Pb Genetic algorithm

Dear all,

 I have a problem with the genetic algorithm in Matlab. I tried to create a custom function in order to save the "state" at each generation, but I have a lot of problems. By chance do you have an example of a code ?

Thank you very much,

Best regards,

Aymeric

Answer 1

[Alan Weiss]

There is a thread on CSSM addressing this issue: http://www.mathworks.com/matlabcentral/newsreader/view_thread/311708#849624

To quote my own answer there:

You can certainly write an output function. The basic syntax is here: http://www.mathworks.com/help/releases/R2010b/toolbox/gads/f6174dfi10.html#f17837

(There is an error in the description of the syntax in the R2011a documentation, sorry, that's why I am pointing to R2010b.)

For examples of using an output function (albeit with a different syntax than ga uses), see http://www.mathworks.com/help/techdoc/math/bsgpq6p-23.html#bsgpq6q-31 http://www.mathworks.com/help/toolbox/optim/ug/brhkghv-56.html

Alan Weiss MATLAB mathematical toolbox documentation

Answer 2

[aymeric]

Hi Alan,

Thank you for your message.

My function is:

optchanged=false

switch flag

case {'init'}

     store=zeros(1,1)

case {'iter'}
    store(state.Generation,1).details=state.Population
    save store

end

end

But I get just the population of the last generation. Do you have a function which save the state at each generation?

Thank you very much.

Aymeric