puppet_love的专栏

转自：http://wiki.pinggu.org/doc-view-3301.html The Kendall tau rank correlation coefficient (or simply the Kendall tau coefficient, Kendall's τor tau test(s)) is a non-parametric statistic used to me

Source :http://www.quuxlabs.com/blog/2010/09/matrix-factorization-a-simple-tutorial-and-implementation-in-python/ By Albert Au Yeung on September 16, 2010 There is probably no need t

Source: https://www.zhihu.com/question/20473040?utm_campaign=rss&utm_medium=rss&utm_source=rss&utm_content=title 向量范数 1-范数： ，即向量元素绝对值之和，matlab调用函数norm(x, 1) 。 2-范数： ，Euclid范数（欧几里得范数，常用计算向量