Quote:

> I was wondering if anyone has written a Pascal routine for polynomial

> (quadratic) curve fitting of an x-y data set? If so, I'd deeply

> Thanks,

> - Matt Warfel

Hi

Have you had a look at 'Numerical recipes for Pascal'? They have a load

of fitting routines (and other math for that matter). The library should

have it (or it's equivalent in C or fortran, which would be more of a

hassle because of translation).

I would look there first, also because their routines _seem_ pretty well

tested (including rounding problems...). They also give a nice

introduction covering the some of the pitfalls in computer mathematics,

like precision, rounding, cumulation of errors, ...

Good luck.

Remco