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How to crop some matrix row

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Mahi Nazir
Mahi Nazir 2014-9-4
评论： Mahi Nazir 2014-9-4
How do I crop a 105x41 matrix to get a 41x41 matrix. I want to crop the top and bottom rows to get the central 41x41 matrix. Something like opposite of padarray?

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Andrei Bobrov
Andrei Bobrov 2014-9-4
A = randi([0 255],105,41,'uint8'); % your matrix
i1 = ceil(size(A,1)/2);
out = A(i1 - 20 : i1 + 20,:);

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