多项式拟合的MATLAB工具。只要具有以下几个函数 POLYFITN - A general n-dimensional polynomial fitting tool POLYVALN - An evaluation tool for polynomials produced by polyfitn POLYN2SYMPOLY - A conversion tool to generate a sympoly from the results of polyfitn POLYN

Least-square curve fitting using polynomials is probably the most basic way to perform some parametric regression analysis. Foor basic tools for polynomial curve fitting are provided here. I also strongly recommend the exhaustive function POLYFITN

POLYFITN - A general n-dimensional polynomial fitting tool

What follows are example usages of polyfitn, polyvaln, poly2sympoly, polyn2sym

polydern: partial derivatives of a n-dimensional polynomial model created by polyfitn. usage: pout = polydern(p,diffvar)- polydern: partial derivatives of a n-dimensional polynomial model created by polyfitn. usage: pout = polydern(p,diffvar