unc_n2_treccaniplot.m

来自「it contains many classic Test Problems f」· M 代码 · 共 27 行

lb=-3;
ub=3;
teix=0.01;
[X,Y] = meshgrid(lb:teix:ub);
Z=X.^4+4*X.^3+4*X.^2+Y.^2;
mesh(X,Y,Z)
axis([lb ub lb ub 0 300]);

title('unc#n2#treccani');
xlabel('x');
ylabel('y');
zlabel('z')


% %contour
% lb=-3;
% ub=3;
% teix=0.1;
% [X,Y] = meshgrid(lb:teix:ub,lb:teix:ub);
% Z=X.^4+4*X.^3+4*X.^2+Y.^2;
% v=[  0 0.01 0.1 0.5 1.0 2  6.0 10 100];
% [c,h]=contour(X,Y,Z,v);
% clabel(c,h);
% title('unc#n2#treccani');
% xlabel('x');
% ylabel('y');