Cody

# Problem 413. Back to basics 23 - Triangular matrix

Solution 1173629

Submitted on 27 Apr 2017
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### Test Suite

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))

x = 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 x = 1 0 0 0 1 1 0 0 1 1 1 1 1 1 1 1 x = 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))

x = 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 x = 1 0 0 0 0 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 x = 1 0 0 0 0 1 1 0 0 0 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 x = 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   Fail
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))

x = 1 5 9 13 0 6 10 14 3 7 11 15 4 8 12 16 x = 1 5 9 13 0 6 10 14 0 0 11 15 4 8 12 16 x = 1 5 9 13 0 6 10 14 0 0 11 15 0 0 0 16

Assertion failed.

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))

x = 0 0 0 0 0 0 1 2 0 0 0 1 0 0 0 0 x = 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 x = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0