2DInterpolation
Hi all,
I need to perform twodimensional interpolation from nonrectangular grid to other nonrectangular grid. Would you help me with algorithm? 
Re: 2DInterpolation
2 steps:
1. interpolate nonregular grid values to a regular grid 2. interpolate to get the other nonregular grid values from the regular grid 
Re: 2DInterpolation
The simplest method is to just do bilinear interpolation from the first nonuniform grid onto the points in the second grid. The algebra is a bit tedious but straightforward. This method doesn't care if the second grid is uniform or not. However, things get much harder if you have special requirements, such as high accuracy, a function that is not smooth, or you need to match some constraint such as conserving mass when you interpolate a density field.

Re: 2DInterpolation
you can try least square in 2d. it can satisfy the accuracy's requirement

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