How to execute GA properly?

Hello, I am trying to use the Genetic algorithm from the Optimization toolbox. I receive following error for both my code and for example code called Run ga from a File included in the Matlab help.

Here is the error:

Undefined function 'ga' for input arguments of type 'optim.options.GaOptions'.

Error in go_ga (line 43)
    [x,fval,exitflag,output,population,scores] = ga(@get_fitness_v1,nvars,[],[],[],[],LB,UB,[],options);

Here is part of my code:

      % GA SETTINGS AND EXECUTION
      options = optimoptions('ga','PopulationSize', PopulationSize,...
                                  'InitialPopulationMatrix', InitialPopulation,...
                                  'MaxGenerations',MaxGenerations);
      [x,fval,exitflag,output,population,scores] = ga(@get_fitness_v1,nvars,[],[],[],[],LB,UB,[],options);
      out = [x,fval,exitflag,output,population,scores];

Thank you in advance. Best regards JC

[Geoff Hayes]

Jan - which version of MATLAB are you using? Or, from the command line type

 >> doc ga

to see what is the function signature for ga.

Also, which example are you running - one from the web or one from your version of the toolbox?

[Jan Cagan]

Hi Geoff,

I am using Matlab R2016b. I have already read the documentation, but there must be something that I overlooked.

The example "Run ga from a File" from Matlab documentation which has the same error is following:

options = optimoptions('ga','MaxGenerations',300,'Display','none');
rng default % for reproducibility
record=[];
for n=0:.05:1
  options = optimoptions(options,'CrossoverFraction',n);
  [x,fval]=ga(@rastriginsfcn,2,[],[],[],[],[],[],[],options);
  record = [record; fval];
end

Thank you for kind help.

JC

[Geoff Hayes]

Jan - as per Walter's answer, ga is part of the Global Optimization Toolbox. Do you have this? From the command line, what does

 which ga -all

return?

[Jan Cagan]

Ok, now i understand, here is the reason:

>>  which ga -all
C:\Program Files\MATLAB\R2016b\toolbox\globaloptim\globaloptim\ga.m  % Has no license available

I thought that I have full school Matlab license :-(, but reality is in another place.

Thank you very much.

JC

[Walter Roberson]

The Student Suite does not include Global Optimization Toolbox; that has to be added on.

Answer 1

[Walter Roberson]

ga is not part of the Optimization Toolbox: it is part of the Global Optimization Toolbox.