Matrix construction

*To*: mathgroup at smc.vnet.net*Subject*: [mg101059] Matrix construction*From*: Haibo Min <yshdfeng at gmail.com>*Date*: Tue, 23 Jun 2009 07:03:43 -0400 (EDT)

Hi, everyone. I know that matrix can be constructed via Table or Array, but I want to construct a matrix from other matrices, how to do it? For example, suppose I would like to construct a matrix M which is composed of four matrices, A,B,C,D. The element corresponding to the first row and the first column is A, the first row and second column is B... I used the M={{A,B},{C,D}} and M={A,B,C,D}, but both of them didn't work. How? Thanks for advance. Best Regards, Haibo

**Follow-Ups**:**Re: Matrix construction***From:*Haibo Min <yshdfeng@gmail.com>

**Re: Matrix construction***From:*Leonid Shifrin <lshifr@gmail.com>