percentile=2: 0.4105
- screening_percentile=4: 0.4846
- screening_percentile=8: 0.4352
- screening_percentile=16: 0.5123
- screening_percentile=32: 0.5401
- screening_percentile=64: 0.4969

The above block of code can help determine which screening percentile is optimal when the decoder is fitted and validated on specific data. However, there are some important caveats to note:

1. The above code use a single train-test split. Different splits will give different validation scores, and it is possible that the best screening percentile is different for different splits.

2. The validation score should not be used as an estimate of the generalization performance of the model, since validation data was used to select the best screening percentile (in other words, it is not truly held-out data).

These points are addressed by using nested cross-validation.

Full nested cross-validation

Nested cross-validation works as follows:

1. The inner CV loop is used for hyperparameter tuning. Multiple validation scores are obtained for each value of the hyperparameter, and the best value is selected based on the average validation score across folds. Note: this is similar in concept to sklearn’s GridSearchCV, which cannot be used here because of input data incompatibility between the Decoder class and other sklearn estimators.

2. The outer CV loop is used for model evaluation. For each fold, the model is refit using the best hyperparameter value from the inner CV loop, and a test score is obtained on the left-out test set. We then report the average test score across folds as an estimate of the generalization performance of the model.

   In addition, we plot the average validation scores across inner CV folds for each value of the hyperparameter. This can help us visualize the hyperparameter tuning process and the stability of the best hyperparameter value across different outer CV folds.

import matplotlib.pyplot as plt
import numpy as np
from sklearn.model_selection import GroupKFold

plt.figure(figsize=(6, 4))
plt.xticks(np.arange(len(screening_percentiles)), screening_percentiles)
plt.xlabel("ANOVA screening percentile")
plt.ylabel("Average validation score across inner CV folds")

outer_cv = GroupKFold(n_splits=3)
test_scores = []

# outer CV loop for model evaluation
# the test set here are left out from the entire model fitting and
# selection process
for idx_train_val, idx_test in outer_cv.split(
    np.arange(len(runs)), groups=runs
):
    # inner CV loop for hyperparameter tuning
    # the train set is used to fit the model and the validation set is used to
    # select the best screening percentile for this CV split
    mean_val_scores = {}
    for screening_percentile in screening_percentiles:
        inner_cv = GroupKFold(n_splits=3)
        val_scores = []
        for idx_train, idx_val in inner_cv.split(
            idx_train_val, groups=runs.iloc[idx_train_val]
        ):
            # inner_cv.split() returns indices relative to idx_train_val, so we
            # need to index into idx_train_val to get the actual indices for
            # the train and validation sets
            idx_train = idx_train_val[idx_train]
            idx_val = idx_train_val[idx_val]

            X_train = index_img(fmri_niimgs, idx_train)
            y_train = y.iloc[idx_train]
            X_val = index_img(fmri_niimgs, idx_val)
            y_val = y.iloc[idx_val]

            decoder = fit_decoder(
                X_train,
                y_train,
                screening_percentile=screening_percentile,
                verbose=verbose,
            )
            val_scores.append(decoder.score(X_val, y_val))

        mean_val_scores[screening_percentile] = np.mean(val_scores)

    best_screening_percentile = max(mean_val_scores, key=mean_val_scores.get)

    # plot average validation score for each screening percentile value
    # use a different marker shape for the best screening percentile
    i_fold = len(test_scores)
    color = f"C{i_fold}"
    plt.scatter(
        np.arange(len(screening_percentiles)),
        mean_val_scores.values(),
        c=[
            color
            if screening_percentile != best_screening_percentile
            else "white"
            for screening_percentile in screening_percentiles
        ],
        label=f"Outer CV fold {i_fold + 1}",
    )
    plt.scatter(
        screening_percentiles.index(best_screening_percentile),
        mean_val_scores[best_screening_percentile],
        c=color,
        s=100,
        marker="*",
    )

    # pick the best screening percentile from the inner CV loop
    print("Average validation scores by screening percentile:")
    for screening_percentile, score in mean_val_scores.items():
        str_best = ""
        if screening_percentile == best_screening_percentile:
            str_best = " (best)"
        print(f"{screening_percentile=}:\t{score:.4f}{str_best}")

    # refit the model and evaluate on the test set
    X_train_val = index_img(fmri_niimgs, idx_train_val)
    y_train_val = y.iloc[idx_train_val]
    X_test = index_img(fmri_niimgs, idx_test)
    y_test = y.iloc[idx_test]

    decoder = fit_decoder(
        X_train_val,
        y_train_val,
        screening_percentile=best_screening_percentile,
        verbose=verbose,
    )
    test_scores.append(decoder.score(X_test, y_test))

plt.legend()

# final model performance estimation
print(
    "Mean ± std test score:\t"
    f"{np.mean(test_scores):.4f} ± {np.std(test_scores):.4f}"
)

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   724   969  1225  1494  1962  1990  2851  2866  3710  3711  3726
  5696  5697  6066  9201  9208  9844 10191 10417 10485 11683 11793 11799
 12310 12693 12710 13114 13993 14060 14151 14341 14362 15754 16521 16737
 18328 18782 20619 20933 21261 21398 21433 21434 22501 22819 23573 24618
 24660 24700 24701 25588 25770 26104 26105 26144 27184 27619 27626 27661
 27932 28497 29472 29758 29829 29837 30276 33358 33392 33394 33745 34014
 34497 34738 35771 36511 37315 37352 37986 37995 38006 38032 38117 38463
 38981 38992 39047] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    67   152   163   169   344   969  1225  1456  1476  2983  4317
  6352  9347 10661 12117 14662 23323 23843 32893 36774 38501 38867 39412
 39444 39501 39584 39640] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [10920 12859 31755] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    1     4     5     6    22    33    48    52    71    77    86   127
   152   161   162   163   168   173   174   518   538   539   580   685
   948  1340  1494  2855  2864  3203  3491  3710  3711  5104  5697  5888
  5922  5959  6606  6670  6672  7772  7790  7814  7815  7827  7877  8200
  8203  8424  8468  8506  8805  8816  8842  9058  9139  9153  9195  9201
  9243  9342  9343  9374  9377  9445  9447 10204 10251 10417 10424 10438
 10447 10625 10626 10657 10661 10694 10733 10770 10809 10812 10844 11420
 11428 11694 11710 11717 11730 11933 11968 12047 12541 12938 13004 13045
 13058 13068 13114 13281 13942 13993 14016 14060 14106 14151 14308 14341
 14430 14482 14489 15829 15835 16932 17236 17261 17283 17964 18610 18669
 18691 19066 19593 19868 19891 19897 20045 20057 20808 21261 21377 21398
 21403 21417 21424 21429 21449 21460 22154 22648 22723 22810 22815 22818
 22846 22861 23322 23573 23775 24047 24059 24076 24191 24192 24193 24203
 24221 24655 24697 24906 25145 25215 25488 25536 25551 25580 25586 25587
 25593 25600 25798 26105 26287 26430 26914 26941 26947 27111 27144 27178
 27290 27328 28214 28491 28528 28565 28959 29117 29154 29450 29725 30749
 31312 31616 36927 38006 38032 39134] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  262  1925 21080 21081 29000] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   724   969  1225  1494  1962  1990  2851  2866  3710  3711  3726
  5696  5697  6066  9201  9208  9844 10191 10417 10485 11683 11793 11799
 12310 12693 12710 13114 13993 14060 14151 14341 14362 15754 16521 16737
 18328 18782 20619 20933 21261 21398 21433 21434 22501 22819 23573 24618
 24660 24700 24701 25588 25770 26104 26105 26144 27184 27619 27626 27661
 27932 28497 29472 29758 29829 29837 30276 33358 33392 33394 33745 34014
 34497 34738 35771 36511 37315 37352 37986 37995 38006 38032 38117 38463
 38981 38992 39047] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    67   152   163   169   344   969  1225  1456  1476  2983  4317
  6352  9347 10661 12117 14662 23323 23843 32893 36774 38501 38867 39412
 39444 39501 39584 39640] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [10920 12859 31755] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    1     4     5     6    22    33    48    52    71    77    86   127
   152   161   162   163   168   173   174   518   538   539   580   685
   948  1340  1494  2855  2864  3203  3491  3710  3711  5104  5697  5888
  5922  5959  6606  6670  6672  7772  7790  7814  7815  7827  7877  8200
  8203  8424  8468  8506  8805  8816  8842  9058  9139  9153  9195  9201
  9243  9342  9343  9374  9377  9445  9447 10204 10251 10417 10424 10438
 10447 10625 10626 10657 10661 10694 10733 10770 10809 10812 10844 11420
 11428 11694 11710 11717 11730 11933 11968 12047 12541 12938 13004 13045
 13058 13068 13114 13281 13942 13993 14016 14060 14106 14151 14308 14341
 14430 14482 14489 15829 15835 16932 17236 17261 17283 17964 18610 18669
 18691 19066 19593 19868 19891 19897 20045 20057 20808 21261 21377 21398
 21403 21417 21424 21429 21449 21460 22154 22648 22723 22810 22815 22818
 22846 22861 23322 23573 23775 24047 24059 24076 24191 24192 24193 24203
 24221 24655 24697 24906 25145 25215 25488 25536 25551 25580 25586 25587
 25593 25600 25798 26105 26287 26430 26914 26941 26947 27111 27144 27178
 27290 27328 28214 28491 28528 28565 28959 29117 29154 29450 29725 30749
 31312 31616 36927 38006 38032 39134] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  262  1925 21080 21081 29000] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   724   969  1225  1494  1962  1990  2851  2866  3710  3711  3726
  5696  5697  6066  9201  9208  9844 10191 10417 10485 11683 11793 11799
 12310 12693 12710 13114 13993 14060 14151 14341 14362 15754 16521 16737
 18328 18782 20619 20933 21261 21398 21433 21434 22501 22819 23573 24618
 24660 24700 24701 25588 25770 26104 26105 26144 27184 27619 27626 27661
 27932 28497 29472 29758 29829 29837 30276 33358 33392 33394 33745 34014
 34497 34738 35771 36511 37315 37352 37986 37995 38006 38032 38117 38463
 38981 38992 39047] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    67   152   163   169   344   969  1225  1456  1476  2983  4317
  6352  9347 10661 12117 14662 23323 23843 32893 36774 38501 38867 39412
 39444 39501 39584 39640] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [10920 12859 31755] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    1     4     5     6    22    33    48    52    71    77    86   127
   152   161   162   163   168   173   174   518   538   539   580   685
   948  1340  1494  2855  2864  3203  3491  3710  3711  5104  5697  5888
  5922  5959  6606  6670  6672  7772  7790  7814  7815  7827  7877  8200
  8203  8424  8468  8506  8805  8816  8842  9058  9139  9153  9195  9201
  9243  9342  9343  9374  9377  9445  9447 10204 10251 10417 10424 10438
 10447 10625 10626 10657 10661 10694 10733 10770 10809 10812 10844 11420
 11428 11694 11710 11717 11730 11933 11968 12047 12541 12938 13004 13045
 13058 13068 13114 13281 13942 13993 14016 14060 14106 14151 14308 14341
 14430 14482 14489 15829 15835 16932 17236 17261 17283 17964 18610 18669
 18691 19066 19593 19868 19891 19897 20045 20057 20808 21261 21377 21398
 21403 21417 21424 21429 21449 21460 22154 22648 22723 22810 22815 22818
 22846 22861 23322 23573 23775 24047 24059 24076 24191 24192 24193 24203
 24221 24655 24697 24906 25145 25215 25488 25536 25551 25580 25586 25587
 25593 25600 25798 26105 26287 26430 26914 26941 26947 27111 27144 27178
 27290 27328 28214 28491 28528 28565 28959 29117 29154 29450 29725 30749
 31312 31616 36927 38006 38032 39134] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  262  1925 21080 21081 29000] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   724   969  1225  1494  1962  1990  2851  2866  3710  3711  3726
  5696  5697  6066  9201  9208  9844 10191 10417 10485 11683 11793 11799
 12310 12693 12710 13114 13993 14060 14151 14341 14362 15754 16521 16737
 18328 18782 20619 20933 21261 21398 21433 21434 22501 22819 23573 24618
 24660 24700 24701 25588 25770 26104 26105 26144 27184 27619 27626 27661
 27932 28497 29472 29758 29829 29837 30276 33358 33392 33394 33745 34014
 34497 34738 35771 36511 37315 37352 37986 37995 38006 38032 38117 38463
 38981 38992 39047] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    67   152   163   169   344   969  1225  1456  1476  2983  4317
  6352  9347 10661 12117 14662 23323 23843 32893 36774 38501 38867 39412
 39444 39501 39584 39640] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [10920 12859 31755] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    1     4     5     6    22    33    48    52    71    77    86   127
   152   161   162   163   168   173   174   518   538   539   580   685
   948  1340  1494  2855  2864  3203  3491  3710  3711  5104  5697  5888
  5922  5959  6606  6670  6672  7772  7790  7814  7815  7827  7877  8200
  8203  8424  8468  8506  8805  8816  8842  9058  9139  9153  9195  9201
  9243  9342  9343  9374  9377  9445  9447 10204 10251 10417 10424 10438
 10447 10625 10626 10657 10661 10694 10733 10770 10809 10812 10844 11420
 11428 11694 11710 11717 11730 11933 11968 12047 12541 12938 13004 13045
 13058 13068 13114 13281 13942 13993 14016 14060 14106 14151 14308 14341
 14430 14482 14489 15829 15835 16932 17236 17261 17283 17964 18610 18669
 18691 19066 19593 19868 19891 19897 20045 20057 20808 21261 21377 21398
 21403 21417 21424 21429 21449 21460 22154 22648 22723 22810 22815 22818
 22846 22861 23322 23573 23775 24047 24059 24076 24191 24192 24193 24203
 24221 24655 24697 24906 25145 25215 25488 25536 25551 25580 25586 25587
 25593 25600 25798 26105 26287 26430 26914 26941 26947 27111 27144 27178
 27290 27328 28214 28491 28528 28565 28959 29117 29154 29450 29725 30749
 31312 31616 36927 38006 38032 39134] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  262  1925 21080 21081 29000] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   724   969  1225  1494  1962  1990  2851  2866  3710  3711  3726
  5696  5697  6066  9201  9208  9844 10191 10417 10485 11683 11793 11799
 12310 12693 12710 13114 13993 14060 14151 14341 14362 15754 16521 16737
 18328 18782 20619 20933 21261 21398 21433 21434 22501 22819 23573 24618
 24660 24700 24701 25588 25770 26104 26105 26144 27184 27619 27626 27661
 27932 28497 29472 29758 29829 29837 30276 33358 33392 33394 33745 34014
 34497 34738 35771 36511 37315 37352 37986 37995 38006 38032 38117 38463
 38981 38992 39047] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    67   152   163   169   344   969  1225  1456  1476  2983  4317
  6352  9347 10661 12117 14662 23323 23843 32893 36774 38501 38867 39412
 39444 39501 39584 39640] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [10920 12859 31755] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    1     4     5     6    22    33    48    52    71    77    86   127
   152   161   162   163   168   173   174   518   538   539   580   685
   948  1340  1494  2855  2864  3203  3491  3710  3711  5104  5697  5888
  5922  5959  6606  6670  6672  7772  7790  7814  7815  7827  7877  8200
  8203  8424  8468  8506  8805  8816  8842  9058  9139  9153  9195  9201
  9243  9342  9343  9374  9377  9445  9447 10204 10251 10417 10424 10438
 10447 10625 10626 10657 10661 10694 10733 10770 10809 10812 10844 11420
 11428 11694 11710 11717 11730 11933 11968 12047 12541 12938 13004 13045
 13058 13068 13114 13281 13942 13993 14016 14060 14106 14151 14308 14341
 14430 14482 14489 15829 15835 16932 17236 17261 17283 17964 18610 18669
 18691 19066 19593 19868 19891 19897 20045 20057 20808 21261 21377 21398
 21403 21417 21424 21429 21449 21460 22154 22648 22723 22810 22815 22818
 22846 22861 23322 23573 23775 24047 24059 24076 24191 24192 24193 24203
 24221 24655 24697 24906 25145 25215 25488 25536 25551 25580 25586 25587
 25593 25600 25798 26105 26287 26430 26914 26941 26947 27111 27144 27178
 27290 27328 28214 28491 28528 28565 28959 29117 29154 29450 29725 30749
 31312 31616 36927 38006 38032 39134] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  262  1925 21080 21081 29000] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   724   969  1225  1494  1962  1990  2851  2866  3710  3711  3726
  5696  5697  6066  9201  9208  9844 10191 10417 10485 11683 11793 11799
 12310 12693 12710 13114 13993 14060 14151 14341 14362 15754 16521 16737
 18328 18782 20619 20933 21261 21398 21433 21434 22501 22819 23573 24618
 24660 24700 24701 25588 25770 26104 26105 26144 27184 27619 27626 27661
 27932 28497 29472 29758 29829 29837 30276 33358 33392 33394 33745 34014
 34497 34738 35771 36511 37315 37352 37986 37995 38006 38032 38117 38463
 38981 38992 39047] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    67   152   163   169   344   969  1225  1456  1476  2983  4317
  6352  9347 10661 12117 14662 23323 23843 32893 36774 38501 38867 39412
 39444 39501 39584 39640] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [10920 12859 31755] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    1     4     5     6    22    33    48    52    71    77    86   127
   152   161   162   163   168   173   174   518   538   539   580   685
   948  1340  1494  2855  2864  3203  3491  3710  3711  5104  5697  5888
  5922  5959  6606  6670  6672  7772  7790  7814  7815  7827  7877  8200
  8203  8424  8468  8506  8805  8816  8842  9058  9139  9153  9195  9201
  9243  9342  9343  9374  9377  9445  9447 10204 10251 10417 10424 10438
 10447 10625 10626 10657 10661 10694 10733 10770 10809 10812 10844 11420
 11428 11694 11710 11717 11730 11933 11968 12047 12541 12938 13004 13045
 13058 13068 13114 13281 13942 13993 14016 14060 14106 14151 14308 14341
 14430 14482 14489 15829 15835 16932 17236 17261 17283 17964 18610 18669
 18691 19066 19593 19868 19891 19897 20045 20057 20808 21261 21377 21398
 21403 21417 21424 21429 21449 21460 22154 22648 22723 22810 22815 22818
 22846 22861 23322 23573 23775 24047 24059 24076 24191 24192 24193 24203
 24221 24655 24697 24906 25145 25215 25488 25536 25551 25580 25586 25587
 25593 25600 25798 26105 26287 26430 26914 26941 26947 27111 27144 27178
 27290 27328 28214 28491 28528 28565 28959 29117 29154 29450 29725 30749
 31312 31616 36927 38006 38032 39134] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  262  1925 21080 21081 29000] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

Average validation scores by screening percentile:
screening_percentile=2: 0.5569
screening_percentile=4: 0.5690
screening_percentile=8: 0.5796
screening_percentile=16:        0.5830 (best)
screening_percentile=32:        0.5704
screening_percentile=64:        0.5737
/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   52    71   127   152   580   969  1225  1494  3710  3711  7815  9201
 10661 13045 13114 13993 14151 14341 17964 18782 21403 23573 26105 27111
 27184 36927 37995 38006] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [12859] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    20    71    77    93   152   163   169   518   580   664   705
   723   724   948   962  1113  1317  1493  1494  1510  1990  2864  3710
  3711  3726  5424  5487  5560  5696  5697  6178  7401  7815  7920  9198
  9800 10097 10191 11399 11799 12154 12678 12891 12938 13045 13902 13993
 14025 14049 14918 15284 15327 15587 15739 16520 17290 18118 18157 18465
 18578 18782 19447 19593 19628 19629 19891 20933 20952 21022 21261 21433
 23573 23938 24618 24658 24697 24736 25182 25798 25992 26064 26145 27111
 27619 27626 27661 27932 28238 28394 28959 29117 29765 29792 29829 30276
 31021 31057 31195 31232 31499 32116 32117 32156 32158 32192 32227 32594
 33254 33294 33324 33745 34738 36278 36932 37070 37226 37315 37385 37620
 37995 38208 38520 38521 38690 38827 38867 39054 39168 39481] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [6140] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   13   152   163   169  1442  8131  8166  9343  9375 10661 39707] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3     4     5    22    33    47    48    50    52    61    62    63
    66    71    75    76    77    78    86    89    90    91    92    93
    95    99   103   104   105   106   107   108   114   115   117   118
   119   120   121   122   124   127   128   129   130   131   132   133
   134   135   137   142   143   144   145   146   147   152   153   154
   155   156   157   158   159   160   161   162   163   164   165   167
   168   169   170   171   172   173   174   518   538   539   580   685
   962  1315  1337  1340  1493  1494  2136  2863  3491  3710  3711  4496
  5036  5562  5623  5696  5697  6625  7206  7827  7877  7965  7987  8131
  8203  8424  8468  8506  8842  8875  8947  8986  8988  9201  9243  9342
  9343  9374  9375  9377  9411 10040 10100 10204 10246 10384 10402 10417
 10424 10447 10496 10625 10626 10657 10661 10694 10733 10770 10809 10811
 11428 11521 11532 11604 11694 11710 11725 11792 11850 11935 12915 12938
 12950 13045 13058 13114 13281 13427 13622 13791 13831 13942 13993 14012
 14049 14151 14200 14284 14406 14524 14600 14764 14844 14929 14962 15722
 15835 15943 16025 16087 16096 16713 16932 17080 17087 17103 17125 17127
 17149 17206 17236 17261 17268 17290 17403 17405 17464 17638 17641 17676
 18051 18157 18269 18465 18540 18559 18615 18630 18669 18677 18782 18846
 19203 19593 19732 19868 19897 20364 20849 20933 20935 20952 20986 21022
 21182 21207 21261 21290 21357 21358 21366 21379 21398 21417 21432 21460
 21864 22066 22236 22648 22699 22700 22723 22744 22810 22815 22818 22846
 22861 23243 23246 23322 23573 23848 24000 24076 24191 24192 24221 24655
 24658 24697 25145 25215 25305 25488 25528 25558 25574 25578 25580 25586
 25631 25766 25798 26064 26065 26105 26145 26314 26773 26914 26941 26947
 26964 27111 27290 27292 27293 27586 27622 27661 27841 28118 28214 28345
 28395 28490 28491 28526 28527 28528 28565 28959 29117 29450 29723 29725
 29758 29793 29829 30276 30525 30830 30837 30886 30944 30979 31019 31312
 31320 31585 31616 32006 32116 32127 32183 32218 32439 32525 32804 33349
 33745 33864 34024 34084 34738 35135 35912 35999 36511 36666 36799 36854
 37041 37198 37261 37315 37782 37995 38055 38169 38314 38338 38563 38603
 38637 38641 38690 38754 38867 38883 39008 39134 39156 39168 39214 39303
 39339 39405 39490 39491 39517 39534 39704 39723 39832 39833 39845 39846
 39858 39859 39860 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [32088] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    20    71    77    93   152   163   169   518   580   664   705
   723   724   948   962  1113  1317  1493  1494  1510  1990  2864  3710
  3711  3726  5424  5487  5560  5696  5697  6178  7401  7815  7920  9198
  9800 10097 10191 11399 11799 12154 12678 12891 12938 13045 13902 13993
 14025 14049 14918 15284 15327 15587 15739 16520 17290 18118 18157 18465
 18578 18782 19447 19593 19628 19629 19891 20933 20952 21022 21261 21433
 23573 23938 24618 24658 24697 24736 25182 25798 25992 26064 26145 27111
 27619 27626 27661 27932 28238 28394 28959 29117 29765 29792 29829 30276
 31021 31057 31195 31232 31499 32116 32117 32156 32158 32192 32227 32594
 33254 33294 33324 33745 34738 36278 36932 37070 37226 37315 37385 37620
 37995 38208 38520 38521 38690 38827 38867 39054 39168 39481] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [6140] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   13   152   163   169  1442  8131  8166  9343  9375 10661 39707] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3     4     5    22    33    47    48    50    52    61    62    63
    66    71    75    76    77    78    86    89    90    91    92    93
    95    99   103   104   105   106   107   108   114   115   117   118
   119   120   121   122   124   127   128   129   130   131   132   133
   134   135   137   142   143   144   145   146   147   152   153   154
   155   156   157   158   159   160   161   162   163   164   165   167
   168   169   170   171   172   173   174   518   538   539   580   685
   962  1315  1337  1340  1493  1494  2136  2863  3491  3710  3711  4496
  5036  5562  5623  5696  5697  6625  7206  7827  7877  7965  7987  8131
  8203  8424  8468  8506  8842  8875  8947  8986  8988  9201  9243  9342
  9343  9374  9375  9377  9411 10040 10100 10204 10246 10384 10402 10417
 10424 10447 10496 10625 10626 10657 10661 10694 10733 10770 10809 10811
 11428 11521 11532 11604 11694 11710 11725 11792 11850 11935 12915 12938
 12950 13045 13058 13114 13281 13427 13622 13791 13831 13942 13993 14012
 14049 14151 14200 14284 14406 14524 14600 14764 14844 14929 14962 15722
 15835 15943 16025 16087 16096 16713 16932 17080 17087 17103 17125 17127
 17149 17206 17236 17261 17268 17290 17403 17405 17464 17638 17641 17676
 18051 18157 18269 18465 18540 18559 18615 18630 18669 18677 18782 18846
 19203 19593 19732 19868 19897 20364 20849 20933 20935 20952 20986 21022
 21182 21207 21261 21290 21357 21358 21366 21379 21398 21417 21432 21460
 21864 22066 22236 22648 22699 22700 22723 22744 22810 22815 22818 22846
 22861 23243 23246 23322 23573 23848 24000 24076 24191 24192 24221 24655
 24658 24697 25145 25215 25305 25488 25528 25558 25574 25578 25580 25586
 25631 25766 25798 26064 26065 26105 26145 26314 26773 26914 26941 26947
 26964 27111 27290 27292 27293 27586 27622 27661 27841 28118 28214 28345
 28395 28490 28491 28526 28527 28528 28565 28959 29117 29450 29723 29725
 29758 29793 29829 30276 30525 30830 30837 30886 30944 30979 31019 31312
 31320 31585 31616 32006 32116 32127 32183 32218 32439 32525 32804 33349
 33745 33864 34024 34084 34738 35135 35912 35999 36511 36666 36799 36854
 37041 37198 37261 37315 37782 37995 38055 38169 38314 38338 38563 38603
 38637 38641 38690 38754 38867 38883 39008 39134 39156 39168 39214 39303
 39339 39405 39490 39491 39517 39534 39704 39723 39832 39833 39845 39846
 39858 39859 39860 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [32088] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    20    71    77    93   152   163   169   518   580   664   705
   723   724   948   962  1113  1317  1493  1494  1510  1990  2864  3710
  3711  3726  5424  5487  5560  5696  5697  6178  7401  7815  7920  9198
  9800 10097 10191 11399 11799 12154 12678 12891 12938 13045 13902 13993
 14025 14049 14918 15284 15327 15587 15739 16520 17290 18118 18157 18465
 18578 18782 19447 19593 19628 19629 19891 20933 20952 21022 21261 21433
 23573 23938 24618 24658 24697 24736 25182 25798 25992 26064 26145 27111
 27619 27626 27661 27932 28238 28394 28959 29117 29765 29792 29829 30276
 31021 31057 31195 31232 31499 32116 32117 32156 32158 32192 32227 32594
 33254 33294 33324 33745 34738 36278 36932 37070 37226 37315 37385 37620
 37995 38208 38520 38521 38690 38827 38867 39054 39168 39481] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [6140] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   13   152   163   169  1442  8131  8166  9343  9375 10661 39707] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3     4     5    22    33    47    48    50    52    61    62    63
    66    71    75    76    77    78    86    89    90    91    92    93
    95    99   103   104   105   106   107   108   114   115   117   118
   119   120   121   122   124   127   128   129   130   131   132   133
   134   135   137   142   143   144   145   146   147   152   153   154
   155   156   157   158   159   160   161   162   163   164   165   167
   168   169   170   171   172   173   174   518   538   539   580   685
   962  1315  1337  1340  1493  1494  2136  2863  3491  3710  3711  4496
  5036  5562  5623  5696  5697  6625  7206  7827  7877  7965  7987  8131
  8203  8424  8468  8506  8842  8875  8947  8986  8988  9201  9243  9342
  9343  9374  9375  9377  9411 10040 10100 10204 10246 10384 10402 10417
 10424 10447 10496 10625 10626 10657 10661 10694 10733 10770 10809 10811
 11428 11521 11532 11604 11694 11710 11725 11792 11850 11935 12915 12938
 12950 13045 13058 13114 13281 13427 13622 13791 13831 13942 13993 14012
 14049 14151 14200 14284 14406 14524 14600 14764 14844 14929 14962 15722
 15835 15943 16025 16087 16096 16713 16932 17080 17087 17103 17125 17127
 17149 17206 17236 17261 17268 17290 17403 17405 17464 17638 17641 17676
 18051 18157 18269 18465 18540 18559 18615 18630 18669 18677 18782 18846
 19203 19593 19732 19868 19897 20364 20849 20933 20935 20952 20986 21022
 21182 21207 21261 21290 21357 21358 21366 21379 21398 21417 21432 21460
 21864 22066 22236 22648 22699 22700 22723 22744 22810 22815 22818 22846
 22861 23243 23246 23322 23573 23848 24000 24076 24191 24192 24221 24655
 24658 24697 25145 25215 25305 25488 25528 25558 25574 25578 25580 25586
 25631 25766 25798 26064 26065 26105 26145 26314 26773 26914 26941 26947
 26964 27111 27290 27292 27293 27586 27622 27661 27841 28118 28214 28345
 28395 28490 28491 28526 28527 28528 28565 28959 29117 29450 29723 29725
 29758 29793 29829 30276 30525 30830 30837 30886 30944 30979 31019 31312
 31320 31585 31616 32006 32116 32127 32183 32218 32439 32525 32804 33349
 33745 33864 34024 34084 34738 35135 35912 35999 36511 36666 36799 36854
 37041 37198 37261 37315 37782 37995 38055 38169 38314 38338 38563 38603
 38637 38641 38690 38754 38867 38883 39008 39134 39156 39168 39214 39303
 39339 39405 39490 39491 39517 39534 39704 39723 39832 39833 39845 39846
 39858 39859 39860 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [32088] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    20    71    77    93   152   163   169   518   580   664   705
   723   724   948   962  1113  1317  1493  1494  1510  1990  2864  3710
  3711  3726  5424  5487  5560  5696  5697  6178  7401  7815  7920  9198
  9800 10097 10191 11399 11799 12154 12678 12891 12938 13045 13902 13993
 14025 14049 14918 15284 15327 15587 15739 16520 17290 18118 18157 18465
 18578 18782 19447 19593 19628 19629 19891 20933 20952 21022 21261 21433
 23573 23938 24618 24658 24697 24736 25182 25798 25992 26064 26145 27111
 27619 27626 27661 27932 28238 28394 28959 29117 29765 29792 29829 30276
 31021 31057 31195 31232 31499 32116 32117 32156 32158 32192 32227 32594
 33254 33294 33324 33745 34738 36278 36932 37070 37226 37315 37385 37620
 37995 38208 38520 38521 38690 38827 38867 39054 39168 39481] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [6140] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   13   152   163   169  1442  8131  8166  9343  9375 10661 39707] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3     4     5    22    33    47    48    50    52    61    62    63
    66    71    75    76    77    78    86    89    90    91    92    93
    95    99   103   104   105   106   107   108   114   115   117   118
   119   120   121   122   124   127   128   129   130   131   132   133
   134   135   137   142   143   144   145   146   147   152   153   154
   155   156   157   158   159   160   161   162   163   164   165   167
   168   169   170   171   172   173   174   518   538   539   580   685
   962  1315  1337  1340  1493  1494  2136  2863  3491  3710  3711  4496
  5036  5562  5623  5696  5697  6625  7206  7827  7877  7965  7987  8131
  8203  8424  8468  8506  8842  8875  8947  8986  8988  9201  9243  9342
  9343  9374  9375  9377  9411 10040 10100 10204 10246 10384 10402 10417
 10424 10447 10496 10625 10626 10657 10661 10694 10733 10770 10809 10811
 11428 11521 11532 11604 11694 11710 11725 11792 11850 11935 12915 12938
 12950 13045 13058 13114 13281 13427 13622 13791 13831 13942 13993 14012
 14049 14151 14200 14284 14406 14524 14600 14764 14844 14929 14962 15722
 15835 15943 16025 16087 16096 16713 16932 17080 17087 17103 17125 17127
 17149 17206 17236 17261 17268 17290 17403 17405 17464 17638 17641 17676
 18051 18157 18269 18465 18540 18559 18615 18630 18669 18677 18782 18846
 19203 19593 19732 19868 19897 20364 20849 20933 20935 20952 20986 21022
 21182 21207 21261 21290 21357 21358 21366 21379 21398 21417 21432 21460
 21864 22066 22236 22648 22699 22700 22723 22744 22810 22815 22818 22846
 22861 23243 23246 23322 23573 23848 24000 24076 24191 24192 24221 24655
 24658 24697 25145 25215 25305 25488 25528 25558 25574 25578 25580 25586
 25631 25766 25798 26064 26065 26105 26145 26314 26773 26914 26941 26947
 26964 27111 27290 27292 27293 27586 27622 27661 27841 28118 28214 28345
 28395 28490 28491 28526 28527 28528 28565 28959 29117 29450 29723 29725
 29758 29793 29829 30276 30525 30830 30837 30886 30944 30979 31019 31312
 31320 31585 31616 32006 32116 32127 32183 32218 32439 32525 32804 33349
 33745 33864 34024 34084 34738 35135 35912 35999 36511 36666 36799 36854
 37041 37198 37261 37315 37782 37995 38055 38169 38314 38338 38563 38603
 38637 38641 38690 38754 38867 38883 39008 39134 39156 39168 39214 39303
 39339 39405 39490 39491 39517 39534 39704 39723 39832 39833 39845 39846
 39858 39859 39860 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [32088] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    20    71    77    93   152   163   169   518   580   664   705
   723   724   948   962  1113  1317  1493  1494  1510  1990  2864  3710
  3711  3726  5424  5487  5560  5696  5697  6178  7401  7815  7920  9198
  9800 10097 10191 11399 11799 12154 12678 12891 12938 13045 13902 13993
 14025 14049 14918 15284 15327 15587 15739 16520 17290 18118 18157 18465
 18578 18782 19447 19593 19628 19629 19891 20933 20952 21022 21261 21433
 23573 23938 24618 24658 24697 24736 25182 25798 25992 26064 26145 27111
 27619 27626 27661 27932 28238 28394 28959 29117 29765 29792 29829 30276
 31021 31057 31195 31232 31499 32116 32117 32156 32158 32192 32227 32594
 33254 33294 33324 33745 34738 36278 36932 37070 37226 37315 37385 37620
 37995 38208 38520 38521 38690 38827 38867 39054 39168 39481] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [6140] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   13   152   163   169  1442  8131  8166  9343  9375 10661 39707] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3     4     5    22    33    47    48    50    52    61    62    63
    66    71    75    76    77    78    86    89    90    91    92    93
    95    99   103   104   105   106   107   108   114   115   117   118
   119   120   121   122   124   127   128   129   130   131   132   133
   134   135   137   142   143   144   145   146   147   152   153   154
   155   156   157   158   159   160   161   162   163   164   165   167
   168   169   170   171   172   173   174   518   538   539   580   685
   962  1315  1337  1340  1493  1494  2136  2863  3491  3710  3711  4496
  5036  5562  5623  5696  5697  6625  7206  7827  7877  7965  7987  8131
  8203  8424  8468  8506  8842  8875  8947  8986  8988  9201  9243  9342
  9343  9374  9375  9377  9411 10040 10100 10204 10246 10384 10402 10417
 10424 10447 10496 10625 10626 10657 10661 10694 10733 10770 10809 10811
 11428 11521 11532 11604 11694 11710 11725 11792 11850 11935 12915 12938
 12950 13045 13058 13114 13281 13427 13622 13791 13831 13942 13993 14012
 14049 14151 14200 14284 14406 14524 14600 14764 14844 14929 14962 15722
 15835 15943 16025 16087 16096 16713 16932 17080 17087 17103 17125 17127
 17149 17206 17236 17261 17268 17290 17403 17405 17464 17638 17641 17676
 18051 18157 18269 18465 18540 18559 18615 18630 18669 18677 18782 18846
 19203 19593 19732 19868 19897 20364 20849 20933 20935 20952 20986 21022
 21182 21207 21261 21290 21357 21358 21366 21379 21398 21417 21432 21460
 21864 22066 22236 22648 22699 22700 22723 22744 22810 22815 22818 22846
 22861 23243 23246 23322 23573 23848 24000 24076 24191 24192 24221 24655
 24658 24697 25145 25215 25305 25488 25528 25558 25574 25578 25580 25586
 25631 25766 25798 26064 26065 26105 26145 26314 26773 26914 26941 26947
 26964 27111 27290 27292 27293 27586 27622 27661 27841 28118 28214 28345
 28395 28490 28491 28526 28527 28528 28565 28959 29117 29450 29723 29725
 29758 29793 29829 30276 30525 30830 30837 30886 30944 30979 31019 31312
 31320 31585 31616 32006 32116 32127 32183 32218 32439 32525 32804 33349
 33745 33864 34024 34084 34738 35135 35912 35999 36511 36666 36799 36854
 37041 37198 37261 37315 37782 37995 38055 38169 38314 38338 38563 38603
 38637 38641 38690 38754 38867 38883 39008 39134 39156 39168 39214 39303
 39339 39405 39490 39491 39517 39534 39704 39723 39832 39833 39845 39846
 39858 39859 39860 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [32088] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    20    71    77    93   152   163   169   518   580   664   705
   723   724   948   962  1113  1317  1493  1494  1510  1990  2864  3710
  3711  3726  5424  5487  5560  5696  5697  6178  7401  7815  7920  9198
  9800 10097 10191 11399 11799 12154 12678 12891 12938 13045 13902 13993
 14025 14049 14918 15284 15327 15587 15739 16520 17290 18118 18157 18465
 18578 18782 19447 19593 19628 19629 19891 20933 20952 21022 21261 21433
 23573 23938 24618 24658 24697 24736 25182 25798 25992 26064 26145 27111
 27619 27626 27661 27932 28238 28394 28959 29117 29765 29792 29829 30276
 31021 31057 31195 31232 31499 32116 32117 32156 32158 32192 32227 32594
 33254 33294 33324 33745 34738 36278 36932 37070 37226 37315 37385 37620
 37995 38208 38520 38521 38690 38827 38867 39054 39168 39481] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [6140] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   13   152   163   169  1442  8131  8166  9343  9375 10661 39707] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3     4     5    22    33    47    48    50    52    61    62    63
    66    71    75    76    77    78    86    89    90    91    92    93
    95    99   103   104   105   106   107   108   114   115   117   118
   119   120   121   122   124   127   128   129   130   131   132   133
   134   135   137   142   143   144   145   146   147   152   153   154
   155   156   157   158   159   160   161   162   163   164   165   167
   168   169   170   171   172   173   174   518   538   539   580   685
   962  1315  1337  1340  1493  1494  2136  2863  3491  3710  3711  4496
  5036  5562  5623  5696  5697  6625  7206  7827  7877  7965  7987  8131
  8203  8424  8468  8506  8842  8875  8947  8986  8988  9201  9243  9342
  9343  9374  9375  9377  9411 10040 10100 10204 10246 10384 10402 10417
 10424 10447 10496 10625 10626 10657 10661 10694 10733 10770 10809 10811
 11428 11521 11532 11604 11694 11710 11725 11792 11850 11935 12915 12938
 12950 13045 13058 13114 13281 13427 13622 13791 13831 13942 13993 14012
 14049 14151 14200 14284 14406 14524 14600 14764 14844 14929 14962 15722
 15835 15943 16025 16087 16096 16713 16932 17080 17087 17103 17125 17127
 17149 17206 17236 17261 17268 17290 17403 17405 17464 17638 17641 17676
 18051 18157 18269 18465 18540 18559 18615 18630 18669 18677 18782 18846
 19203 19593 19732 19868 19897 20364 20849 20933 20935 20952 20986 21022
 21182 21207 21261 21290 21357 21358 21366 21379 21398 21417 21432 21460
 21864 22066 22236 22648 22699 22700 22723 22744 22810 22815 22818 22846
 22861 23243 23246 23322 23573 23848 24000 24076 24191 24192 24221 24655
 24658 24697 25145 25215 25305 25488 25528 25558 25574 25578 25580 25586
 25631 25766 25798 26064 26065 26105 26145 26314 26773 26914 26941 26947
 26964 27111 27290 27292 27293 27586 27622 27661 27841 28118 28214 28345
 28395 28490 28491 28526 28527 28528 28565 28959 29117 29450 29723 29725
 29758 29793 29829 30276 30525 30830 30837 30886 30944 30979 31019 31312
 31320 31585 31616 32006 32116 32127 32183 32218 32439 32525 32804 33349
 33745 33864 34024 34084 34738 35135 35912 35999 36511 36666 36799 36854
 37041 37198 37261 37315 37782 37995 38055 38169 38314 38338 38563 38603
 38637 38641 38690 38754 38867 38883 39008 39134 39156 39168 39214 39303
 39339 39405 39490 39491 39517 39534 39704 39723 39832 39833 39845 39846
 39858 39859 39860 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [32088] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

Average validation scores by screening percentile:
screening_percentile=2: 0.5476
screening_percentile=4: 0.5999 (best)
screening_percentile=8: 0.5895
screening_percentile=16:        0.5669
screening_percentile=32:        0.4854
screening_percentile=64:        0.4736
/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   163   169  1493  1494  3710  3711  5696  7987  9201  9343 10661
 13045 13993 14049 14151 14764 16713 17087 18157 18782 20933 20952 21207
 23573 25798 26105 26145 27111 27619 28959 30276 32127 32525 33745 34738
 36511 37198 37315 37995 38867] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    52    99   152   162   169   172   173   174   255   294   511
   512   518   537   538   539   540   557   580   644   664   705   724
   726   743   744   818   819   927   931   948   969  1295  1317  1476
  1492  1494  1513  1959  1990  1991  2006  2007  2027  2097  2143  2797
  2851  2861  2863  2864  2865  2866  2983  3709  3710  3816  4679  4831
  5046  5711  5894  6821  6989  9315 10490 12866 13805 14371 15739 16059
 17156 17165 19604 21227 21252 27932 27961 30674 31646 31762 32679 35093
 35204 36184 36545 36826 37620 38006 38202 38208 38255 38315 38340 38487
 38501 38523 38722 38745 38867 38925 39095 39213 39444 39481 39517 39558
 39635 39699 39716 39730] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [7875] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [ 6482 15078] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   162   169   172   173   174   238   538   580  2006  8099  8131
  9343  9375 10661 12866 25589 38972 39584 39694] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [487 515 534 561 574 595 596 637 658 660 680 782 800 801 802 817 818 819
 820 821 834 835 836 837 838 839 852 853 862 865] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [4579] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    4     5    13    22    50    52    58    59    60    61    62    63
    66    67    68    69    70    71    72    73    74    75    76    77
    78    79    80    81    82    83    84    85    86    87    88    89
    90    91    92    93    94    95    96    97    98    99   100   101
   102   103   104   105   106   107   108   109   110   111   112   113
   114   115   116   117   118   119   120   121   122   123   124   125
   126   127   128   129   130   131   132   133   134   135   136   137
   138   139   140   141   142   143   144   145   146   147   148   149
   150   151   152   153   154   155   156   157   158   159   160   161
   162   163   164   165   166   167   168   169   170   171   172   173
   174   538   539   580  9347  9375 10661 14697 16094 27961 35093 39192
 39213 39444 39480 39699 39829 39830 39831 39832 39833 39841 39842 39843
 39844 39845 39846 39854 39855 39856 39857 39858 39859 39860 39868 39869
 39870 39879 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  660   681   789   802   841   853   854   855   865   866   867   879
  6140  7312  7348  7453  8536  8609  8643 13071 14298 14441 15834 22844
 24199 26933 28244 29526 30127 38059] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    52    99   152   162   169   172   173   174   255   294   511
   512   518   537   538   539   540   557   580   644   664   705   724
   726   743   744   818   819   927   931   948   969  1295  1317  1476
  1492  1494  1513  1959  1990  1991  2006  2007  2027  2097  2143  2797
  2851  2861  2863  2864  2865  2866  2983  3709  3710  3816  4679  4831
  5046  5711  5894  6821  6989  9315 10490 12866 13805 14371 15739 16059
 17156 17165 19604 21227 21252 27932 27961 30674 31646 31762 32679 35093
 35204 36184 36545 36826 37620 38006 38202 38208 38255 38315 38340 38487
 38501 38523 38722 38745 38867 38925 39095 39213 39444 39481 39517 39558
 39635 39699 39716 39730] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [7875] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [ 6482 15078] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   162   169   172   173   174   238   538   580  2006  8099  8131
  9343  9375 10661 12866 25589 38972 39584 39694] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [487 515 534 561 574 595 596 637 658 660 680 782 800 801 802 817 818 819
 820 821 834 835 836 837 838 839 852 853 862 865] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [4579] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    4     5    13    22    50    52    58    59    60    61    62    63
    66    67    68    69    70    71    72    73    74    75    76    77
    78    79    80    81    82    83    84    85    86    87    88    89
    90    91    92    93    94    95    96    97    98    99   100   101
   102   103   104   105   106   107   108   109   110   111   112   113
   114   115   116   117   118   119   120   121   122   123   124   125
   126   127   128   129   130   131   132   133   134   135   136   137
   138   139   140   141   142   143   144   145   146   147   148   149
   150   151   152   153   154   155   156   157   158   159   160   161
   162   163   164   165   166   167   168   169   170   171   172   173
   174   538   539   580  9347  9375 10661 14697 16094 27961 35093 39192
 39213 39444 39480 39699 39829 39830 39831 39832 39833 39841 39842 39843
 39844 39845 39846 39854 39855 39856 39857 39858 39859 39860 39868 39869
 39870 39879 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  660   681   789   802   841   853   854   855   865   866   867   879
  6140  7312  7348  7453  8536  8609  8643 13071 14298 14441 15834 22844
 24199 26933 28244 29526 30127 38059] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    52    99   152   162   169   172   173   174   255   294   511
   512   518   537   538   539   540   557   580   644   664   705   724
   726   743   744   818   819   927   931   948   969  1295  1317  1476
  1492  1494  1513  1959  1990  1991  2006  2007  2027  2097  2143  2797
  2851  2861  2863  2864  2865  2866  2983  3709  3710  3816  4679  4831
  5046  5711  5894  6821  6989  9315 10490 12866 13805 14371 15739 16059
 17156 17165 19604 21227 21252 27932 27961 30674 31646 31762 32679 35093
 35204 36184 36545 36826 37620 38006 38202 38208 38255 38315 38340 38487
 38501 38523 38722 38745 38867 38925 39095 39213 39444 39481 39517 39558
 39635 39699 39716 39730] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [7875] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [ 6482 15078] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   162   169   172   173   174   238   538   580  2006  8099  8131
  9343  9375 10661 12866 25589 38972 39584 39694] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [487 515 534 561 574 595 596 637 658 660 680 782 800 801 802 817 818 819
 820 821 834 835 836 837 838 839 852 853 862 865] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [4579] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    4     5    13    22    50    52    58    59    60    61    62    63
    66    67    68    69    70    71    72    73    74    75    76    77
    78    79    80    81    82    83    84    85    86    87    88    89
    90    91    92    93    94    95    96    97    98    99   100   101
   102   103   104   105   106   107   108   109   110   111   112   113
   114   115   116   117   118   119   120   121   122   123   124   125
   126   127   128   129   130   131   132   133   134   135   136   137
   138   139   140   141   142   143   144   145   146   147   148   149
   150   151   152   153   154   155   156   157   158   159   160   161
   162   163   164   165   166   167   168   169   170   171   172   173
   174   538   539   580  9347  9375 10661 14697 16094 27961 35093 39192
 39213 39444 39480 39699 39829 39830 39831 39832 39833 39841 39842 39843
 39844 39845 39846 39854 39855 39856 39857 39858 39859 39860 39868 39869
 39870 39879 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  660   681   789   802   841   853   854   855   865   866   867   879
  6140  7312  7348  7453  8536  8609  8643 13071 14298 14441 15834 22844
 24199 26933 28244 29526 30127 38059] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    52    99   152   162   169   172   173   174   255   294   511
   512   518   537   538   539   540   557   580   644   664   705   724
   726   743   744   818   819   927   931   948   969  1295  1317  1476
  1492  1494  1513  1959  1990  1991  2006  2007  2027  2097  2143  2797
  2851  2861  2863  2864  2865  2866  2983  3709  3710  3816  4679  4831
  5046  5711  5894  6821  6989  9315 10490 12866 13805 14371 15739 16059
 17156 17165 19604 21227 21252 27932 27961 30674 31646 31762 32679 35093
 35204 36184 36545 36826 37620 38006 38202 38208 38255 38315 38340 38487
 38501 38523 38722 38745 38867 38925 39095 39213 39444 39481 39517 39558
 39635 39699 39716 39730] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [7875] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [ 6482 15078] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   162   169   172   173   174   238   538   580  2006  8099  8131
  9343  9375 10661 12866 25589 38972 39584 39694] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [487 515 534 561 574 595 596 637 658 660 680 782 800 801 802 817 818 819
 820 821 834 835 836 837 838 839 852 853 862 865] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [4579] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    4     5    13    22    50    52    58    59    60    61    62    63
    66    67    68    69    70    71    72    73    74    75    76    77
    78    79    80    81    82    83    84    85    86    87    88    89
    90    91    92    93    94    95    96    97    98    99   100   101
   102   103   104   105   106   107   108   109   110   111   112   113
   114   115   116   117   118   119   120   121   122   123   124   125
   126   127   128   129   130   131   132   133   134   135   136   137
   138   139   140   141   142   143   144   145   146   147   148   149
   150   151   152   153   154   155   156   157   158   159   160   161
   162   163   164   165   166   167   168   169   170   171   172   173
   174   538   539   580  9347  9375 10661 14697 16094 27961 35093 39192
 39213 39444 39480 39699 39829 39830 39831 39832 39833 39841 39842 39843
 39844 39845 39846 39854 39855 39856 39857 39858 39859 39860 39868 39869
 39870 39879 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  660   681   789   802   841   853   854   855   865   866   867   879
  6140  7312  7348  7453  8536  8609  8643 13071 14298 14441 15834 22844
 24199 26933 28244 29526 30127 38059] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    52    99   152   162   169   172   173   174   255   294   511
   512   518   537   538   539   540   557   580   644   664   705   724
   726   743   744   818   819   927   931   948   969  1295  1317  1476
  1492  1494  1513  1959  1990  1991  2006  2007  2027  2097  2143  2797
  2851  2861  2863  2864  2865  2866  2983  3709  3710  3816  4679  4831
  5046  5711  5894  6821  6989  9315 10490 12866 13805 14371 15739 16059
 17156 17165 19604 21227 21252 27932 27961 30674 31646 31762 32679 35093
 35204 36184 36545 36826 37620 38006 38202 38208 38255 38315 38340 38487
 38501 38523 38722 38745 38867 38925 39095 39213 39444 39481 39517 39558
 39635 39699 39716 39730] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [7875] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [ 6482 15078] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   162   169   172   173   174   238   538   580  2006  8099  8131
  9343  9375 10661 12866 25589 38972 39584 39694] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [487 515 534 561 574 595 596 637 658 660 680 782 800 801 802 817 818 819
 820 821 834 835 836 837 838 839 852 853 862 865] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [4579] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    4     5    13    22    50    52    58    59    60    61    62    63
    66    67    68    69    70    71    72    73    74    75    76    77
    78    79    80    81    82    83    84    85    86    87    88    89
    90    91    92    93    94    95    96    97    98    99   100   101
   102   103   104   105   106   107   108   109   110   111   112   113
   114   115   116   117   118   119   120   121   122   123   124   125
   126   127   128   129   130   131   132   133   134   135   136   137
   138   139   140   141   142   143   144   145   146   147   148   149
   150   151   152   153   154   155   156   157   158   159   160   161
   162   163   164   165   166   167   168   169   170   171   172   173
   174   538   539   580  9347  9375 10661 14697 16094 27961 35093 39192
 39213 39444 39480 39699 39829 39830 39831 39832 39833 39841 39842 39843
 39844 39845 39846 39854 39855 39856 39857 39858 39859 39860 39868 39869
 39870 39879 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  660   681   789   802   841   853   854   855   865   866   867   879
  6140  7312  7348  7453  8536  8609  8643 13071 14298 14441 15834 22844
 24199 26933 28244 29526 30127 38059] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    3    52    99   152   162   169   172   173   174   255   294   511
   512   518   537   538   539   540   557   580   644   664   705   724
   726   743   744   818   819   927   931   948   969  1295  1317  1476
  1492  1494  1513  1959  1990  1991  2006  2007  2027  2097  2143  2797
  2851  2861  2863  2864  2865  2866  2983  3709  3710  3816  4679  4831
  5046  5711  5894  6821  6989  9315 10490 12866 13805 14371 15739 16059
 17156 17165 19604 21227 21252 27932 27961 30674 31646 31762 32679 35093
 35204 36184 36545 36826 37620 38006 38202 38208 38255 38315 38340 38487
 38501 38523 38722 38745 38867 38925 39095 39213 39444 39481 39517 39558
 39635 39699 39716 39730] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [7875] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [ 6482 15078] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  152   162   169   172   173   174   238   538   580  2006  8099  8131
  9343  9375 10661 12866 25589 38972 39584 39694] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [487 515 534 561 574 595 596 637 658 660 680 782 800 801 802 817 818 819
 820 821 834 835 836 837 838 839 852 853 862 865] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [4579] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [    4     5    13    22    50    52    58    59    60    61    62    63
    66    67    68    69    70    71    72    73    74    75    76    77
    78    79    80    81    82    83    84    85    86    87    88    89
    90    91    92    93    94    95    96    97    98    99   100   101
   102   103   104   105   106   107   108   109   110   111   112   113
   114   115   116   117   118   119   120   121   122   123   124   125
   126   127   128   129   130   131   132   133   134   135   136   137
   138   139   140   141   142   143   144   145   146   147   148   149
   150   151   152   153   154   155   156   157   158   159   160   161
   162   163   164   165   166   167   168   169   170   171   172   173
   174   538   539   580  9347  9375 10661 14697 16094 27961 35093 39192
 39213 39444 39480 39699 39829 39830 39831 39832 39833 39841 39842 39843
 39844 39845 39846 39854 39855 39856 39857 39858 39859 39860 39868 39869
 39870 39879 39887] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [  660   681   789   802   841   853   854   855   865   866   867   879
  6140  7312  7348  7453  8536  8609  8643 13071 14298 14441 15834 22844
 24199 26933 28244 29526 30127 38059] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

Average validation scores by screening percentile:
screening_percentile=2: 0.5601
screening_percentile=4: 0.5629
screening_percentile=8: 0.5657
screening_percentile=16:        0.5766
screening_percentile=32:        0.5781
screening_percentile=64:        0.5822 (best)
/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [   22    95    99   152   162   169   172   173   174   538   539   557
   580  1494  2006 10661 12866 27961 38208 39213] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:112: UserWarning:

Features [ 660  865 6140 7312] are constant.

/home/runner/work/nilearn/nilearn/.tox/doc/lib/python3.10/site-packages/sklearn/feature_selection/_univariate_selection.py:113: RuntimeWarning:

invalid value encountered in divide

Mean ± std test score:  0.7029 ± 0.0693

Estimated memory usage: 1014 MB