Re: Matrix Manipulation
- To: mathgroup at smc.vnet.net
- Subject: [mg16473] Re: [mg16389] Matrix Manipulation
- From: Jurgen Tischer <jtischer at col2.telecom.com.co>
- Date: Sat, 13 Mar 1999 02:22:08 -0500
- Organization: Universidad del Valle
- References: <199903110716.CAA12344@smc.vnet.net.>
- Sender: owner-wri-mathgroup at wolfram.com
APF,
mm[[ {1,3} , {1,3} ]]=msub
Jurgen
Andreas Paul Friedrich Bernhard wrote:
>
> I am trying to modify the elements of a submatrix in a matrix, without
> having to replace each element explicitly
>
> for example:
> mm = { {1,2,3}, {4,5,6}, {7,8,9} }
> msub = { {21,22}, {23,24} }
> I now wish to add the sub matrix: to positions (1,1),(1,3),(3,1),(3,3)
>
> I have tried using ReplacePart but it does not recognize the
> multidimensional replacement, I have also tried
> mm[ {{1,3} , {1,3}} ] = mm[ {{1,3} , {1,3}}] + msub
>
> but this crashes horribly
>
> Thanks
> AndyIII
>
> --
> -------
> What is man without the beasts, If all the beasts were gone,
> Man would die from great loneliness of Spirit.
> For whatever happens to the beasts, soon happens to man. - Chief Seattle
> -------
>
> ****************************************************
> * Andreas P.F. Bernhard *
> * Aerospace Department, University of Maryland *
> * College Park, MD 20742 *
> * bernhard at Glue.umd.edu *
> * Fax: (301) 314-9001, Tel: (301) 405-1141 *
> ****************************************************
- References:
- Matrix Manipulation
- From: Andreas Paul Friedrich Bernhard <bernhard@eng.umd.edu>
- Matrix Manipulation