"Too many output arguments" error while working with the fmincon solver inside the optimization tool.

Question

Yagiz Dereboy 2021-9-11

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1451229-too-many-output-arguments-error-while-working-with-the-fmincon-solver-inside-the-optimization-tool

评论： Yagiz Dereboy 2021-9-12

Explenation after the code.

% Set nondefault solver options
options2 = optimoptions('fmincon','PlotFcn','optimplotfvalconstr');
% Solve
[solution,objectiveValue] = fmincon(@objectiveFcn,w,[],[],[],[],[],[],...
    @objectiveFcn,options2);
% Clear variables
clearvars options2

These are at default.

function f = objectiveFcn(optimInput)
x = optimInput(1:8124);
y = optimInput(8125:end);
f = -sum(1./(1+exp(-x))*1./(1+exp(-y')),'all');
end
function [c,ceq] = constraintFcn(optimInput)
x = optimInput(1:8124);
y = optimInput(8125:end);
c = sum(1./(1+exp(-x))*1./(1+exp(-y')).*(1.-aa),'all') - 0.1;
ceq = [];
end

vector w is passed for optimInput which is a 8243*1 vector. aa variable inside the constraint is a 8124*119 matrix. I am getting the error too many output arguments. How should I model something like this?

2 个评论
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Jan 2021-9-11

Please post the complete error message, not just a part of it. Then the reades can see, where the problem occurs. We cannot run your code because w is missing.

Yagiz Dereboy 2021-9-12

Oh ok thanks for the heads up. But may I ask how could I have shared a variable?

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Answer 1

Jan 2021-9-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1451229-too-many-output-arguments-error-while-working-with-the-fmincon-solver-inside-the-optimization-tool#answer_785369

在 MATLAB Online 中打开

A bold guess:

[solution,objectiveValue] = fmincon(@objectiveFcn,w,[],[],[],[],[],[],...
    @objectiveFcn,options2);
%   ^^^^^^^^^^^^^ This should be "constraintFcn" ?!