计算多维正态分布的概率密度值，给出均值和方差矩阵

计算多维正态分布的概率密度值，给出均值和方差矩阵-Multidimensional normal distribution calculate the probability density values, given the mean and covariance matrix

用于求解两个及以上随机变量的联合概率密度，可以画出概率分布的显示图-To solve two or more random variable of the joint probability density, can draw probability distribution shown FIG