MATLAB: How to assess solutions with multiple correct answers in MATLAB Grader

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I recently received the following question about Grader assessments:

"I wasn't able to test a variable when there are two possible answers. So we have situations where depending on what assumptions the student makes they can have two possible correct answers for a variable. Both are correct as you can assume either way but matlab grader would only let me have one variable as correct."

Best Answer

You could consider using MATLAB code to develop a custom Test. The assessment code can create new variables that you could test with conditional statements. For example:

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MATLAB: How to offer students hints in Cody Coursework

A good way to provide hints to students is to use the msg input argument with assert in your test suites. For example, you could use this syntax for assert:

assert(cond,msg)

where

msg

is a string that contains your hint.

For details and examples, visit the MathWorks documentation for assert .

MATLAB: AssessFunctionPresence use in Matlab Grader for checking one out of n functions are present

The MATLAB Code assessment type allows you to use any code you want to create an assessment. There are ways to achieve the result you want with assessFunctionPresence combined with assessFunctionAbsence, since it is the combination that is important. For example

try
    assessFunctionPresence('while')
    assessFunctionAbsence('for')
catch
    assessFunctionPresence('for')
    try
        assessFunctionAbsence('while')
    catch
        assert(false,'You must use either a for loop or a while loop, but not both')
    end
end

Any time a test evaluates false, you are bumped to the next level of the try/catch. If the solution contains both for and while loops, the assert statement will mark the answer false and give the student meaningful feedback on how to correct the code.

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Related Solutions

MATLAB: How to offer students hints in Cody Coursework

MATLAB: AssessFunctionPresence use in Matlab Grader for checking one out of n functions are present

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