# 2D-Interpolation

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 October 4, 2003, 05:14 2D-Interpolation #1 Don Tron Guest   Posts: n/a Hi all, I need to perform two-dimensional interpolation from nonrectangular grid to other nonrectangular grid. Would you help me with algorithm?

 October 4, 2003, 12:37 Re: 2D-Interpolation #2 xueying Guest   Posts: n/a 2 steps: 1. interpolate nonregular grid values to a regular grid 2. interpolate to get the other nonregular grid values from the regular grid

 October 4, 2003, 13:54 Re: 2D-Interpolation #3 TPallidum Guest   Posts: n/a 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.

 October 30, 2003, 04:40 Re: 2D-Interpolation #4 autofly Guest   Posts: n/a you can try least square in 2d. it can satisfy the accuracy's requirement

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