MATLAB: I am trying to find the root mean square error(RMSE) but i am getting this error when I tried to find the output in command window ‘Unrecognized function or variable ‘Hot_Output’.

matlab r2020bunrecognized function or variable

function [OBJ] = Main_Combined_optimization(Opt_Param)

%% code Description: Main optimization Function

%%Run Model with optimization Parameters

global hot;

Data = xlsread('hotspot.csv');

hot.RecordingTime = Data(:,1);

hot.Loading = Data(:,2);

hot.HotToTopOilGradient = Data(:,3);

t = hot.RecordingTime;

K = hot.Loading;

Hot_Output = hot.HotToTopOilGradient;

%% call the optimizer

[HotSpotTemperture_Optimization] = Combined_Optimization(K,Opt_Param,t);

error_HT = Hot_Output – HotSpotTemperture_Optimization;

OBJ_HT = sum( trapz(t, error_HT.^2));

OBJ = OBJ_HT;

%% Calculate the RMSE

RMSE = sqrt( sum((Hot_Output(:)- HotSpotTemperture_Optimization(:)).^2) / numel(Hot_Output) );

end

Best Answer

That's a question of variable scope. Variables declared in a function are only visible within the function that declared it.

If you want to use that data after execution of the function, make it an output variable. If you just want to have a look at it for debugging, set a breakpoint in your function (go at this line: [HotSpotTemperture_Optimization] = Combined_Optimization(K,Opt_Param,t); where Hot_Temperature is already assigned.), then you will see all the variables in the workspace window.

Cheers

Manuel

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