Problem with adding a chromosome containing values equal zero

[vladimir nejkov]

Hi!

I use the JGAP library.
For my optimization problem, I use the DefaultConfiguration and invoke gaConf.setSampleChromosome(sampleChromosome);
where sampleChromosome is
IChromosome sampleChromosome = new Chromosome(gaConf,
                  new IntegerGene(gaConf, 0, 89), chromeSize);

I want the program to add a solution chromosome to the population. I do it this way for genes with allele equal zero:

Gene[] genes = new Gene[chromeSize];                   
for (int i = 0; i < chromeSize; i++) {
    Gene gene = new IntegerGene(gaConf);
    Integer integerValue = new Integer(0);
    gene.setAllele(integerValue);
    genes[i] = gene;
}
genotype.getPopulation().addChromosome(new Chromosome(gaConf, genes));


Here is my problem:
-If I set the allele value for all genes in the chromosome to zero, I get in the method evaluate() in the input array sometimes a negative entry, namely -1 , although I have configured the value range (0,89) of the genes' alleles.



If I add a solution with gene alleles all different from zero, the problem doesn't appear, the evaluate method gets values only from 0 to 89.

It does not matter, whether I keep the population size constant or not.

Is the described problem a bug in JGAP? Did I implement or understand something wrong?

Thank you for your answer.

Best wishes,
Vladimir Neykov

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[Klaus Meffert-5]

Vladimir,

 

I wonder if you get a -1 as a fitness value or -1 as gene value. You mentioned an evaluate() method. What is done there?

 

Why do you want to add a solution chromosome and when do you do this (before evolving, during...)?

 

Best

Klaus
www.klaus-meffert.com

 

---

From: jgap-users-bounces@... [mailto:jgap-users-bounces@...] On Behalf Of Vladimir Neykov
Sent: Tuesday, May 06, 2008 4:55 PM
To: JGAP Group
Subject: [jgap-users] Problem with adding a chromosome containing valuesequal zero

Hi!

I use the JGAP library.
For my optimization problem, I use the DefaultConfiguration and invoke gaConf.setSampleChromosome(sampleChromosome);
where sampleChromosome is
IChromosome sampleChromosome = new Chromosome(gaConf,
                  new IntegerGene(gaConf, 0, 89), chromeSize);

I want the program to add a solution chromosome to the population. I do it this way for genes with allele equal zero:

Gene[] genes = new Gene[chromeSize];                   
for (int i = 0; i < chromeSize; i++) {
    Gene gene = new IntegerGene(gaConf);
    Integer integerValue = new Integer(0);
    gene.setAllele(integerValue);
    genes[i] = gene;
}
genotype.getPopulation().addChromosome(new Chromosome(gaConf, genes));


Here is my problem:
-If I set the allele value for all genes in the chromosome to zero, I get in the method evaluate() in the input array sometimes a negative entry, namely -1 , although I have configured the value range (0,89) of the genes' alleles.



If I add a solution with gene alleles all different from zero, the problem doesn't appear, the evaluate method gets values only from 0 to 89.

It does not matter, whether I keep the population size constant or not.

Is the described problem a bug in JGAP? Did I implement or understand something wrong?

Thank you for your answer.

Best wishes,
Vladimir Neykov

---

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-------------------------------------------------------------------------
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Don't miss this year's exciting event. There's still time to save $100.
Use priority code J8TL2D2.
http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
_______________________________________________
jgap-users mailing list
jgap-users@...
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