Cody

# Problem 451. Is this matrix orthogonal?

Solution 2151330

Submitted on 5 Mar 2020
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### Test Suite

Test Status Code Input and Output
1   Fail
x = orth(randn(3)); y_correct = true; assert(isequal(isOrthogonal(x),y_correct))

y = "false"

Undefined function 'eyes' for input arguments of type 'double'. Error in isOrthogonal (line 4) if (x\(x') - eyes(n,n))==zeros(n,n) Error in Test1 (line 3) assert(isequal(isOrthogonal(x),y_correct))

2   Fail
x = orth(randn(4)); y_correct = true; assert(isequal(isOrthogonal(x),y_correct))

y = "false"

Undefined function 'eyes' for input arguments of type 'double'. Error in isOrthogonal (line 4) if (x\(x') - eyes(n,n))==zeros(n,n) Error in Test2 (line 3) assert(isequal(isOrthogonal(x),y_correct))

3   Fail
x = orth(randn(5)); y_correct = true; assert(isequal(isOrthogonal(x),y_correct))

y = "false"

Undefined function 'eyes' for input arguments of type 'double'. Error in isOrthogonal (line 4) if (x\(x') - eyes(n,n))==zeros(n,n) Error in Test3 (line 3) assert(isequal(isOrthogonal(x),y_correct))

4   Fail
x=sqrt([3,1;1,1]); y_correct = false; assert(isequal(isOrthogonal(x),y_correct))

y = "false"

Undefined function 'eyes' for input arguments of type 'double'. Error in isOrthogonal (line 4) if (x\(x') - eyes(n,n))==zeros(n,n) Error in Test4 (line 3) assert(isequal(isOrthogonal(x),y_correct))

5   Fail
x = magic(6); y_correct = false; assert(isequal(isOrthogonal(x),y_correct))

y = "false" [Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 8.001607e-19.] [> In isOrthogonal (line 4) In ScoringEngineTestPoint5 (line 3) In solutionTest (line 11)]

Undefined function 'eyes' for input arguments of type 'double'. Error in isOrthogonal (line 4) if (x\(x') - eyes(n,n))==zeros(n,n) Error in Test5 (line 3) assert(isequal(isOrthogonal(x),y_correct))

6   Fail
x = randn(2)+1; y_correct = false; assert(isequal(isOrthogonal(x),y_correct))

y = "false"

Undefined function 'eyes' for input arguments of type 'double'. Error in isOrthogonal (line 4) if (x\(x') - eyes(n,n))==zeros(n,n) Error in Test6 (line 3) assert(isequal(isOrthogonal(x),y_correct))