Re: subscripts in function definitions
- To: mathgroup at smc.vnet.net
- Subject: [mg105046] Re: subscripts in function definitions
- From: "Sjoerd C. de Vries" <sjoerd.c.devries at gmail.com>
- Date: Thu, 19 Nov 2009 05:22:23 -0500 (EST)
- References: <he0nki$48t$1@smc.vnet.net>
You can do this using the Notation package. The function you need is Symbolize. Look it up in Notation/tutorial/ NotationSymbolizeAndInfixNotation. Please note the last paragraph about the use of the colon (:) notation. Cheers -- Sjoerd On Nov 18, 2:00 pm, Murat Tasan <mmu... at gmail.com> wrote: > hi, folks - i'm not very savvy with Mathematica, so i apologize in > advance if this is a silly question, but: > > i'd like to define a function, say f, that takes the symbol Subscript > [x,L]_. > > it's hard to replicate what i'm typing here, without the ability to > subscript, but basically i want an x with a subscript of L as the > entire variable. something like xL (only with the L sub-scripted). > > when i try to enter this as a pattern in the function definition by > adding the trailing underscore, it attaches only to the L (in the > subscript), not to the whole x_L variable (thus making the pattern > only match "L"). if i move out of the subscript box and try to add > the trailing underscore at the "x" level, it becomes detached from the > whole expression. so i tried creating the pattern explicitly, as so: > > f[Subscript[x,L]_] := myfun > > but also in this case the trailing underscore becomes non-associated > with the Subscript expression. > > is there any way i can make x with a subscript of L the entire pattern > for a variable? > > (hopefully this made some sense... hard to make clear what i'm > searching for in plain text!)