中文说明：主要为数据分析和统计，基于K均值的PSO聚类算法,这个有中文注释，看得明白，这是一个好用的频偏估计算法的matlab仿真程序,计算一维光子晶体的透射特性和反射特性，该函数用来计算任意函数的一阶偏导数(数值方法)。
English Description：
Primarily for data analysis and statistics of PSO based on k-means clustering algorithm, the Chinese comments, understand it, and this is a frequency offset estimation algorithm for use of MATLAB simulation program, transmission properties of one-dimensional Photonic Crystal and the reflection characteristics of a first-order partial derivatives of the function used to calculate any function (method).