中文说明：已知一组数据，如何用matlab画出它的概率密度分布图，给出具体程序 并且得出分布图后，如何对图进行积分，进而得到分布函数
English Description：
Given a group of data, how to use matlab to draw its probability density distribution map, give the specific program and get the distribution map, how to integrate the graph, and then get the distribution function