Problem 43596. Find the sum of the negative elements under the main diagonal.

Solution 1029996

Submitted on 24 Oct 2016 by SirSteve26

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Test	Status	Code Input and Output
1	Pass	A = [1 2; -3 0]; y_correct = -3; assert(isequal(sumOfN(A),y_correct)) b = 0 0 -3 0 y = -3
2	Pass	A = ones(8); y_correct = 0; assert(isequal(sumOfN(A),y_correct)) b = 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 1 0 0 0 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 0 y = 0
3	Pass	A = [-1 -3 -6; -6 0 -5; 1 2 5] y_correct = -6; assert(isequal(sumOfN(A),y_correct)) A = -1 -3 -6 -6 0 -5 1 2 5 b = 0 0 0 -6 0 0 1 2 0 y = -6
4	Pass	A = [-1 -3 -6; -6 0 -5; 1 2 -1] y_correct = -6; assert(isequal(sumOfN(A),y_correct)) A = -1 -3 -6 -6 0 -5 1 2 -1 b = 0 0 0 -6 0 0 1 2 0 y = -6