Re: col-vector * row-vector = matrix, how ?
- To: mathgroup at smc.vnet.net
- Subject: [mg18488] Re: col-vector * row-vector = matrix, how ?
- From: Harald Giese <giese at dkrz.de>
- Date: Wed, 7 Jul 1999 23:08:45 -0400
- Organization: Institut fuer Meereskunde, Universitaet Hamburg
- References: <7lumbd$leb@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Malte Lance wrote:
>
> Need to know how to accomplish the following in Mathematica-3.0:
>
> v1 := transpose(<a,b,c>) /* column-vector */
>
> v2 := <x,y,z> /* row-vector */
>
> ( ax ay az )
> ( bx by bz ) = v1 * v2 =: m /* 3x3-matrix */
> ( cx cy cz )
>
> Does anyone know how to do this in Mathematica ?
>
Hi Malte,
Here it comes:
v1 = {a, b, c}
v2 = {x, y, z}
v1v2 = Outer[Times, v1, v2]
Output for v1v2:
{{a x, a y, a z}, {b x, b y, b z}, {c x, c y, c z}}
Regards,
Harald
--
Harald Giese
Email: giese at dkrz.de
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