Re: Contour plots [Was: Re: [Matplotlib-users] how to make matplotlib faster?]

[Chris B. <Chr...@no...>]

LUK ShunTim wrote:
> As it's being implemented, here is a little wish. I'd like to see the 
> capability of contouring on an arbitrary grid. That is, matplotlab would 
> be able to plot the contours of a function f(x_i, y_i) given on an 
> arbitrary set of points (x_i, y_i), not necessarily set out on a regular 
> grid.

This would be nice, but it's a bit of a project. One way to do it would 
be to Delaunay triangulate the points, then you can compute the contours 
from the triangular grid. Delaunay triangulation is not trivial, and you 
really want to use an efficient scheme to do it. One possibility is:

http://www-2.cs.cmu.edu/~quake/triangle.html

It is very robust and fast, and can be compiled as a library. I've been 
planning for ages to write a Python wrapper for it, but haven't gotten 
to it yet.

If someone works on this, I'd like to help.

-Chris

-- 
Christopher Barker, Ph.D.
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Chr...@no...