ga_fextra2.m

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function PI=GA_fextra2(x)
% Fitness function evaluation
% chro is the array transfered from GA for optimization.

% PenChen Chou, 2003-11-12

global MIN_offset MUL_factor

% Always to set MAX_factor=1, if you have no idea about
% the meaning of MAX_factor at the first time.
if exist('MUL_factor','var'), 
    if isempty(MUL_factor), MUL_factor=1; end
end

% Fitness function evaluation
y=100-x;
PI=x*y;
if (x-y)<5, PI=PI-100; end;

% attached_part is used to transfer a minimization problem
% into a maximization problem. Input is PI, Output is PI.
attached_part;