RE: Subscript[x, y] and the Symbol x

*To*: mathgroup at smc.vnet.net*Subject*: [mg33777] RE: [mg33770] Subscript[x, y] and the Symbol x*From*: "David Park" <djmp at earthlink.net>*Date*: Tue, 16 Apr 2002 03:50:26 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Curt, Ted Ersek has just put up a new package called SubscriptSymbols at MathSource. It will allow you to symbolize x_y. It works this way: Needs["Utilities`SubscriptSymbols`"] The following turns x_y into a symbol: \!\(SubscriptSymbols[{x\_y}, On]\) Now you can define your function. \!\(f[x_, y_] := x\_y\ + \ x + y\) f[2, 2] \!\(4 + x\_y\) Ted's package is easy to use and quite versatile. David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ > From: Curt Fischer [mailto:cfisher at bio.titech.ac.jp] To: mathgroup at smc.vnet.net > > > Dear Mathgroup: > > The Subscript function in Mathematica has no built-in meaning. What > definition can I give this function to allow me to use Subscript[x,y] as > a "stand-alone" symbol that is completely distinct from the Symbol x or > the Symbol y? For example: > > In[1]:= > \!\(f[x_, y_] := x\_y\ + \ x + y\) > > In[2]:= > f[2,2]//FullForm > > Out[2]//FullForm= > Plus[4,Subscript[2,2]] > > This is exactly what I don't want. Instead I want > Plus[4,Subscript[x,y]]. Is there a way to do this? > > Thanks for your help. > -- > Curt Fischer > Tokyo Institute of Technology > Dept. of Bioengineering > > > >