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Thank you for your prompt reply. I have another problem: when I tried to convert the matrix back to a group. I used mtos(m3,g2) but it gave me the following error message: "m3 is not the same length as the sample". The sample is 726,190 and m3 is 726,188 (the first and last rows were elimi...

I converted a group1 (5 time-series so it is T X 5) to a matrix using @convert, now I need to multiply this matrix with the output of a PCA (5X5 EigenVector). I tried the following but nothing workds: I typed the following in the command pane: matrix m3 = emult(group1,pca) ---> in the manual it says...