thankyou kang.
i want more question. sorry.
i Using the method proposed by V.Calhoun paper. and i saw in the paper.
first step of group anaysis is reduce the size of the time dimension Using "PCA". but "-pcsave" option is "number of components to save" marked.
if component reduced, Is time dimension reduce??
the meaning of time dimension is Amplitude of time point?
and second question.
in the second step, if serial concatenation,
example)
"A subject [0.....50] + B subject[51...100]+c subject[101...150]=150(serial)"
In the third step "reduce this matrix to N (the number of components to be estimated)"
where, estimated component is “common component” of individual subject?? If not mistaken, Brain Component time series of individual subject is different, right?? If different, how to PCA ??