How to save "optimoptions" to a file?

Is there a way to save "optimoptions" to a txt file? I tried the code below but it is not working. I also tried "dlmwrite" and "writetable". Thanks for the help.

fid = fopen('GA_Results.txt','wt+');
fprintf(fid,'%s', GA_Opts);
fclose(fid);

Answer 1

[Star Strider]

I have never tried that.

I would save it to a .mat file. Then load it when you need it.

[MByk]

Thanks for the answer. I'm actually saving the optimization results to "GA_Results" txt file using "writematrix" command. That's why I wanted to save the optimoptions to the same txt file. I think I can save both the results and optimoptions using "save" command to a mat file.

[Star Strider]

As always, my pleasure!

When I tried this:

PopSz = 500;
Parms = 6;
opts = optimoptions('ga', 'PopulationSize',PopSz, 'InitialPopulationMatrix',randi(1E+4,PopSz,Parms)*1E-3, 'MaxGenerations',2E3, 'PlotFcn',@gaplotbestf, 'PlotInterval',1);
Q1 = sprintf('%s', opts)

the result was:

Error using sprintf
Unable to convert 'optim.options.GaOptions' value to 'char' or 'string'.

With that in mind, I opted to suggest:

save('Test_Options_Save.mat', 'opts')

then with:

Q2 = load('Test_Options_Save.mat')

the result was:

Q2 = 

  struct with fields:

    opts: [1×1 optim.options.GaOptions]

to be certain that it worked.

It does.

[MByk]

That's exactly the same error I got but using "save" command and saving to a mat file works perfectly. You can save both variables (GA results and optimoptions) in one call. There is also an example with txt files in the document page, it is working but it is impossible to read the txt file.

save('GA_Results.mat','GA_Opts','GA_Results') 

[Star Strider]

Thank you!

For some problems .mat files are the only option.