[Eeglablist] ersp output from timef

[Katherine Naish]

Hi all,



Sorry for the basic question, but I am struggling to understand exactly what the ersp values produced by timef represent. I thought that I understood the analysis at a reasonable level, but now that I have run the analysis I'm not sure which values I should be extracting in order to average across participants.



I have data from 128 channels, (re)sampled at 500hz. One specific question I have is what the x and y coordinates of the 'ersp' variable represent? I have read the help file and various other documents, but can't work out what 'nfreqs' and 'timesout' actually mean- why is ersp a 256x200 matrix?



Any help greatly appreciated,

Katherine



-------------------------------
Katherine Naish
School of Psychology
University of Reading & Goldsmiths University of London
+44(0)118 378 6946
http://www.neurobiography.info/handlab.php?page=people#Katherine-Naish
________________________________
From: eeglablist-bounces at sccn.ucsd.edu [eeglablist-bounces at sccn.ucsd.edu] on behalf of Nikola Vukovic [vukovicnikola at gmail.com]
Sent: 28 May 2013 04:48
To: EEGLAB List
Subject: [Eeglablist] Extracting average ERSP values for statistical analysis

Dear EEGlab Community,

I wonder if anyone can help me with the following issue:
>From my Study design, I would like to extract (for each participant and condition) the average power in a specific frequency band and a specific time window. I would like to export these values into SPSS for statistical analysis.
I should also note that I am working with IC Clusters, so the above ERSP measures should be cluster specific.
Does anyone know a script which would help me achieve this?

Yours gratefully,
Nikola
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