takespecific elements from matrix to build new one
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hey everybody i have 40*10 matrix i want to build new one that contain the first 10 rows (1:10,:) and the third 10 rows (31:40,:) so the new matrix will contain 20*10 . thanks in advance.
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If your original matrix is called A, then
B = [A(1:10,:); A(31:end,:)];
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