Re: [Erppcatoolkit-support] PCA analyse on average ERP

[Joseph D. <jd...@ma...>]

Hello Li Ya,
    sorry to hear you're having some difficulties using the Toolkit.  Could you give us a little more information?  When you say "However, the EP TOOLKIT and MATLAB cannot response after then." what do you mean?  Are you saying the scree test is not happening?  Or are you saying that you are unable to take the step after that?  If the latter, it would help to tell us exactly what you tried to do and what the Toolkit did.  Was there an error message?  Did you click on the data set name and nothing happened?  etc. etc.
Also, it's always helpful to indicate the operating system (Windows 7, OS X 10.5, etc.) and the version of Matlab and the version of the Toolkit.
Best way to do it is to type ver in the command window and then paste the results, as in:

>> ver
-------------------------------------------------------------------------------------
MATLAB Version 7.11.0.584 (R2010b)
MATLAB License Number: 521547
Operating System: Mac OS X  Version: 10.6.5 Build: 10H574 
Java VM Version: Java 1.6.0_22-b04-307-10M3261 with Apple Inc. Java HotSpot(TM) 64-Bit Server VM mixed mode
-------------------------------------------------------------------------------------
MATLAB                                                Version 7.11       (R2010b)  
ERP PCA Toolbox                                       Version 2.21                 
FastICA for Matlab 7.x and 6.x                        Version 2.5,       October 19
MATLAB Compiler                                       Version 4.14       (R2010b)  
Statistical Parametric Mapping                        Version 3684       (SPM8)    
Symbolic Math Toolbox                                 Version 5.5        (R2010b)  

Cheers!

Joe



On Jan 6, 2011, at 12:53 AM, LiYa wrote:

> Dear ALL,
>  
> I am new to PCA analyses and I have some question regarding this area. If anyone could please help me I will be more than grateful!
>  
> I intend to do a spatial-temporal PCA. The data is recorded by Brain vision Record and analyzed by Brain Vision Analyzer 2.0. Then the average ERPs for each participate and each condition is export respectivelyto Matlab files’s .mat, followed by saved as EEGLab’s .set by EEGLab.
>  
> After then, I intend to get the input to the PCA consisted of 1500 observations (3 conditions *500 data points per epoch) for each participant and electrode. To achieve this, I read all average data for each participant and each condition at first, and then I choose spatial mode and infomax rotation and place the #factors 0 to do the scree test. However, the EP TOOLKIT and MATLAB cannot response after then.
>  
> What's wrong with my operation? How can I place the input to the PCA consisted of all observations for each participant, each condition, each electrode and each timepoint rightly?  
>  
> Many thanks,
> 
> Li Ya
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