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Re: How to use BlockMatrix

• To: mathgroup at smc.vnet.net
• Subject: [mg73096] Re: How to use BlockMatrix
• From: Alois Steindl <Alois.Steindl at tuwien.ac.at>
• Date: Fri, 2 Feb 2007 05:11:19 -0500 (EST)
• Organization: Inst. f. Mechanics II, TU Vienna
• References: <eps72g$7ob$1@smc.vnet.net>

"T.Sariyski" <tsariysk at craft-tech.com> writes:

> Hi,
> I want to use BlockMatrix. Here is an example:
> 
> a11={a0};
> a12={a1,a2};
> a21={a3,a4};
> a22={{i,j},{k,l}};
> BlockMatrix[{{a1,a12},{{a21},a22}}]//MatrixForm
> 
> Out: 
> AppendColumns[AppendRows[a1,{a1,a2}],AppendRows[{{a3,a4}},{{i,j},{k,l}}]]
> 
> What I'm doing wrong here? 
> Thanks, Ted

Hello,
could you display the structure, that you expect? 
Carefully look at the substructures, that you use in your construct.
BTW, you define but do not use a11.

Alois