Avoid chromosome to have duplicate genes (JGAP)

Question

I am using JGAP as the api to set my GA app. In my chromosome some times there are duplicate integer values set as alleles. I am using the basic random generator to get the random values from a desired range. I want to avoid the genes to be the same integer in the chromosome. Any idea how i can fix this

Answer 1

I suppose you are talking about generating the initial population of the GA, and what you want to do is to create many random orders of a certain value list.

There are many ways to do so, here's two possibilities:

• Create an array of all the possible values, shuffle it, copy it to a new chromosome, repeat... (you can assign a random real value to each possible value, then order the values by the random value).
• Put all the values in a list, select a random item from the list, remove it and add it to the chromosome until there are no more values in the list, repeat...