xyqzki的专栏

RT

ref:eigen vectorhttp://www.quora.com/What-is-an-eigenvector-of-a-covariance-matrixgeometric interpretationhttp://www.visiondummy.com/2014/04/geometric-interpretation-covariance-matrix/好网站http://www.vis

参考http://www.cnblogs.com/jerrylead/archive/2011/05/11/2043317.htmlhttp://blog.youkuaiyun.com/puqutogether/article/details/43055633http://blog.youkuaiyun.com/puqutogether/article/details/40889719regression problem

variational EM: http://net.pku.edu.cn/~zhaoxin/vEMLDA.pdfEM: http://www.cnblogs.com/biyeymyhjob/archive/2012/07/21/2603020.html估计方法都是用的MLE, variational EM 估计α\alpha和β\beta(对应EM中的zz)，e而实际上也要求的是θ\theta

定义the smallest α\alpha in hypothesis test called p value.ref book : All of statistics from cmu, p156

For random variable X and Y, to measure the mutual dependence, more general than the correlation. MI is the expected value of the PMI