Cody

# Problem 44402. Horizontal matrix sort

Solution 1807720

Submitted on 6 May 2019
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### Test Suite

Test Status Code Input and Output
1   Fail
x = []; y_correct = []; assert(isequal(backAndforth(x),y_correct))

y = 1×0 empty double row vector

Assertion failed.

2   Pass
x = 0; y_correct = [0 0]; assert(isequal(backAndforth(x),y_correct))

y = 0 0

3   Fail
x = zeros(100); x(41,68) = 1; y_correct = zeros(100,200); y_correct(41,100:101) = [1,1]; assert(isequal(backAndforth(x),y_correct))

Unable to perform assignment because the size of the left side is 100-by-100 and the size of the right side is 1-by-10000. Error in backAndforth (line 5) y(:,end+1:end+m)=y(end:-1:1) Error in Test3 (line 5) assert(isequal(backAndforth(x),y_correct))

4   Pass
x = [1 4 3 2]; y_correct = [1 2 3 4 4 3 2 1]; assert(isequal(backAndforth(x),y_correct))

y = 1 2 3 4 4 3 2 1

5   Pass
x = 1:10; y_correct = [x,fliplr(x)]; assert(isequal(backAndforth(x),y_correct))

y = 1 2 3 4 5 6 7 8 9 10 10 9 8 7 6 5 4 3 2 1

6   Fail
x = (1:10)'; y_correct = [x,x]; assert(isequal(backAndforth(x),y_correct))

y = 1 10 2 9 3 8 4 7 5 6 6 5 7 4 8 3 9 2 10 1

Assertion failed.

7   Fail
x = [1; 4; 3; 2]; y_correct = [1 1; 4 4; 3 3; 2 2]; assert(isequal(backAndforth(x),y_correct))

y = 1 2 4 3 3 4 2 1

Assertion failed.

8   Fail
x = [9 2 8 1; 5 4 9 8; 8 9 6 9]; y_correct = [1 2 8 9 9 8 2 1; 4 5 8 9 9 8 5 4; 6 8 9 9 9 9 8 6]; assert(isequal(backAndforth(x),y_correct))

Unable to perform assignment because the size of the left side is 3-by-4 and the size of the right side is 1-by-12. Error in backAndforth (line 5) y(:,end+1:end+m)=y(end:-1:1) Error in Test8 (line 5) assert(isequal(backAndforth(x),y_correct))

9   Fail
x = reshape(1:9,[3,3]); r = [1:3:7,7:-3:1]; y_correct = [r;r+1;r+2]; assert(isequal(backAndforth(x),y_correct))

Unable to perform assignment because the size of the left side is 3-by-3 and the size of the right side is 1-by-9. Error in backAndforth (line 5) y(:,end+1:end+m)=y(end:-1:1) Error in Test9 (line 4) assert(isequal(backAndforth(x),y_correct))