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。-The matlab programs are the　mapping analysis of three probability distribution (t, f, chi-square) .In the program, the distribution of different parameters are mapped . you can directly see the different parameters curve.