How to identify and find same rows in a matrix?

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misbah 0332 2016-2-16

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https://ww2.mathworks.cn/matlabcentral/answers/268328-how-to-identify-and-find-same-rows-in-a-matrix

评论： Andrei Bobrov 2016-2-16

Let A be a vector. A = [1 2 3 4; 1 2 3 4; 5 6 7 8; 5 6 7 8; 6 5 4 8; 8 5 2 9] Task 1: Replace same row with single row, means remove repeated row, so updated matrix A will. A(updated) = [1 2 3 4; 5 6 7 8; 6 5 4 8; 8 5 2 9] Task 2: Identify same number of rows in matrix A. A = [1 2 3 4; 1 2 3 4; 5 6 7 8; 5 6 7 8; 6 5 4 8; 8 5 2 9] That is: First two rows are same = 2 Then next two rows are same = 2 Then one row is same = 1 Then one row is same = 1 so it becomes [2, 2, 1, 1] we save this identification in another variable that is same = [ 2, 2, 1, 1] please help me in performing these two tasks.