# not enough samples to compute covariance

**URL:** <https://mne.discourse.group/t/not-enough-samples-to-compute-covariance/246>\
**Category:** Mailing List Archive (read-only)\
**Tags:** list-archive\
**Created:** [August 4, 2010, 8:07pm UTC](https://mne.discourse.group/t/not-enough-samples-to-compute-covariance/246 "2010-08-04T20:07:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\
**Post date:** [August 4, 2010, 8:07pm UTC](https://mne.discourse.group/t/not-enough-samples-to-compute-covariance/246/1 "2010-08-04T20:07:02Z")

</div>

When computing the covariance using mne\_process\_raw and a .cov file it  
returns too few samples error.

Then I decided to find the time interval of the raw files and use that for  
parameters tmin and tmax in the cov file, and it still returns too few  
samples error. Any idea on how I should go about this?