On 9/17/10 9:08 PM, Fernando Perez wrote: > Hi Luke, > > On Fri, Sep 17, 2010 at 5:49 PM, Dale Lukas Peterson > <hazelnu...@gmail.com> wrote: >> >> I'm not sure I understand how I would make use of my function then. >> My function needs to be evaluated over a 3-d mesh (x, y, and z) , and then >> the >> level surfaces (not contour lines) calculated. I guess I could treat >> z as a parameter, then plot the zero level contour lines of my function for >> a discrete number of z values, but then I would need to adjust the >> height that each countour line is plotted at when I do the 3-d plot. >> This still would only give bunch of vertically stacked contour >> lines, rather than a nice smooth 3-d surface. >> >> If I'm misunderstanding what you meant, perhaps you could point me >> to an example of something that makes a level surface of a function >> of 3 (not 2) variables? > > You're looking for an isosurface; as far as I know matplotlib does not > have isosurface modules, only 2-d contours embedded in 3d (such as > those illustrated in > http://matplotlib.sourceforge.net/examples/mplot3d/contourf3d_demo.html). > > VTK does have powerful isosurface capabilities, nicely exposed by mayavi: > > http://code.enthought.com/projects/mayavi/docs/development/html/mayavi/auto/mlab_helper_functions.html#contour3d
Sage will also do this sort of thing, though it's not as powerful as VTK/Mayavi in this functionality: http://www.sagemath.org/doc/reference/sage/plot/plot3d/implicit_plot3d.html Here are lots of sheets on sagenb.org that use implicit_plot3d somewhere: http://sagenb.org/pub/?typ=pub&search=implicit_plot3d Thanks, Jason ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
