Cody

# Problem 545. Flip the main diagonal of a matrix

Solution 1674717

Submitted on 15 Nov 2018 by Alan
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### Test Suite

Test Status Code Input and Output
1   Pass
M=magic(5); y_correct = [9, 24,1,8 ,15; 23 ,21,7,14,16; ... 4,6,13,20,22; 10,12,19,5,3; 11,18,25,2,17]; assert(isequal(flipDiagonal(M),y_correct))

y = 9 21 13 5 17 a = 9 24 1 8 15 23 5 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9 a = 9 24 1 8 15 23 21 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9 a = 9 24 1 8 15 23 21 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9 a = 9 24 1 8 15 23 21 7 14 16 4 6 13 20 22 10 12 19 5 3 11 18 25 2 9 a = 9 24 1 8 15 23 21 7 14 16 4 6 13 20 22 10 12 19 5 3 11 18 25 2 17 y = 9 24 1 8 15 23 21 7 14 16 4 6 13 20 22 10 12 19 5 3 11 18 25 2 17

2   Pass
M=magic(2); y_correct=[2 3; 4 1]; assert(isequal(flipDiagonal(M),y_correct))

y = 2 1 a = 2 3 4 2 a = 2 3 4 1 y = 2 3 4 1

3   Pass
M=ones(4); M(2,2)=4; M(3,3)=9; M(4,4)=16; y_correct=ones(4); y_correct(1,1)=16; y_correct(2,2)=9; y_correct(3,3)=4; assert(isequal(flipDiagonal(M),y_correct))

y = 16 9 4 1 a = 16 1 1 1 1 4 1 1 1 1 9 1 1 1 1 16 a = 16 1 1 1 1 9 1 1 1 1 9 1 1 1 1 16 a = 16 1 1 1 1 9 1 1 1 1 4 1 1 1 1 16 a = 16 1 1 1 1 9 1 1 1 1 4 1 1 1 1 1 y = 16 1 1 1 1 9 1 1 1 1 4 1 1 1 1 1

4   Pass
M=[1]; y_correct=[1]; assert(isequal(flipDiagonal(M),y_correct))

y = 1 a = 1 y = 1

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

y = 25 19 13 7 1 a = 25 6 11 16 21 2 7 12 17 22 3 8 13 18 23 4 9 14 19 24 5 10 15 20 25 a = 25 6 11 16 21 2 19 12 17 22 3 8 13 18 23 4 9 14 19 24 5 10 15 20 25 a = 25 6 11 16 21 2 19 12 17 22 3 8 13 18 23 4 9 14 19 24 5 10 15 20 25 a = 25 6 11 16 21 2 19 12 17 22 3 8 13 18 23 4 9 14 7 24 5 10 15 20 25 a = 25 6 11 16 21 2 19 12 17 22 3 8 13 18 23 4 9 14 7 24 5 10 15 20 1 y = 25 6 11 16 21 2 19 12 17 22 3 8 13 18 23 4 9 14 7 24 5 10 15 20 1

6   Pass
M=[1,1,1,1;2,2,2,2;3,3,3,3;4,4,4,4]; y_correct=[4,1,1,1;2,3,2,2;3,3,2,3;4,4,4,1]; assert(isequal(flipDiagonal(M),y_correct))

y = 4 3 2 1 a = 4 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 a = 4 1 1 1 2 3 2 2 3 3 3 3 4 4 4 4 a = 4 1 1 1 2 3 2 2 3 3 2 3 4 4 4 4 a = 4 1 1 1 2 3 2 2 3 3 2 3 4 4 4 1 y = 4 1 1 1 2 3 2 2 3 3 2 3 4 4 4 1