[Mne_analysis] problem with sample data set: attempt to compute noise-cov fails

[Jeff Eriksen]

Eric,

Thanks for the input, but this is part of the sample/tutorial data
provided with the MNE installation and manual, and should just work. I am
hoping someone at MGH will respond.

-Jeff

On 4/13/12 5:01 PM, "Eric Larson" <larson.eric.d at gmail.com> wrote:

>It's likely that you either have too few events being used, or there
>are too many epochs that are being thrown out (due to exceeded
>thresholds or flat channels).
>
>Eric
>
>
>On Fri, Apr 13, 2012 at 4:55 PM, Jeff Eriksen <eriksenj at ohsu.edu> wrote:
>> Hi,
>>
>> I am trying to review the tutorial in Chapter 12. In section 12.10 I
>>entered
>> the mne-process-raw command to compute the noise-cov matrix,
>>
>> mne_process_raw --raw sample_audvis_raw.fif --lowpass 40 --projon
>> --savecovtag -cov --cov audvis.cov
>>
>> and got this error:
>>
>> Too few samples (required : 1835 got : 363)
>>
>> I used fresh copies of the input files.
>>
>> What could be going wrong? I cannot continue with
>>mne-do-inverse-operator
>> since it complains it does not have the sample-aaudvis-cov.fif file.
>>
>> Thanks,
>> -Jeff
>>
>>
>>
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