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Re: request for help in my search project with JGAP

by Klaus Meffert-5 :: Rate this Message:

Amirat,

for making a custom crossover or mutation operator, you have to implement your own class for crossover (copy org.jgap.impl.CrossoverOperator to another class and modify it, then set it in your configuration; do the same for class org.jgap.impl.MutationOperator).

--> 1. remove all standard operators via conf.getGeneticOperators().clear() (conf is an instance of class org.jgp.Configuration)

--> 2. add your custom operators by calling conf.addGeneticOperator(yourOperatorInstance) for your crossover and your mutation operator each.

Looking at the examples provided should help a lot in understanding how to configure JGAp appropriately (see package examples).

Best

Klaus
www.klaus-meffert.com

From: Amirat Hanane [mailto:djanahana@...]
Sent: Monday, May 07, 2012 11:30 PM
To: jgap-users@...
Subject: [jgap-users] request for help in my search project with JGAP

Good morning

I’am a student in a doctorial school and I’m preparing a paper this month (if GOD willing of course)

I have a few questions if you don’t mind

In my program I will

1- Generate initial population and a defaultConfiguration //where my chromosomes is an array of CompositeGene ,each composite Gene is a list of IntegerGene ,and I think this is OK

2- Fix a CrossOver rate

3- Choose a random number V between(0,100)

4- If (V<Crossover Rate) then we not will apply the crossover operator
Else we will apply the crossover

How can we make that the crossover will not be in an iteration ??

5-Fix the mutation rate

*Choose a random number M between (0,100)

6- If (M< Mutation Rate) then we will not apply the mutation operator

Else we will apply the mutation (choose a random number of chromosomes to mutate, a random choice of chromosome,a random choice for the CompositeGene, a random choice of Gene in the CompositeGene that it was choose )

Can you please tell me how to do this ??is it the way of mutation in CompositeGene???

Am I need to specify my own operator, I took a look on the javadocs but I didn’t find a lot of information about mutation in the case of CompositeGene ???

I feel lost with Operate,doCrossover,applygeneticOperator,…… I really don’t know what’s the appropriate in my case ???

As a selector I will use “WeightedRouletteSelector “,when I made

conf.addNaturalSelector(new WeightedRouletteSelector(conf), false);

I apply this selector, that’s it??or I need an applyOperator???

My last question is how to say that a chromosome will be one of the next generation ?is it automatically when we make

For(int i=0;i<nbr_iteration;i++){Genotype.evolve();}

sorry for my english ,i am trying to improuve my skills

Best regards

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« Return to Thread: request for help in my search project with JGAP