Grader says answer Verified in Reference Solution is wrong

% define the limits of the for loop
forbeg=1;
forend=5;
for i = forbeg:forend
%   Compute velocity (m/s) for each row 
    U = manning(n(i),S(i),B(i),H(i));
    %output input and output 
    fprintf('%8.3f %8.3f %6d  %8.2f %8.3f \n', n(i),S(i),B(i),H(i),U)  
end

When I try to validate this reference solution testing the value of the variable forend, I get the errror

'Unable to resolve the name referenceVariables.forend'

Here is the code for testing the function:

assessVariableEqual('forend', referenceVariables.forend,toleranceAbsolute,0.0001);

Answer 1

[Cris LaPierre]

It doesn't appear that you've shared all your code, as I get an error about n being undefined. Obviously, that will be true for S, B, H and U as well. I'll assume they are actually defined in your code.

Yout name-value pair for tolerance is incorrect as well. The correct name is AbsoluteTolerance. However, since you are just applying the default tolerance of +/- 0.0001, it is actually unnecessary (unless you only want to apply an absolute tolerance and ignore relative tolerance).

Once I simplify everything to be just a test for forend, it works just fine. If you are still having the same issue, can you please share all of your code?

% reference solution
forend=5;

% MATLAB Code assessment
assessVariableEqual('forend', referenceVariables.forend);

Here's a screenshot of the result of validating the simplified problem in Grader.