Genetic Algorithm Plotter does not display

Question

Khaled Mohamed 2021-10-22

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1569758-genetic-algorithm-plotter-does-not-display

评论： Walter Roberson 2021-10-23

Hi

I'm using the ga optimizer to find some parameters. However, the bestfit plot does not show up at all.

I used this code from the help section

%% Fit options
opts=optimoptions('ga','FunctionTolerance', 1E-9,'MaxGenerations',5000000,'MaxStallGenerations',500000,'HybridFcn','patternsearch', ...
   'PlotFcn',{@gaplotbestf,@gaplotchange},'PopulationSize',500,'FitnessLimit',-inf,'MigrationDirection','both');
%% Optimizer
%       Do       a       ro     
lb = [  0   ;    0    ;  0 ];
ub = [  Inf ;   3.0   ; 5.0 ];
f=@(param_vec) e_and_r_vals(param_vec)
[best_fit_param,fval,exitflag,output,population,scores] = ga(f,3,[],[],[],[],lb,ub,[],opts)

Also the below does not show the plot

%% Fit options
opts=optimoptions('ga','FunctionTolerance', 1E-9,'MaxGenerations',5000000,'MaxStallGenerations',500000,'HybridFcn','patternsearch', ...
   'PlotFcn','@gaplotbestf','PopulationSize',500,'FitnessLimit',-inf,'MigrationDirection','both');
%% Optimizer
%       Do       a       ro     
lb = [  0   ;    0    ;  0 ];
ub = [  Inf ;   3.0   ; 5.0 ];
f=@(param_vec) e_and_r_vals(param_vec)
[best_fit_param,fval,exitflag,output,population,scores] = ga(f,3,[],[],[],[],lb,ub,[],opts)

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Answer 1

Walter Roberson 2021-10-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1569758-genetic-algorithm-plotter-does-not-display#answer_814438

opts=optimoptions('ga', 'FunctionTolerance', 1E-9, 'MaxGenerations', 5000000, 'MaxStallGenerations', 500000, 'HybridFcn', 'patternsearch', ...
   'PlotFcn', @gaplotbestf, 'PopulationSize', 500, 'FitnessLimit', -inf, 'MigrationDirection', 'both');

You can specify the plot function by name (character vector or string scalar) or by handle. You cannot specify the plot function by character vector that looks sort of like a handle. @gaplotbestf or 'gaplotbestf' not '@gaplotbestf'