hi, guy!
that's no so easy. if u want to be the best, u may take several courses, or read several special books. :((
the simplest way( but still not the best), find the orthogonal polynomials of x'……
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这货是老外?
hi, guy!
that's no so easy. if u want to be the best, u may take several courses, or read several special books. :((
the simplest way( but still not the best), find the orthogonal polynomials of x's first, and then, project y's onto each basis, then you will get an approximation, usually much better than that derived from the LS method.
good luck!