mayavi can only show a 3d image with axes

[aowenli]

This is my code:
`import numpy as np
import mayavi.mlab as mlab

x, y = np.ogrid[-2:2:20j, -2:2:20j]
z = x * np.exp( - x2 - y2)

pl = mlab.surf(x, y, z)
mlab.axes(xlabel='x', ylabel='y', zlabel='z')
mlab.outline(pl)
mlab.show()`
when I ran this code, I got this:

and this is the image:

I have no idea about it. Can anyone help me? thx!!!!

[prabhuramachandran]

What version of Mayavi is this? I suspect you have an old version. Can you try with the latest version?