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MathGroup Archive 1996

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Re: How to mutiply a 3x1 and 1x3 vector

  • To: mathgroup at smc.vnet.net
  • Subject: [mg3081] Re: [mg3068] How to mutiply a 3x1 and 1x3 vector
  • From: "Dennis M. Schneider" <dschneid at knox.edu>
  • Date: Wed, 31 Jan 1996 03:02:07 -0500
  • Sender: owner-wri-mathgroup at wri.com

{{1},{2},{3}}.{{3,4,5}}

or

Transpose[{{1,2,3}}].{{3,4,5}}

Dennis M. Schneider
Knox College


On Tue, 30 Jan 1996, Stephen Nichols wrote:

> 
> Hi,
> 
> I have another question that I thought would be simple to to in Mathematica.
> I have two vectors A={1,2,3} and B={3,4,5}.  How do I multiple them together
> to get a 3x3 matrix.  A . B gives me a scalar result.  Mma seems to always
> treat the first one as a row vector and the second as a column vector.  I
> need it to do the opposite.  Treat the first as a column vector and the second
> as a row vector.  Any ideas?
> 
> thanks,
> 
> 
> 

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