Iím going to assume that you are using a file format like Neuroscan .AVG where each condition of each subject is a separate file.  If so, use the Single File option of the Read function to import them (see documentation).  Itíll form a single file in which each subject and each condition is separate but are all held in a single file for convenience sake.



On Dec 14, 2013, at 4:56 AM, Maria Serena Panasiti <m.serenapanasiti@gmail.com> wrote:

Dear All,

I have just downloaded the toolkit to perform PCA on my averaged data. I am struggling to understand how I can keep my experimental conditions separeted when I read my data on the toolkit.

I have two experimental conditions for each subject. I glued all of the averages together in the edit window (append function); I gave the same subject name to the two experimental conditions averages and assigned them a weight of :

weight   name
1            sub001   (This would be: AVg condtion1 subject1)
1            sub001   (This would be: AVg condtion2 subject1)
1            sub002    (This would be: AVg condtion1 subject2)
1            sub002   (This would be: AVg condtion2 subject2)
1            sub003   (This would be: AVg condtion1 subject3)
1            sub003   (This would be: AVg condtion2 subject3)

When I run the PCA, the toolkit treats each raw as a single participant (in the command window it would count up to six in this case)
So I was wondering if this was the right way to feed the program with different averages per conditions.

As I understood PCA I should need to keep conditions separated but please tell me if I am wrong.

Any help would be very much appreciated.

Best wishes,


Maria Serena Panasiti, Ph.D

Cognitive Social and Affective Neuroscience Lab
Department of Psychology.
University of Rome "La Sapienza".
Via dei Marsi 78 - 00185 - Roma.
Phone: (+39) 06-49917635. Fax: (+39) 06-49917635

School of Psychology & Clinical Language Sciences
University of Reading 
Reading, United Kingdom

Rapidly troubleshoot problems before they affect your business. Most IT
organizations don't have a clear picture of how application performance
affects their revenue. With AppDynamics, you get 100% visibility into your
Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro!
Erppcatoolkit-support mailing list


Joseph Dien,
Senior Research Scientist
Maryland Neuroimaging Center
University of Maryland 

Phone: 202-297-8117