[pymvpa] Difficulty importing PyMVPA tutorial datasets

[Lyam Bailey]

Dear users,


I'm trying to run some of the tutorials provided at http://www.pymvpa.org/tutorial.html, however I'm having trouble importing/accessing the tutorial data. For example, when using:

from mvpa2.datasets.sources.native import load_tutorial_data
ds = load_tutorial_data(roi=(15, 16, 23, 24, 36, 38, 39, 40, 48))


I get the following error:

FileNotFoundError                         Traceback (most recent call last)
<ipython-input-5-aa73ed9c4756> in <module>()
      2 from mvpa2.datasets.sources.native import load_tutorial_data
      3 datapath = pjoin(cfg.get('location', 'tutorial data', 'haxby2001'))
----> 4 ds = load_tutorial_data(roi=(15, 16, 23, 24, 36, 38, 39, 40, 48))

/home/lyam/anaconda2/lib/python2.7/site-packages/mvpa2/datasets/sources/native.pyc in load_tutorial_data(path, roi, add_fa, flavor)
    113         mask = nb.Nifti1Image(tmpmask.astype(int), nimg.affine, nimg.header)
    114     elif isinstance(roi, (tuple, list)):
--> 115         nimg = nb.load(pathjoin(maskpath, 'hoc.nii.gz'))
    116         tmpmask = np.zeros(nimg.shape, dtype='bool')
    117         for r in roi:

/home/lyam/anaconda2/lib/python2.7/site-packages/nibabel/loadsave.pyc in load(filename, **kwargs)
     40         stat_result = os.stat(filename)
     41     except OSError:
---> 42         raise FileNotFoundError("No such file or no access: '%s'" % filename)
     43     if stat_result.st_size <= 0:
     44         raise ImageFileError("Empty file: '%s'" % filename)

FileNotFoundError: No such file or no access: './haxby2001/sub001/masks/orig/hoc.nii.gz'


Clearly I can't access the data, but beyond that I'm not sure what's going on. Does anybody know what's going wrong here, and/or how to fix the problem?


Regards

Lyam

---------------------------------------------------------

Lyam Bailey, B.Sc., M.Sc.

Doctoral Student

Department of Psychology & Neuroscience
Dalhousie University

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