NLREG是一款强大地统计分析软件。能够进行线性和非线性回归分析，表面和曲线拟和。此款软件可以为一个方程决定其参数值，你可以指定方程。NLREG能够处理线性，多项式，指数，对数，周期性地，一般的非线性函数。 NLREG is a powerful statistical analysis program that performs linear and nonlinear regression analysis, surface and curve fitting. NLREG determines the values of parameters for an equation, whose form you specify, that cause the equation to best fit a set of data values. NLREG can handle linear, polynomial, exponential, logistic, periodic, and general nonlinear functions. Unlike many nonlinear regression programs that can only handle a limited set of function forms, NLREG can handle essentially any function whose form you can specify algebraically. http://www.nlreg.com