Problem 451. Is this matrix orthogonal?

Solution 1555907

Submitted on 10 Jun 2018 by J. S. Kowontan

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Test	Status	Code Input and Output
1	Pass	x = orth(randn(3)); y_correct = true; assert(isequal(isOrthogonal(x),y_correct))
2	Pass	x = orth(randn(4)); y_correct = true; assert(isequal(isOrthogonal(x),y_correct))
3	Pass	x = orth(randn(5)); y_correct = true; assert(isequal(isOrthogonal(x),y_correct))
4	Pass	x=sqrt([3,1;1,1]); y_correct = false; assert(isequal(isOrthogonal(x),y_correct))
5	Pass	x = magic(6); y_correct = false; assert(isequal(isOrthogonal(x),y_correct))
6	Pass	x = randn(2)+1; y_correct = false; assert(isequal(isOrthogonal(x),y_correct))