Cody

# Problem 413. Back to basics 23 - Triangular matrix

Solution 1586442

Submitted on 18 Jul 2018
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### Test Suite

Test Status Code Input and Output
1   Fail
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))

Error: File: triangle.m Line: 4 Column: 36 The end operator must be used within an array index expression. Error in Test1 (line 3) assert(isequal(triangle(x),y_correct))

2   Fail
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))

Error: File: triangle.m Line: 4 Column: 36 The end operator must be used within an array index expression. Error in Test2 (line 3) assert(isequal(triangle(x),y_correct))

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))

Error: File: triangle.m Line: 4 Column: 36 The end operator must be used within an array index expression. Error in Test3 (line 3) assert(isequal(triangle(x),y_correct))

4   Fail
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))

Error: File: triangle.m Line: 4 Column: 36 The end operator must be used within an array index expression. Error in Test4 (line 3) assert(isequal(triangle(x),y_correct))