How to create a contour graph?

Question

How to create a contour graph as follows: contour http://www.fz-juelich.de/vislab/software/gsharp/Gsharp/userguide/interpolate/ex6.gif

It's easy enough if the points are on a regular grid, but what if they are not the same as in my example? Is there a simple algorithm for determining the color for each pixel?

Answer 1

Maybe a little late

however, in newer versions of matplotlib you can get grid data:

http://www.scipy.org/Cookbook/Matplotlib/Gridding_irregularly_spaced_data

maybe it helps

Answer 2

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Answer 3

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Answer 4

. , , Matlab pcolor, . , pcolor - , (0,90).

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pcolor- , delaunay , trisurf. ...

tri = delaunay(x,y);
trisurf(tri,x,y,z)
view(0,90)

Admittedly, this solution will not give you a beautifully circular color domain in the original image. This will require other, more complex solutions. But since I'm not sure whether the solution I put above will be acceptable, I will stop here for now.

Answer 5

See 2D interpolation. There are some simple algorithms, but they may not work as well (or spend a lot of time computing).