How to write signature of custom GA functions? (Selection, Mutation, Crossover)

问题

It is hard for me to find Documentation on how to write signatures of my custom selection, mutation, crossover functions for Genetic Algorithm.

I can't figure out how ga() functions works. (I know this exists: link ), but how these functions communicate, what they are expecting for inputs and for outputs?

Q&A, More about my problem: link

This are my GA options:

options = gaoptimset(...
                      'PopulationSize',    10, ...
                      'Generations',       50, ...
                      'CrossoverFcn',      {'crossoverscattered'}, ...
                      'MutationFcn',       { @Mutation, 0.01 }, ...
                      'SelectionFcn',      { @RouletteWheelSelection }, ...
                      'UseParallel',       true, ...
                      'Display', 'iter' ...
                     );

My GA function:

lb = 1;  % Lower bound on x
ub = 3;  % Upper bound on x
nvars = 1;
x = ga(@GaFitness,nvars,[],[],[],[],lb,ub,[],[],options);

My GaFitness Fcn signature (for now):

function result  = GaFitness()

My Mutation function signature:

 function chromosome  = Mutation( chromosome )

My Selection function signature:

function selected_chromosome = RouletteWheelSelection( population )

If you need more info about my problem or more code, pls let me know.

This is Error I'm getting:

Error using GaFitness

Too many input arguments.

Error in createAnonymousFcn>@(x)fcn(x,FcnArgs{:}) (line 11)

fcn_handle = @(x) fcn(x,FcnArgs{:});

Error in makeState (line 47)

            firstMemberScore = FitnessFcn(state.Population(initScoreProvided+1,:));

Error in galincon (line 17)
state = makeState(GenomeLength,FitnessFcn,Iterate,output.problemtype,options);

Error in ga (line 374)
            [x,fval,exitFlag,output,population,scores] = galincon(FitnessFcn,nvars, ...

Caused by:
    Failure in initial user-supplied fitness function evaluation. GA cannot continue.

Using Matlab 2016b.

来源：https://stackoverflow.com/questions/56759269/how-to-write-signature-of-custom-ga-functions-selection-mutation-crossover

标签

matlab

genetic-algorithm