Cody

# Problem 451. Is this matrix orthogonal?

Solution 2050412

Submitted on 8 Dec 2019
This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

### Test Suite

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

x_size = 3 3

Assertion failed.

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

x_size = 4 4

Assertion failed.

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

x_size = 5 5

Assertion failed.

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

x_size = 2 2

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

x_size = 6 6 [Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 8.001607e-19.] [> In isOrthogonal (line 3) In ScoringEngineTestPoint5 (line 3) In solutionTest (line 11) In matlab.unittest.internal.executeCodeBlock (line 11) In matlab.unittest.internal/ScriptTestCaseProvider/evaluateTestSection (line 134) In matlab.unittest.internal/ScriptTestCaseProvider/runTestSection (line 128) In matlab.unittest.internal.ScriptTestCaseProvider>@(testCase)provider.runTestSection(testCase) (line 94) In matlab.unittest/FunctionTestCase/test (line 96) In matlab.unittest/TestRunner/evaluateMethodCore (line 870) In matlab.unittest/TestRunner/evaluateMethod (line 1186) In matlab.unittest/TestRunner/invokeTestContentOperatorMethod_ (line 925) In matlab.unittest.plugins/TestRunnerPlugin/evaluateMethod (line 729) In scoringengine/OutputPlugin/evaluateMethod In matlab.unittest.plugins/TestRunnerPlugin/invokeTestContentOperatorMethod_ (line 760) In matlab.unittest.plugins/TestRunnerPlugin/evaluateMethod (line 729) In scoringengine/FiguresPlugin/evaluateMethod In matlab.unittest.plugins/TestRunnerPlugin/invokeTestContentOperatorMethod_ (line 760) In matlab.unittest/TestRunner/evaluateMethodOnPlugins (line 438) In matlab.unittest/TestRunner/evaluateMethodsOnTestContent (line 812) In matlab.unittest/TestRunner/runTestMethod (line 1182) In matlab.unittest/TestRunner/invokeTestContentOperatorMethod_ (line 925) In matlab.unittest.plugins/TestRunnerPlugin/runTestMethod (line 648) In scoringengine/OutputPlugin/runTestMethod In matlab.unittest.plugins/TestRunnerPlugin/invokeTestContentOperatorMethod_ (line 760) In matlab.unittest.plugins/TestRunnerPlugin/runTestMethod (line 648) In scoringengine/FiguresPlugin/runTestMethod In matlab.unittest.plugins/TestRunnerPlugin/invokeTestContentOperatorMethod_ (line 760) In matlab.unittest/TestRunner/evaluateMethodOnPlugins (line 438) In matlab.unittest/TestRunner/runTest (line 1129) In matlab.unittest/TestRunner/repeatTest (line 516) In matlab.unittest/TestRunner/runSharedTestCase (line 472) In matlab.unittest/TestRunner/runTestClass (line 1039) In matlab.unittest/TestRunner/invokeTestContentOperatorMethod_ (line 925) In matlab.unittest/TestRunner/evaluateMethodOnPlugins (line 438) In matlab.unittest/TestRunner/runTestSuite (line 976) In matlab.unittest/TestRunner/invokeTestContentOperatorMethod_ (line 925) In matlab.unittest.plugins/TestRunnerPlugin/runTestSuite (line 265) In scoringengine/OutputPlugin/runTestSuite In matlab.unittest.plugins/TestRunnerPlugin/invokeTestContentOperatorMethod_ (line 760) In matlab.unittest.plugins/TestRunnerPlugin/runTestSuite (line 265) In scoringengine/FiguresPlugin/runTestSuite In matlab.unittest.plugins/TestRunnerPlugin/invokeTestContentOperatorMethod_ (line 760) In matlab.unittest.plugins/TestRunnerPlugin/runTestSuite (line 265) In matlab.unittest.plugins/DiagnosticsRecordingPlugin/runTestSuite (line 199) In matlab.unittest.plugins/TestRunnerPlugin/invokeTestContentOperatorMethod_ (line 760) In matlab.unittest/TestRunner/evaluateMethodOnPlugins (line 438) In matlab.unittest/TestRunner/evaluateMethodOnPluginsFromMethodName (line 426) In matlab.unittest.internal/SerialTestRunStrategy/runSession (line 21) In matlab.unittest/TestRunner/runSession (line 937) In matlab.unittest/TestRunner/invokeTestContentOperatorMethod_ (line 925) In matlab.unittest/TestRunner/evaluateMethodOnPlugins (line 438) In matlab.unittest/TestRunner/evaluateMethodOnPluginsFromMethodName (line 426) In matlab.unittest/TestRunner/doRunWithFcn (line 409) In matlab.unittest/TestRunner/run (line 297) In scoringengine.verifyCode In scoringengine.verifyCode In connector.internal.fevalMatlab In connector.internal.fevalJSON ]

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

x_size = 2 2