[Eeglablist] Re: Cluster ERSP and ITC

[Scott Makeig]

Larry -

The the name of the actual function called from the EEGLAB menu is shown 
in the window title panel. Here, it is erpimage(), called by 
pop_erpimage(). The next line of help research is therefore >> help 
pop_erpimage % or, and more directly helpful, >> help erpimage  % See 
the 'coher' keyword

Likewise, Plot > ... > Channel time/frequency  calls up pop_timef() 
which calls the command line function timef(). Here >> help timef % has 
another option, >> timef details,  % that shows a longer help/info 
message on the details. Some further mathematical detail is explained in 
the basic EEGLAB reference paper (Delorme & Makeig, 2004).

Scott Makeig

> Hi there,
>
> In the selection of "Channel ERP Image", the output shows ITC measured 
> against latency among other charts.  It also displays a specific 
> frequency
> for that graph.  My question is - is the frequency displayed here the 
> minimum value from whcih the ITC can be measured (in whcih case the 
> ITC is a
> general measure across the frequency range), or is it the "ideal" 
> frequency at which the ITC itself is measured exactly?
>
> Also, what is the range for selection of smoothing?  I know what it 
> does, but I'm not sure how inputting different values will 
> specifically effect
> smoothing.  Lastly, in "Channel Time frequency", what do the two 
> values in the wavelet cycles text box correspond to?  By default they 
> are set at "3
> 0.5"
>
> Best,
> - Larry Lau