Re: Don't want to calculate scalar product
- To: mathgroup at smc.vnet.net
- Subject: [mg19740] Re: [mg19708] Don't want to calculate scalar product
- From: Jean-Marie Thomas <jmt at agat.net>
- Date: Mon, 13 Sep 1999 02:41:05 -0400
- Organization: TeA
- References: <199909112036.QAA04471@smc.vnet.net.>
- Sender: owner-wri-mathgroup at wolfram.com
Try this :
rowVector=Array[a,3]
columnVector=Array[{b at #}&,3]
Outer[Times,columnVector,rowVector]
Hope this helps,
jmt
On Sat, 11 Sep 1999, Toshiyuki (Toshi) Meshii wrote:
> Hi,
>
> I understand that one of the unique point of Mathematica is that you don't
> have to be conscious about whether a vector is a "row" or a "column" vector.
>
> However, I think there is a case in which you have to specify whether you
> want Mathematica to recognize a vector as a row vector or a column vector.
> Let me explain my case.
>
> a={1,2,3}; b={4,5,6}
>
> I want to define "a" as a column vector (3x1 matrix) and "b" as a row vector
> (1x3 matrix).
>
> I expect the product
> a.b
> as a 3x3 matrix, but the answer Mathematica gives is a scalar product "32".
>
> Please give me an advice to get the 3x3 matrix as a product.
>
> -Toshi
- References:
- Don't want to calculate scalar product
- From: "Toshiyuki (Toshi) Meshii" <meshii@mech.fukui-u.ac.jp>
- Don't want to calculate scalar product