Interpolation of non-regular matrices

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Matilda
Matilda 2014-7-7
回答： Shashank Prasanna 2014-7-7
Hello,
I have a problem when interpolating non-regular matrices. I have three non-regular matrices (size 20x20), Z, Y, X and a function where x = f(z,y). What I want is to find the value x depending on value y and z in a non-regular grid.
I have now tried to solve the problem, by using Griddata, which interpolates the matrices to find a matching x to y and z. The problem is that, the error turn out to be big, since the data is non-regular.
Is there a better way to find x?
Thank you for your help.
Kind regards
Matilda

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回答（1 个）

Shashank Prasanna
Scattered Interpolation is the way to go:
http://www.mathworks.com/help/matlab/math/interpolating-scattered-data.html
If the results are bad, you may want to try different methods: linear, cubic, natural, nearest etc

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