Re: Re: Row vs. Column Vectors (or Matrices)

*To*: mathgroup at smc.vnet.net*Subject*: [mg33948] Re: [mg33936] Re: Row vs. Column Vectors (or Matrices)*From*: "Eric L. Strobel" <fyzycyst at comcast.net>*Date*: Wed, 24 Apr 2002 01:22:01 -0400 (EDT)*Reply-to*: fyzycyst at mailaps.org*Sender*: owner-wri-mathgroup at wolfram.com

I think the point was that a Dot product was desired. And a point of advice... Just remember, due to the way Mathematica deals with matrices (and particularly column vectors), there are often extra sets of braces surrounding results. Generally not a problem, until you try to get at a particular matrix element -- depending upon how one does it, you may have to 'peel the onion' several layers down. (Asthetically, I find these artifacts a tiny bit annoying. I don't suppose there's an automatic way of shedding them, is there?) At the risk of making this reply too broad, is there any recent progress on the front of *symbolic* matrix algebra/calculus?? I'm aware of NCAlgebra, and while it is a workable stopgap I guess, there ought to be something better, given that this has been a known inadequacy of Mathematica for many years now. - Eric. on 4/23/02 7:14 AM, Adam Smith at adam.smith at hillsdale.edu wrote: > See if the following is what you want > *** Demonstration of Outer Product removed *** > > Note that MatrixForm is such a so-called wrapper that essentially just > changes the way things display on the screen. > > It is not necessary to put the 2nd vector in a 1-column format due to > the construction of the Outer[] function. > > John Resler <John-Resler at kscable.com> wrote in message > news:<aa05ug$25i$1 at smc.vnet.net>... >> Hi, >> I'm new to Mathematica and am doing a little linear algebra. I am >> aware of the MatrixForm[m] >> function but I know of no way to create a row vector eg. [ 1.0 2.0 3.0 >> ] * [ 1.0 >> >> 2.0 >> >> 3.0]. >> >> Can someone point me in the right direction? Thanks ahead of time. >> >> -John > -- Eric Strobel (fyzycyst at NOSPAM^mailaps.org) ===================================================================== There is never a single right solution. There are always multiple wrong ones, though. =====================================================================