RE: basic operations in matrices
- To: mathgroup at smc.vnet.net
- Subject: [mg34596] RE: [mg34542] basic operations in matrices
- From: "David Park" <djmp at earthlink.net>
- Date: Wed, 29 May 2002 02:45:14 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Christian,
Assuming you have Version 4.1...
mat1 = {{a, 1, 1, 1}, {2, b, 2, 2}, {3, 3, c, 3},
{4, 4, 4, d}};
Exchanges rows 1 and 3:
mat1[[{3, 2, 1, 4}]]//MatrixForm
Exchanges columns 1 and 3:
mat1[[All,{3, 2, 1, 4}]]//MatrixForm
David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/
> From: Christian Junk [mailto:junkc at fh-trier.de]
To: mathgroup at smc.vnet.net
>
>
> Hi!
>
> I'm new to Mathematica and I'm searching for an operation, that simply
> transpose two rows or columns of a matrix M.
>
> e.g:
>
> Operation[M,{1,3}]
>
> 1 1 1 1 3 3 3 3
> 2 2 2 2 ---> 2 2 2 2
> 3 3 3 3 1 1 1 1
> 4 4 4 4 4 4 4 4
>
> Much thanks in advance,
>
> Christian
>