Re: column * row ??
- To: mathgroup at smc.vnet.net
- Subject: [mg28850] Re: column * row ??
- From: phbrf at t-online.de (Peter Breitfeld)
- Date: Tue, 15 May 2001 00:59:24 -0400 (EDT)
- References: <9dlcc6$o2p@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
J.R. Chaffer <jrchaff at mcn.net> schrieb:
> Hi there,
>
> Can someone tell me a way to mimic the building of
> an N x N matrix by multiplying a column vector
> on left times a row vector on right ? (both vectors
> of length N) - I mean in Mathematica, of course.
>
> i.e, want the result,
>
> (colvec){a1,a2, .. aN} * (rowvec){b1,b2,..bN} =
>
> result is matrix:
>
> {{a1*b1 a1*b2 ..... a1*bN},
> {a2*b1 a2*b2 ..... a2*bN},
> ... ... ... ,
> {aN*b1 aN*b2 ..... aN*bN}}
>
John,
try Outer[Times, colvec, rowvec]
Gruß Peter
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