hmm.py 文件源码

def gauss2D(x, mean, cov):
    # x, mean, cov??numpy.array??
    z = -np.dot(np.dot((x-mean).T,inv(cov)),(x-mean))/2.0
    temp = pow(sqrt(2.0*pi),len(x))*sqrt(det(cov))
    return (1.0/temp)*exp(z)