Rv: three-d contour plot(intensity or arrow plot)

every time i try to plot i have these error
how can i avoid it?
Traceback (most recent call last):
File “C:/Python24/contour.py”, line 9, in -toplevel-
import matplotlib.axes3d as p3
File “C:\PYTHON24\lib\site-packages\matplotlib\axes3d.py”, line 26, in -toplevel-
import art3d
File “C:\PYTHON24\lib\site-packages\matplotlib\art3d.py”, line 17, in -toplevel-
import proj3d
File “C:\PYTHON24\lib\site-packages\matplotlib\proj3d.py”, line 21, in -toplevel-
cross = nx.cross
AttributeError: ‘module’ object has no attribute ‘cross’

----- Mensaje reenviado ----

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De: yadin Bocuma Rivas <conra2004@…9…>
Para: matplotlib-users@…1735…sourceforge.net; vtkusers@…1732…
Enviado: domingo, 23 de septiembre, 2007 21:06:50
Asunto: three-d contour plot(intensity or arrow plot)

hi !
I have an array of x,y,z 100 points(in tree-d) and at each point i have a correspoinding magnitude(of electric field) i want to generate a contour plot of these (intensity and if posible arrowsat every point)
how can i do these please any thing to start…
an example will be very helpfull


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