Output Argument not assigned during call

Good afternoon everyone,

I've been tasked to create a fairly simple code (which I've done for the most part). The code always gives the correct answers, however the grader that I must submit to presents this error:

Output argument "MaxPower" (and maybe others) not assigned during call to "MaxPowerSolver".

function MaxPower = MaxPowerSolver(ElectricalData)

Power = ElectricalData(:,2).*ElectricalData(:,3);
MaxPower = max(Power);

end

Where Electrical data is given by [t,v,i] ([time, voltage, current]).

I can't seem to work this one out after googling and researching other people's similar problems.

Please help, thank you for your time.

[Bhaskar R]

It does not give any error. You are assigned output variable MaxPower in MaxPowerSolver call

[Jesse Swanson]

I'm aware that it doesn't give an error through Matlab, I guess it must be the grader that is causing the issues, thank you for your help.

[Walter Roberson]

Somehow it is grading some other version of your code. Make sure you do not have any other function of the same name that it could be finding.

[Peter O]

Yeah, you're certainly assigning the value to MaxPower. A couple of possibilities strike me:

Are you actually calling this particular function? Is it perhaps shadowed by something else on the path that has a different output assignment? Type:

which MaxPowerSolver

Or Is it potentially in the calling function? If it also calls a variable MaxPower but forgets to assign it, perhaps you're seeing an error meant for a different file? (e.g. its handling assigns to "maxPower" or "MaxPowe" by mistake.) Something maybe like:

function MaxPower = evalInputFunction(func, e_data)
    %
    MaxPowe = func(e_data) % This is the actual failure point
end

load the_data
passfail = zeros(1,numel(test_functions))
for ix = 1:numel(test_functions)
    fx = test_functions(ix)  % Your MaxPowerSolver is test_function(17), for instance
    Pmx = evalInputFunction(fx, the_data)
    if Pmax == Correct_P
        passfail(ix) = 1
    end

Answer 1

[Piyush Lakhani]

Hi Jesse,

The error you had mentioned will occured only in the case when the output Variable "MaxPower" is not assigned in the function but as i can see it should work fine.

You may try following function.

function MP = MaxPowerSolver(ElectricalData)
Power = ElectricalData(:,2).*ElectricalData(:,3);
MP = max(Power);
end

[Jesse Swanson]

Thank you for your help, unfortunately this didn't resolve my issue as I believe it might be the automatic grading system which is at fault. Thank you for your time though.