[Eeglablist] Multiple datasets into one ERPimage

Arnaud Delorme arno at salk.edu
Thu Dec 1 12:22:38 PST 2005

Dear Patrick,

you may for instance, change the data values at the very begining of the 
trial (one value per subject). However, the problem is that these values 
will be smoothed so you cannot really assign a direct correspondance of 
one line per subject. To know if a line of the ERPimage is homogenous 
(across subject) I use myself an entropy measure across smoothed trials 
and subjects (if it is homogenous, the entropy is maximum).



Patrick Craston wrote:

> Hi,
> I would like to plot multiple datasets (i.e. segments containing 
> different type stimuli) into one ERPimage. Of course I can just merge 
> the datasets and then plot them.
> But I need to identify each segment as to which type it is after it 
> has been plotted into the ERPimage.
> Is there a reasonable straight-forward way of for instance drawing a 
> dot of a certain colour prior to each line of the ERPimage depending 
> on the type of segment that makes up that line?
> Many thanks for your help.
> Patrick

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