Cody

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

Solution 1980121

Submitted on 17 Oct 2019
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### Test Suite

Test Status Code Input and Output
1   Fail
A = [1 2; -3 0]; y_correct = -3; assert(isequal(sumOfN(A),y_correct))

Undefined function 'trid' for input arguments of type 'double'. Error in sumOfN (line 2) y = trid(A) Error in Test1 (line 3) assert(isequal(sumOfN(A),y_correct))

2   Fail
A = ones(8); y_correct = 0; assert(isequal(sumOfN(A),y_correct))

Undefined function 'trid' for input arguments of type 'double'. Error in sumOfN (line 2) y = trid(A) Error in Test2 (line 3) assert(isequal(sumOfN(A),y_correct))

3   Fail
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

Undefined function 'trid' for input arguments of type 'double'. Error in sumOfN (line 2) y = trid(A) Error in Test3 (line 3) assert(isequal(sumOfN(A),y_correct))

4   Fail
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

Undefined function 'trid' for input arguments of type 'double'. Error in sumOfN (line 2) y = trid(A) Error in Test4 (line 3) assert(isequal(sumOfN(A),y_correct))