       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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