Cody

Problem 761. Create a matrix X, where each column is a shifted copy of the vector v

Solution 2764222

Submitted on 31 Jul 2020
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Test Suite

Test Status Code Input and Output
1   Fail
x = (1:5)'; y_correct = [1 5 4 3 2;2 1 5 4 3;3 2 1 5 4;4 3 2 1 5;5 4 3 2 1]; assert(isequal(shifted(x),y_correct))

Error using eye Size inputs must be scalar. Error in shifted (line 3) y = tril(y) + (triu(x+1 - triu(y)) - eye(x,x)*x); Error in Test1 (line 3) assert(isequal(shifted(x),y_correct))
2   Fail
x = (1:3)'; y_correct = [1 3 2;2 1 3;3 2 1]; assert(isequal(shifted(x),y_correct))

Error using eye Size inputs must be scalar. Error in shifted (line 3) y = tril(y) + (triu(x+1 - triu(y)) - eye(x,x)*x); Error in Test2 (line 3) assert(isequal(shifted(x),y_correct))
3   Fail
x = (1:4)'; y_correct = [1 4 3 2;2 1 4 3;3 2 1 4;4 3 2 1]; assert(isequal(shifted(x),y_correct))

Error using eye Size inputs must be scalar. Error in shifted (line 3) y = tril(y) + (triu(x+1 - triu(y)) - eye(x,x)*x); Error in Test3 (line 3) assert(isequal(shifted(x),y_correct))
4   Fail
x = (1:7)'; y_correct = [1 7 6 5 4 3 2;2 1 7 6 5 4 3;3 2 1 7 6 5 4;... 4 3 2 1 7 6 5;5 4 3 2 1 7 6; 6 5 4 3 2 1 7; 7 6 5 4 3 2 1]; assert(isequal(shifted(x),y_correct))

Error using eye Size inputs must be scalar. Error in shifted (line 3) y = tril(y) + (triu(x+1 - triu(y)) - eye(x,x)*x); Error in Test4 (line 4) assert(isequal(shifted(x),y_correct))
5   Fail
x = (1:6)'; y_correct = [1 6 5 4 3 2;2 1 6 5 4 3;3 2 1 6 5 4;... 4 3 2 1 6 5;5 4 3 2 1 6; 6 5 4 3 2 1]; assert(isequal(shifted(x),y_correct))

Error using eye Size inputs must be scalar. Error in shifted (line 3) y = tril(y) + (triu(x+1 - triu(y)) - eye(x,x)*x); Error in Test5 (line 4) assert(isequal(shifted(x),y_correct))

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