Select only determined rows in a matrix
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I have a matrix composed of 200 rows and I want to copy in another matrix one every 10 rows obtaining a final matrix of 20 rows...is there a smart way to do it or do I have to use a for loop to index the orws I want to copy?
采纳的回答
the cyclist
2021-11-28
% First matrix
A = rand(200,2);
% New matrix
B = A(10:10:end,:); % This will start with the 10th row. You could do B = A(1:10:end,:) to start with the first row.
更多回答（1 个）
Something like this. You'll have to adjust the starting index as needed:
A = repmat((1:100).',[1 4]) % smaller example (100x4)
B = A(10:10:end,:)
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