mne-tools/mne-python — pull request #261 by Eric89GXL (2012-12-12 23:52:46+00:00)
Title: ENH: Adding covarince reliability warning

I know that mne_process_raw would throw an error when there were too few samples used to calculate a covariance. I think we should do something similar, but perhaps throw a warning instead of throwing an error.

Don't merge yet 'til we figure out what the warning limit should be.