[Eeglablist] How I obtain a brife component from the concatinated component?

[Jiangang Liu]

Hello!

	I have a 32-channel, 500-timepoint ERPs of 20 subjects. I want to applied ICA to these ERPs. Because the 500-timepoint is insufficent to perform an ICA of 32-channel, so I sub-average the EEG data for each subject, and then obtain 8 32-channel, 500-timepoint ERPs.
I concatinated  these  8 32-channel, 500-timepoint ERPs and applied ICA to them, then I obtain
32 independent components with 4000 timepoints.
    My question is: 
    How I obtain a 500-timepoint independent component from each of these 4000-points component.
    
　　Thanks

　　　　　　　　Jiangang Liu
　　　　　　　　liujg at fingerpass.net.cn
　　　　　　　　　　2006-05-13