clc
clear
close all
A =[ ];
b = [];
Aeq = [];
beq = [];
lb = [-3 ;-3];
ub = [3; 3];
x0=[2 2 ];
[xz,fval,exitflag,output,lambda]=fminimax(@permfun,x0,A,b,Aeq,beq,lb,ub);
x = -2:0.1:2;
y = -2:0.1:2;
[x,y] = meshgrid(x,y);
[m,n] = size(x);
b=0.5;
for ii = 1:m
for jj = 1:n
xx = [x(ii,jj) y(ii,jj)];
z(ii,jj) = permfun(xx, b);
end
end
zz = permfun(xz, b);
figure
surf(x,y,z)
hold on
plot3(xz(1),xz(2),zz,'ro','MarkerFaceColor','r')
hold off
xlabel('x1')
ylabel('x2')
zlabel('z')
legend('Perm曲面','最小值')
title('Fminmax最大最小优化')
axis([-2 2 -2 2 0 120])
zlabel('Perm Function')
set(gca,'fontsize',12)
colormap jet
view([192 27])
