Re: Don't want to calculate scalar product

*To*: mathgroup at smc.vnet.net*Subject*: [mg19737] Re: Don't want to calculate scalar product*From*: "Richard Finley" <rfinley at netdoor.com>*Date*: Mon, 13 Sep 1999 02:41:03 -0400*References*: <7ree45$489@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Toshi, use the Mathematica function Outer... regards, RF Toshiyuki (Toshi) Meshii wrote in message <7ree45$489 at smc.vnet.net>... >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 > > >