实现数据密度函数的画图以及数据密度轮廓的matlab程序- A matlab program to plot the data density and make a contour map of data density

写文章时常常遇到要画一个图，但有效信息只有一点点，中间有大量的0值，这时需要把坐标轴断开显示，本程序配合MATLAB的plot函数，能够实现美观化处理，是写文章的必备技巧！(When writing an article, you often encounter a picture to draw, but the effective information is only a little. There are a large number of 0 values in the middle.

一些matlab画图函数，比如plot之类的使用(Some set of drawing functions, practice using drawing, more intuitive learning drawing function, and the function is relatively easy to learn.)