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I have 3D point cloud and I would like to fit a polynomial surface to it. Could anybody please explain the step by step process to that.

Thanks a lot.

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    It's easier to do what is called *stepwise regression* in two dimensions, yes. I don't know how that can be modified in the three-dimensional case, where for instance the quadratic terms to choose from are $x^2$, $y^2$, and $xy$ (and even more choices for higher-degree terms). Anyway, I've told you a term you can search on the Internet...2012-07-24

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