Cody

Problem 2094. Sum of diagonals elements of a matrix

Solution 2652254

Submitted on 4 Jul 2020 by haiwang wang
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Test Suite

Test Status Code Input and Output
1   Pass
x = [1 2 3;4 5 6; 7 8 9;]; y_correct = 25; assert(isequal(DiagSum(x),y_correct));

k = 3 s1 = 1 s2 = 3 s1 = 1 5 s2 = 3 5 s1 = 1 5 9 s2 = 3 5 7 y = 25

2   Pass
x = [1 2 3 4 5;6 7 8 9 10; 11 12 13 14 15; 16 17 18 19 20; 21 22 23 24 25;]; y_correct = 117; assert(isequal(DiagSum(x),y_correct));

k = 5 s1 = 1 s2 = 5 s1 = 1 7 s2 = 5 9 s1 = 1 7 13 s2 = 5 9 13 s1 = 1 7 13 19 s2 = 5 9 13 17 s1 = 1 7 13 19 25 s2 = 5 9 13 17 21 y = 117

3   Pass
x = ones(7); y_correct = 13; assert(isequal(DiagSum(x),y_correct));

k = 7 s1 = 1 s2 = 1 s1 = 1 1 s2 = 1 1 s1 = 1 1 1 s2 = 1 1 1 s1 = 1 1 1 1 s2 = 1 1 1 1 s1 = 1 1 1 1 1 s2 = 1 1 1 1 1 s1 = 1 1 1 1 1 1 s2 = 1 1 1 1 1 1 s1 = 1 1 1 1 1 1 1 s2 = 1 1 1 1 1 1 1 y = 13

4   Pass
x = magic(9); y_correct = 697; assert(isequal(DiagSum(x),y_correct));

k = 9 s1 = 47 s2 = 45 s1 = 47 68 s2 = 45 44 s1 = 47 68 8 s2 = 45 44 43 s1 = 47 68 8 20 s2 = 45 44 43 42 s1 = 47 68 8 20 41 s2 = 45 44 43 42 41 s1 = 47 68 8 20 41 62 s2 = 45 44 43 42 41 40 s1 = 47 68 8 20 41 62 74 s2 = 45 44 43 42 41 40 39 s1 = 47 68 8 20 41 62 74 14 s2 = 45 44 43 42 41 40 39 38 s1 = 47 68 8 20 41 62 74 14 35 s2 = 45 44 43 42 41 40 39 38 37 y = 697