[Eeglablist] Error when precomputing channel measures

[Makoto Miyakoshi]

Dear Alyson,

If you are using the older version of EEGLAB I recommend you update it and
try it again. Arno says there is a known problem in the older versions.

> When I begin precompute channel measures, however, I get the following
eeg_getdatact error "Datasets to be concatenated do not have the same
number of channels".

Hmm I personally haven't seen this yet.

> Looking at each dataset individually, the number of channels says 62 (as
it should, given that I've already interpolated any missing channels).

It's possible that the interpolation process failed to take care of
managing channel info. Can you try to do it without the interpolation
process?

Makoto

On Thu, Jun 25, 2015 at 11:51 AM, Alyson Abel <amills at mail.sdsu.edu> wrote:

> I have an error that is relatively common for me but that I can't seem to
> get to the bottom of. Here's the scenario: I have created a study with 12
> participants, each with 6 conditions. Looking at each dataset individually,
> the number of channels says 62 (as it should, given that I've already
> interpolated any missing channels). I want to do a 2x3 comparison so I set
> up the study design to concatenate 3 conditions twice. When I begin
> precompute channel measures, however, I get the following eeg_getdatact
> error "Datasets to be concatenated do not have the same number of
> channels".  Again, looking back at the datasets and looking at the ALLEEG
> file show the same number of channels across all datasets. Possibly of
> importance is that the datasets that are being concatenated are from the
> same participant, not combining across participants, thus I really don't
> understand why I would get the error that they don't have the number of
> channels.
>
> I hope this description is clear. Any assistance would be appreciated.
>
> Alyson
>
> ---
> Alyson D. Abel, Ph.D.
> Assistant Professor, School of Speech, Language and Hearing Sciences
> San Diego State University
> 5500 Campanile Dr., Rm 227
> San Diego, CA 92182
> alyson.abel at mail.sdsu.edu
> Office phone: (619) 594-4694
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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