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MathGroup Archive 1997

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Re: Using subscripts in variable _names_!!!

  • To: mathgroup at smc.vnet.net
  • Subject: [mg6256] Re: [mg6104] Using subscripts in variable _names_!!!
  • From: Jason Harris <jasonh>
  • Date: Mon, 3 Mar 1997 01:29:11 -0500
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Guy,

In article <5elugs$3g6 at smc.vnet.net>, delamart at bullwinkle.pas.rochester.edu
(Guy Delamarter) wrote:

> My department has finally purchased and installed Mathematica 3.0 and
> I was looking forward to using variable names that LOOKED like the
> variables I use in and read from technical documents.  However, it
> appears that Mathematica assumes that subscripts are array indicies.
> I would gladly give up the ability to use subscripts as array
> addressing and use square brackets instead, if I could then use
> subscripts to denote unique names.For example, I would like it so R_{sub}
>is a
> totally independent variable from R_{x}.

I wrote the Notation package that ships with Mathematica 3.0. It will allow
you to easily do this. There is a demonstration of the package under the
help browser Demos -> Notation Maker.

You load the package with <<Utilities`Notation`

Just see the documentation and you will see how to symbolize R\_x Then it
is a simple matter to use this in a definition e.g.

\!\(f[R\_x : _] := g[R\_x]\)

You really need WYSIWYG email to read this :) but just paste it into
Mathematica and it looks nice.

There is an update to the Notation package which is about to be announced
by me at http://wolfram.com/~jasonh/Notation.html (The code is complete but
the documentation might change a little.)

Cheers,

   Jason




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