Why the assessment shows the keyword not presented however it is in the code in the MATLAB grader?

In MATLAB Grader, I set up the reference solution, added two assessment, one to check the keywords' presence and the other check the results. Then I run the same answer code in the learner's view and submit the answer, the assessment showed that the keywords missing and results wrong, which is not the case by the code nor the results. What happened wrong?

e.g. Code: z=sort(x,'descend')

In Assessment: 1. check if keywords used: sort, descend

2. check if the variable z is the same as in the reference solution

Even if the code are correct and z is correct, the auto-assessment shows "descend" is missing and the result is not correct.

Answer 1

[Cris LaPierre]

The reason is that descend is not a function or keyword. It is an input argument to the sort function.

exist('descend')

ans = 0

iskeyword('descend')

ans = logical
   0

[Sihe Zhang]

Thanks! So the property argument can not be a "keyword"? What should I do if I would like check if the descend is used in the syntax in MATLAB grader as one of the assessment?

also, the z matrix that is generated is the same matrix as been generated in the reference solution code, however it can not pass the test.

Thanks for your help.

[Cris LaPierre]

There is curently no built-in way to assess function inputs. However, you could code your own test in a MATLAB Code test type. The code would have to import the learner's script as text and then parse through the text to see if descend is used.

Without knowing how x is created in the reference and learner solutions, it is impossible to say why z is being marked as incorrect.

[Bryan González Lobos]

Do you know how to import learner's script to Matlab Grader?

[Cris LaPierre]

Yes. See here: https://www.mathworks.com/help/matlabgrader/ug/assessfunctionpresence.html#d124e8641