Cody

# Problem 451. Is this matrix orthogonal?

Solution 166899

Submitted on 22 Nov 2012 by Jean
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### Test Suite

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

``` ```

2   Pass
%% test two x = orth(randn(4)); y_correct = true; assert(isequal(isOrthogonal(x),y_correct))

``` ```

3   Pass
%% test three x = orth(randn(5)); y_correct = true; assert(isequal(isOrthogonal(x),y_correct))

``` ```

4   Pass
%% test four x=sqrt([3,1;1,1]); y_correct = false; assert(isequal(isOrthogonal(x),y_correct))

``` ```

5   Pass
%% test five x = magic(6); y_correct = false; assert(isequal(isOrthogonal(x),y_correct))

```[Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 4.800964e-18.] [> In isOrthogonal at 2 In verifyCode>evaluateCode at 189 In verifyCode at 40 In fevalJSON at 14] ```

6   Pass
%% test six x = randn(2)+1; y_correct = false; assert(isequal(isOrthogonal(x),y_correct))

``` ```