ga_gen_fp43.m

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function PI=GA_gen_fp43(chro)
% (Minimize) Fitness function evaluation 
% chro is the array transfered from GA for optimization.

% PenChen Chou, 2003-3-12

global MIN_offset MUL_factor c1 c2 c3 efactor
% Fitness function evaluation
x=chro(1); y=chro(2);
PI=-c1*exp(-c2*sqrt(0.5*(x^2+y^2)))-exp(0.5*(cos(c3*x)+cos(c3*y)))+c1+efactor;
% attached_part is used to transfer a minimization problem
% into a maximization problem. Input is PI, Output is PI.
attached_part;