added optional argument 'subjects_dir' to project_volume_data #304
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Dear PySurfers,
I have improved the "project_volume_data" function in surfer.io. It now accepts an additional optional argument "subjects_dir" of type str (default: None), which overrides the SUBJECTS_DIR environment variable in the call to Freesurfer's mri_vol2surf function by specifying its "--sd" argument.
I find this useful especially when, for instance, the Freesurfer code and the neuroimaging data live on different (remote) servers.
I have updated the documentation of that function by pasting the explanation of the same argument from PySurfer's "Brain" class. So it should be pretty clear what it does.
I hope you will find this useful!
Cheers,
Michael