[Eeglablist] question about pop_biosig

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Thu Jan 23 18:47:34 PST 2014


Dear Yunjo,

Update it to the latest v13. There was a major update in filter function
between 11 and 12.

If you reference to ch66 then your ch66 will be continuous zero, which
causes problems when you compute improbability test etc (since division by
0... I encountered this yesterday). So it's better to be removed. You can
interpolate the channel if you want (you can find a GUI commend for this),
so I recommend do try that. Sorry it's not exactly the same as before.

Makoto


2014/1/23 Yunjo Lee <ylee at research.baycrest.org>

> Hi all,
>
>
>
> I recently switched to more recent versions of EEG Lab (v11.0.5.4b), and
> started having a problem that I didn’t have with previous versions.
>
>
>
> When I import the data and initially reference the data to one channel
> (e.g., 66, see below), the channel #66 that is picked for initial
> referencing is removed from the data.  I know it’s not supposed to be
> removed from the data, allowing re-referencing. For re-referencing, I used
> average of all channels.
>
>
>
> EEG = pop_biosig(fullfile(pathname,filename),'ref',66,'blockepoch','off',
> 'rmeventchan','off');
>
>
>
> This problem doesn’t happen with a previous version of EEG Lab (v.9). How
> can I fix this?
>
>
>
> Thanks,
>
> Yunjo
>
>
>
>
>
>
>
>
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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