Optimization running. Error running optimization. Undefined function 'Cost_mini​mization_f​unction' for input arguments of type 'double'.

Optimization running.

Error running optimization.

Undefined function 'Cost_minimization_function' for input arguments of type 'double'.

What does this mean

[Alan Weiss]

Please show us the function call that led to this error message.

Alan Weiss

MATLAB mathematical toolbox documentation

[Shamir Sheikkariem]

%Objective function
function y = Cost_minimization_function(x) y = (x(1))*x(2); end

% Equality linear constraint 
function [c] = costContraints (x)
c = 13000 - (x(1)*x(2));
end

%Initialize optimization
ObjFcn = @Cost_minimization_function;
x0 = [20 5];                              % Initial input value for x1 and x2
nvars = 2;                                % Number of variables
lb = [1 2];                               % Lower bound
ub = [171 5];                             % Upper bound 
ConsFcn = @costContraints;                % Linear constraint function

rng default   
% For reproducibility
[x, fval, exitFlag, Output] = ga(ObjFcn,nvars,lb,ub,ConsFcn)
% Run Genetic Algorithm solver

Error using ga (line 356)
GA requires the following inputs to be of data type double: 'Aeq'.

Answer 1

[Naveen Venkata Krishnan]

Hello Shamir,

There is a mistake in the way you have implemented the 'ga' function . Change it to :

[x, fval, exitFlag, Output] = ga(ObjFcn,nvars,[],[],[],[],lb,ub,ConsFcn);