Thread Subject: unbuffer on a processed matrix

Hi everyone,
I am doing principle component analysis (PCA) in simulink.
Since I need apply pca on a matrix. So I buffer the signal into a matrix, e.g, 15*10,
then apply the PCA, after that I got a modified data matrix, 15*10, now I want to use unbuffer to give frame by frame output. But it turns out that I can not unbuffer the processed matrix.
I hope I descibe the question clear enough for you to understand and hope someone can help me.

Thank you!

Hommy