[SciPy-User] weighted griddata
Thu Sep 16 15:42:51 CDT 2010
Thu, 16 Sep 2010 20:27:46 +0000, Pauli Virtanen wrote:
> Data smoothing is a different problem than interpolation, and the
> algorithms in griddata cannot do it, and they are not easily modified to
> do it either.
No, I tell a lie, the Clough-Tocher 2D spline could easily be used for
weighed data smoothing. The only change needed would be to adjust the
gradient estimation routine so that instead of minimizing
it would allow for changes also in the data points, and would minimize
||weighed deviation from data points|| + ||surface curvature||
Interesting idea. I'll need to look up some literature before thinking
more about it -- this particular wheel must already be invented...
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