[Erppcatoolkit-support] PCA analyse on average ERP

[LiYa <liy...@ho...>]

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