[Eeglablist] Error STUDY: Cannot compute ERSPS because datasets do not have the same number of data points

[Lawrence Behmer]

Also, check to make sure your sampling rates are the same for each subject.

Cheers,
Lawrence


On Thu, Nov 14, 2013 at 6:26 AM, Laan, L.N. van der (Nynke) <
L.N.vanderLaan at uu.nl> wrote:

>  Hello all,
>
>
>
> I am using EEGlab to calculate and plot grand mean ERP’s (over multiple
> subjects) for two conditions. However, when I precompute the channel
> measures I get a message saying: ‘Cannot compute ERSPS because datasets do
> not have the same number of data points’. Afterwards I am not able to plot
> the channel measures (nothing happens) so I guess that the channel measures
> were not precomputed.
>
>
>
> Some background information: The input datasets for the study are epoched
> (and preprocessed/filtered/etc.) so for each subject I have two files
> (Subject1_conditionA and Subject1_conditionB). I have not performed ICA.
>
>
>
> The only thing that I want is an ERPimage from both conditions (for a few
> channels of interest).
>
>
>
> Does anyone know what is causing the problem? Is it a problem when the
> number of epochs is not equal (i.e., in some subjects I have 1-2 more
> trials of condition A or B)?
>
>
>
> Best regards,
>
> Nynke
>
>
>
>
>
> _______________________________________________
> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
> To unsubscribe, send an empty email to
> eeglablist-unsubscribe at sccn.ucsd.edu
> For digest mode, send an email with the subject "set digest mime" to
> eeglablist-request at sccn.ucsd.edu
>



-- 
Lawrence Behmer
WSU Dept. of Psychology
Visual Attention Lab
IGERT Fellow
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20131119/6b188baa/attachment.html>