Problem 413. Back to basics 23 - Triangular matrix

Solution 2134608

Submitted on 20 Feb 2020 by Nitin Patige

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Test	Status	Code Input and Output
1	Pass	x = ones(4,4); y_correct = [1 0 0 0; 1 1 0 0; 1 1 1 0; 1 1 1 1]; assert(isequal(triangle(x),y_correct)) y = [] b = 1 1 1 1 b = 1 0 0 0 y = 1 0 0 0 b = 1 1 1 1 b = 1 1 0 0 y = 1 0 0 0 1 1 0 0 b = 1 1 1 1 b = 1 1 1 0 y = 1 0 0 0 1 1 0 0 1 1 1 0 b = 1 1 1 1 b = 1 1 1 1 y = 1 0 0 0 1 1 0 0 1 1 1 0 1 1 1 1
2	Pass	x = ones(5,5); y_correct = [1 0 0 0 0; 1 1 0 0 0; 1 1 1 0 0; 1 1 1 1 0; 1 1 1 1 1]; assert(isequal(triangle(x),y_correct)) y = [] b = 1 1 1 1 1 b = 1 0 0 0 0 y = 1 0 0 0 0 b = 1 1 1 1 1 b = 1 1 0 0 0 y = 1 0 0 0 0 1 1 0 0 0 b = 1 1 1 1 1 b = 1 1 1 0 0 y = 1 0 0 0 0 1 1 0 0 0 1 1 1 0 0 b = 1 1 1 1 1 b = 1 1 1 1 0 y = 1 0 0 0 0 1 1 0 0 0 1 1 1 0 0 1 1 1 1 0 b = 1 1 1 1 1 b = 1 1 1 1 1 y = 1 0 0 0 0 1 1 0 0 0 1 1 1 0 0 1 1 1 1 0 1 1 1 1 1
3	Pass	x = reshape(1:16,[4,4]); y_correct = [1 2 3 4; 0 6 7 8; 0 0 11 12; 0 0 0 16]'; assert(isequal(triangle(x),y_correct)) y = [] b = 1 5 9 13 b = 1 0 0 0 y = 1 0 0 0 b = 2 6 10 14 b = 2 6 0 0 y = 1 0 0 0 2 6 0 0 b = 3 7 11 15 b = 3 7 11 0 y = 1 0 0 0 2 6 0 0 3 7 11 0 b = 4 8 12 16 b = 4 8 12 16 y = 1 0 0 0 2 6 0 0 3 7 11 0 4 8 12 16
4	Pass	x = [0 1 2 3; 0 0 1 2; 0 0 0 1; 0 0 0 0]; y_correct = zeros(4); assert(isequal(triangle(x),y_correct)) y = [] b = 0 1 2 3 b = 0 0 0 0 y = 0 0 0 0 b = 0 0 1 2 b = 0 0 0 0 y = 0 0 0 0 0 0 0 0 b = 0 0 0 1 b = 0 0 0 0 y = 0 0 0 0 0 0 0 0 0 0 0 0 b = 0 0 0 0 b = 0 0 0 0 y = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0