MATLAB提供了各种曲线拟合方法，例如：Exponential, Fourier, Gaussing, Interpolant, Polynomial, Power, Rational, Smoothing Spline, Sum of Functions, Weibull等，当然，也可以使用 Custom Equations. cftool不仅可以绘制拟合后的曲线、给出拟合参数，还能给出拟合好坏的评价参数(Goodness of fit)如SSE, R-square, RMSE等数据，非

利用牛顿迭代解决webull分布的极大似然估计的问题(Using Newton iteration to solve the maximum likelihood estimation of Webull distribution)

用于Weibull分布概率密度函数拟合林分直径分布的代码，对其进一步的分析有一定的帮助！(The code of Weibull distribution probability density function fitting forest stand diameter distribution has certain help to its further analysis!)