用于实现方差计算和画图 我用MATLAB编的程序，存为txt文档格式，方便大家查看。这是我们组在学校国际赛选拔赛时编的程序，用于实现方差计算和画图。可立即执行。-Variance calculation and graphics used to implement I use MATLAB code of the program, saved as txt file format to enable easy viewing. This is our group in the school when the series of international competitions qualifying procedures for the realization of the variance calculation and graphics. Can be implemented immediately.