Giving credit

Previous topic

7.2.22. nilearn.datasets.fetch_megatrawls_netmats

Next topic

7.2.24. nilearn.datasets.get_data_dirs

Note

This page is a reference documentation. It only explains the function signature, and not how to use it. Please refer to the user guide for the big picture.

7.2.23. nilearn.datasets.fetch_cobre

nilearn.datasets.fetch_cobre(n_subjects=10, data_dir=None, url=None, verbose=1)

Fetch COBRE datasets preprocessed using NIAK 0.12.4 pipeline.

Downloads and returns preprocessed resting state fMRI datasets and phenotypic information such as demographic, clinical variables, measure of frame displacement FD (an average FD for all the time frames left after censoring).

For each subject, this function also returns .mat files which contains all the covariates that have been regressed out of the functional data. The covariates such as motion parameters, mean CSF signal, etc. It also contains a list of time frames that have been removed from the time series by censoring for high motion.

NOTE: The number of time samples vary, as some samples have been removed if tagged with excessive motion. This means that data is already time filtered. See output variable ‘description’ for more details.

Parameters:

n_subjects: int, optional

The number of subjects to load from maximum of 146 subjects. By default, 10 subjects will be loaded. If n_subjects=None, all subjects will be loaded.

data_dir: str, optional

Path to the data directory. Used to force data storage in a specified location. Default: None

url: str, optional

Override download url. Used for test only (or if you setup a mirror of the data). Default: None

verbose: int, optional

Verbosity level (0 means no message).

Returns:

data: Bunch

Dictionary-like object, the attributes are:

  • ‘func’: string list

    Paths to Nifti images.

  • ‘mat_files’: string list

    Paths to .mat files of each subject.

  • ‘phenotypic’: ndarray

    Contains data of clinical variables, sex, age, FD.

  • ‘description’: data description of the release and references.

Notes

More information about datasets structure, See: https://figshare.com/articles/COBRE_preprocessed_with_NIAK_0_12_4/1160600