How to create matrix from another matrix?

Hi all. I have m(80x200) matrix. I want to take first 41 values from each column and create n(41x200) matrix. Do I need for loop for this?

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Azzi Abdelmalek
Azzi Abdelmalek le 14 Mai 2016
Modifié(e) : Azzi Abdelmalek le 14 Mai 2016
You want the first 41 rows of your matrix
A(1:41,:)

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