Fit surface to large data set

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ph0t0n
ph0t0n 2015-3-16
回答： ph0t0n 2015-3-16
I have a matrixe (size approx. 3000x3000) which includes z values of a surface. The values are very noisy and include NaN values (approx 10% of all values). What is the best way to find a fitted surface in matlab without the fitting toolbox?. The surface should be of the form ax^2 + by^2 + cx+ dy + exy + f.

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回答（2 个）

Meghana Dinesh
Meghana Dinesh 2015-3-16
Hey,
You can see Plane fit by Adrien Leygue. I have used this in my algorithms too for data-sets of approximately the same size.
Regards,
Meghana.
ph0t0n
ph0t0n 2015-3-16
thank you, Meghana, but a plane is not the best approximation for my surface. Does anyone know a method which allows quadratic terms ax^2 + by^2 + cx+ dy + exy + f as a surface model.

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