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PostPosted: Sun Sep 03, 2017 7:47 pm 
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Joined: Wed Aug 30, 2017 7:14 pm
Posts: 2
Hi!!!

I'm using the Cognionics HD 72 to acquisition with 8 electrodes, but I do not manage to train the filter; I obtain a warning saying :
" <Box algorithm::xDAWN Spatial Filter Trainer> Generalized eigen vector decomposition failed..."

I converted the archive (ov2csv) to see the columns.

Which column I need to delete?

https://imgur.com/a/LWsY0


Thanks!!!


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PostPosted: Wed Sep 06, 2017 7:58 am 
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Joined: Tue Dec 04, 2012 3:53 pm
Posts: 771
Location: INRIA Rennes, FRANCE
Hi Luciano,

not sure why it fails (isn't there any more information?) but I'd keep the EEG channels only. Also, the data scale seems to be massive (e+15). Check that this is as intended and then try to scale the data to some more meaningful range (e.g. simple dsp). If its not intended, check what makes it so and fix. A typical basic thing also to do is to use Signal Display to check that the signal looks like EEG in the first place. :)


Cheers,
Jussi


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