Good posts those two. The second is http://blog.stata.com/2011/03/09/understanding-matrices-intuitively-part-2/ http://blog.stata.com/2011/03/09/understanding-m

Good posts those two. The second is http://blog.stata.com/2011/03/09/understanding-matrices-intuitively-part-2/ http://blog.stata.com/2011/03/09/understanding-matrices-intu....