Re: vector multiplication

• To: mathgroup at smc.vnet.net
• Subject: [mg25539] Re: vector multiplication
• From: Alberto Ruiz <ARuiz at um.es>
• Date: Sat, 7 Oct 2000 03:35:43 -0400 (EDT)
• Organization: University of Murcia, Spain
• References: <8rjjdh\$ofq@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Yannis, in Mathematica there is no difference between row and column vectors,
but you can use matrices: {{a,b,c}} is a row vector {{a},{b},{c}} is
a column vector.

You can also use Outer[Times,list1,list2] to get the product of
a column vector list1 and a row vector list2.

But note that the diagonal elements of the outer product of a vector
and itself is just v v (a vector with the elements squared).

Alberto

Yannis.Paraskevopoulos at ubsw.com wrote:
>
> Hi there,
>
> Could you please help me with the following:
>
> Assume the v is a vector (1xk). I would like to calculate the v'v and
> then take all the diagonal elements.
>

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