[Eeglablist] STUDY ERPimage trial range

[Arnaud Delorme]

Dear Jens,

the "trial range" is only an option for display, and it should be better termed "line subset option" because it only allows to select a range of lines in the ERP image. Leave it empty to show all the lines/trials.

ERPimage for STUDY is complex. By default, it computes an ERPimage for each cell of your design with the same number of lines (irrespective of your number of trials). This way, it is possible to perform standard statistics on the ERP images (as this is done for ERSP images for example). There is an option "concatenate" that is set when you pre-compute ERPimage. If you set it to "on" ('concatenate', 'on'), then the trials from all subjects are concatenated before computing ERP images. No statistics are computed but it is sometimes interesting to see how this type of ERPimage look like.

All of this is described in the tutorial and in the std_erpimage.m function help message.
Best,

Arno


On Sep 7, 2012, at 12:53 AM, Bernhardsson Jens wrote:

> Hello
>  
> Is there a way to include all trials and not have to define the trial range in the STUDY ERPimage?
>  
> Best
> Jens
>  
>  
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