Customising creation function in GA optimisation tool

Bus route network design problem aims to find an optimal set of routes that satisfies a predefined objective and a set of constraints. This is to be optimized using genetic algorithm. If an initial population of N individuals is to be formed from a set of routes stored as a cell array, is it possible to customize the genetic algorithm optimization tool in Matlab for this?

[Brendan Hamm]

Yes, See the Initial Population options. Once you have read through these and determine what your Initial population is, you can use it by creating your optimoptions structure.

IP = ... % Population MAtrix goes here
options = optimoptions('ga','InitialPopulationMatrix',IP);

x = ga(fitnessfcn,nvars,A,b,Aeq,beq,LB,UB,nonlcon,options)

Answer 1

[Alan Weiss]

This example might give you ideas on a possible approach. It is not a direct solution to your problem, but I think it shows that the approach is workable.

Alan Weiss

MATLAB mathematical toolbox documentation

[Hari]

Will the initial population be always stored as a matrix in matlab of size m x n where m is the population size and n the number of elements in an individual?

[Alan Weiss]

You don't have to give a complete initial population. In other words, m can be smaller than the population size. See Initial population.

Alan Weiss

MATLAB mathematical toolbox documentation