中文说明：本matlab程序对t，f，卡方三大概率分布进行绘图分析，绘制了每种分布不同参数下的曲线，可以直观的看出不同参数对不同分布的影响。
English Description：
This matlab program for T, F, chi square three probability distribution of the plot analysis, draw the curve of each distribution under different parameters, you can see the impact of different parameters on different distribution.