Re: Multiply a constant to a matrix column
- To: mathgroup at smc.vnet.net
- Subject: [mg16285] Re: Multiply a constant to a matrix column
- From: Paul Abbott <paul at physics.uwa.edu.au>
- Date: Sun, 7 Mar 1999 01:05:26 -0500
- Organization: University of Western Australia
- References: <7bo0gg$dop@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hyo ahn wrote:
> I would like to multiply a constant number to a certain column of an existing
> matrix in Mathematica and I am having a hard time.
>
> First, I have a 1000 x 3 matrix A. There is no command that allow me to
> multiply a constant number to a specific column (let say I want to multiply
> 100 to the second column),
Here are two ways:
[1] {1, 100, 1} # & /@ A
[2] Transpose[Transpose[A] {1, 100, 1}]
Cheers,
Paul
____________________________________________________________________
Paul Abbott Phone: +61-8-9380-2734
Department of Physics Fax: +61-8-9380-1014
The University of Western Australia
Nedlands WA 6907 mailto:paul at physics.uwa.edu.au
AUSTRALIA http://www.physics.uwa.edu.au/~paul
God IS a weakly left-handed dice player
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