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>