ga_ex20_demo.m

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% GA_ex20_demo.m file
% Fin max of a function of 1 varaible
% maximize f(x)=x*x,
%  0<=x<=10, 

% PenChen Chou, 7-1-2001
% Revised,      7-1-2002

clear all
ans=1;
who
fprintf('>>>Start this program [GA_ex20_demo.m] now. Please wait!\n');
pause(1)

global MIN_offset MUL_factor LOCUS 

MUL_factor=1;   % Set it to 1 for the time being.
                % MUL_factor must be a positive real number.
LOCUS=0;        % Set LOCUS to 1 if the independent variables
                % of the problem is 2 and you want to plot 
                % the 3-dim diagram, otherwise, set LOCUS=0;.

%**********************************************************/
%       User can modify the following in blocks
%**********************************************************/
MIN_offset=0;  % From the problem description above, max f(x,y)
                % is 22, so we set a rather large number such
                % as 25 to MIN_offset in this case.
                % We will use PI=MIN_offset-PI; statement later
                % to convert a MINIMIZATION problem to fit the
                % property of GA to a MAXIMIZATION one.
%--------------------------------------------------------------
%   IMPORTANT: If you handle a MAXIMIZATION problem, set
%              MIN_offset=0;
%--------------------------------------------------------------
obj_fcn = 'GA_f20';	% Objective function
% Range of the input variables x and y
range = [0     % LOWER BOUNDS
        10];	% UPPER BOUNDS
IC=[]; elite=1; 
gen_no=20;
% If you want more information from GA result, use the following:
popuSize=8;bit_n=12;
xover_rate=0.8; mutate_rate=0.05;
%************************************************************
% call GA_genetic
tic
[popu, popu_real, fcn_value, upper, average,...
     lower, BEST_popu, popuSize, gen_no, para, best_pi,...
     bit_n, xover_rate, mutate_rate]=...
GA_genetic(obj_fcn, range, IC, elite, gen_no, popuSize,...
     bit_n, xover_rate, mutate_rate);
t=toc/60;
fprintf('==>  Computation time is (%.2f) minutes.\n\n',t);            

% END OF THIS MAIN PROGRAM.