Problem 1850. Create a matrix with difference of each row of input matrix

Solution 312149

Submitted on 29 Aug 2013 by Tobias Schäfer

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Test	Status	Code Input and Output
1	Pass	%% x = [1 2 3; 7 8 9; 10 40 60;] y_correct = [6 6 6;3 32 51; -9 -38 -57;] assert(isequal(MatDiff(x),y_correct)); x = 1 2 3 7 8 9 10 40 60 y_correct = 6 6 6 3 32 51 -9 -38 -57 ans = 6 6 6 3 32 51 -9 -38 -57
2	Pass	%% x = eye(3); y_correct = [ -1 1 0; 0 -1 1; 1 0 -1]; assert(isequal(MatDiff(x),y_correct)); ans = -1 1 0 0 -1 1 1 0 -1
3	Pass	%% x = repmat(7, 7, 7); y_correct = repmat(0, 7, 7); assert(isequal(MatDiff(x),y_correct)); ans = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
4	Pass	%% x = diag(1:4); y_correct = [ -1 2 0 0; 0 -2 3 0; 0 0 -3 4; 1 0 0 -4;] assert(isequal(MatDiff(x),y_correct)); y_correct = -1 2 0 0 0 -2 3 0 0 0 -3 4 1 0 0 -4 ans = -1 2 0 0 0 -2 3 0 0 0 -3 4 1 0 0 -4