Least square software for a function F(x, y)

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Posted by M. Rahman on May 12, 1998 at 11:04:35:

Hi there:

For some research matters, I am in dire need of a software
for least square approximation of a given function of two variables
F(x, y) in terms of a polynomial of x and y, i. e.
F(x, y) has to be approximated as ao+a1 x+a2 y+a3 x^2+a4 x y+a5 y^2+...
Could any one give me a hint as to where I can find a code realizing this?

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