有助于新手学习，帮助学习Mix-Copula原理，注释简单明了，希望有用(It helps the beginners to learn, helps to learn the Mix-Copula principle, the annotations are simple and clear, and they hope to be useful.)

运用MATLAB进行混合copula函数的参数计算，基于em估计(Using MATLAB to calculate the parameters of mixed copula function, based on EM estimation)