[MATLAB Grader] How to test if a matrix compares.

I am trying to set up a test function which evaluates the matrix generated by the students code against the sample solution in MATLAB Grader.

Is there a way of doing this? The suggested:

assessVariableEqual('A', referenceVariables.A, 'RelativeTolerance', 0.1, 'AbsoluteTolerance', 0.01);

has not worked.

Cheers

[Geoff Hayes]

@Brendan Waters - can you provide an example of this code not working? Is the tolerance too large? Is it intentional to use both tolerances?

[BW]

I have found an ad hoc way of making it work by having a separate function encasing the script, with the test:

[A,B] = q1a(X0,U0); 

% Run reference solution.
[ARef,Bref] = reference.q1a(X0,U0)

% Compare
assessVariableEqual('A', ARef);

However comparing the same code in a script environment using

assessVariableEqual('A', ARef)

doesnt work.

Was just testing tolerances to see if it made a difference.

[Cris LaPierre]

Can you share a sample script for testing purposes?

[BW]

Sorry wont be able to share, but have managed to resolve it based on your comment. Thank you greatly.

[Cris LaPierre]

I'll move my comment to be an answer then. Thanks

Answer 1

[Cris LaPierre]

The code you have provided will compare the values in the student's variable A against the reference solution variable A. Values are considered equal if the value is either within +/- 10% of the reverence value OR +/- 0.01 of the reference value.

Tolerances can only be applied to numeric values, and the variable data type must be the same as the tolerance data type, or the tolerance is ignored.

Knowing that, can you explain what you mean when you say it has not worked?