How to make output function for multiobjective genetic algorithm optimisation tool?

I am using optimisation tool to optimise the multiobjective problem using genetic algorithm and I want to store the values of variables at each iteration, for storing the values, I have to define an output function using custom option. So how to define that function?

Answer 1

[Alan Weiss]

ga custom output functions are described here. The fields in the state structure are described here.

You want the state.Population field at each iteration. Save this in a matrix variable, adding rows each time, such as

totalpop = [totalpop;state.Population];

Alan Weiss

MATLAB mathematical toolbox documentation

[RAVITA LAMBA]

Thanks Alan Weiss for your help.