Re: vector multiplication
- To: mathgroup at smc.vnet.net
- Subject: [mg25537] Re: vector multiplication
- From: "Hans Staugaard" <hans.staugaard at get2net.dk>
- Date: Sat, 7 Oct 2000 03:35:41 -0400 (EDT)
- References: <8rjjdh$ofq@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hello
First I make a sample matrix:
In[1]:=
v = Array[Plus, {5, 3}]
Out[1]=
{{2, 3, 4}, {3, 4, 5}, {4, 5, 6}, {5, 6, 7}, {6, 7, 8}}
Then pick out the diagonal elements:
In[2]:=
Tr[Transpose[v].v, List]
Out[2]=
{90, 135, 190}
Hans
<Yannis.Paraskevopoulos at ubsw.com> wrote in message
news:8rjjdh$ofq at smc.vnet.net...
> 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.
>
> Thanks a lot in advance for your effort.
>
> yannis
>
>
> Visit our website at http://www.ubswarburg.com
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