[Eeglablist] trial by trial ERSP?

[Arnaud Delorme]

Hi Andrew,

if you look into the command history, you will see calls to plotting functions, std_erpplot, std_erspplot etc...
Simply add extra output to these functions to collect the output. There is no need to deal with the data files (although this is possible as well).
For instance

[ STUDY erpdata erptimes] = std_erpplot(STUDY, ALLEEG, 'channels', { 'Fpz' });

In erpdata and erptimes you will get the data and time values respectively for electrode Fpz.
Best,

Arno

On Aug 13, 2011, at 4:19 AM, Andrew Hill wrote:

> Hi Teresa,
> 
> It does seem reasonable, and after running ERSP functions on a study the data is saved per file and design, e.g. one of mine is design2_140_530_SHAM.datersp
> 
> I'm just not sure how to manipulate it directly - the GUI tools are pretty good for plotting and comparing btw groups/subjects, but not as they change over time, or for exporting text files (feature request, Arno? :).
> 
> If I "load design2_140_530_SHAM.datersp -mat", then 3 structs for each channel get loaded, ersp, erspbase, and erspboot... and I don't get why they are the size they are 80x200, 1x80, 80x2 .. especially as this is a 64 channel dataset (of 2 second epochs @ 512 hz).. 
> 
> For output of values by event types, it'll require linking the calculated ersp data with ones in EEG.event, I assume...
> 
> Aside from not totally understanding what's in each file, my lack of ability to extract this stuff is mostly about my lack  matlab skills I'm sure.
> 
> Still getting the hang of it.  If you (or anyone else) knows a way to do this, could you toss me a hint? :)
> 
> Best,
> Andrew
> 
> On Aug 12, 2011, at 9:09 AM, Teresa Hawkes wrote:
> 
>> I am using EGI's hard- and software. I'd like to do that too. I was planning to output to Matlab and just extract the voltage by electrode and event of interest. Does this seem reasonable?
>> 
>> Cheers,
>> Teresa
>> 
>> 
>> 
>> On Thu, Aug 11, 2011 at 8:34 PM, Andrew Hill <andrewhill at ucla.edu> wrote:
>> hi,
>> 
>> I've done a bunch of ERSP analysis on a study set, and there are some intriguing results based on the ERPs I'm analyzing for a 30-min recording session with a single type of trial (event)... although of course the ERSP that's plotted is an "average".
>> 
>> At this point I'd like to output voltage on a trial-by-trial basis for the ERSP calculations i've made, specifying bands and time windows, to look at how the ERSP "trends" evolve over my 30 minutes.. can anyone suggest a way to do this?
>> 
>> Thanks,
>> Andrew
>> 
>> 
>> _______________________________________________
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>> 
>> 
>> -- 
>> Teresa D. Hawkes, B.F.A.
>> Ph.D. Candidate
>> Department of Human Physiology
>> University of Oregon
>> 348 Gerlinger Hall,
>> 1240 University of Oregon
>> Eugene, Oregon 97403-1240
>> Phone: 541-337-9443 (cell) or 541-346-0275 (laboratory)
>> thawkes at uoregon.edu
>> 
>> 
> 
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