x=-5*w^4+10*w^2-1
z=y*w^2+w^6-10*w^4+5*w^2
这个图怎么画啊？
w = linspace(0, 2*pi);
x = 10.*w^2-5.*w.^4-1;
xmin = min(x); xmax = max(x);
y = linspace(xmin, xmax);
z = y.*w.^2 +w.^6-10.*w.^4+5.*w.^2;
figure;
plot3(x, y, z, 'r.')
[x1, w1] = meshgrid(x, w);
[y1, w2] = meshgrid(y, w);
z1 = y1.*w2.^2 +w2.^6-10.*w2.^4+5.*w2.^2
figure;
mesh(x1, y1, z1)
这样画出来和书上的不一样  大家帮我看看啊
程序应该怎么改啊

[ 本帖最后由 daxiaqie 于 2009-9-3 10:17 编辑 ]