Re: Clear, Remove variables
- To: mathgroup at smc.vnet.net
- Subject: [mg76966] Re: Clear, Remove variables
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 31 May 2007 03:14:11 -0400 (EDT)
- Organization: Uni Leipzig
- References: <f3jh9p$ded$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi, due to the internal structure a subscripted symbol is stored as Subscript[x,1] and not as xAnyChracter1 and the values are associated with Subscript[] and not with x, i.e. Subscript[x,1]=4 is a down value to Subscript[] and not to x. You can clear Subscript[] and this will remove all values associated with subscripted variables or you can associate the assigmet x/: Subscript[x,1]=4 and it will be in the UpValues[] of x and now you can clear x to remove the value. You can do what Symbolize[] does and setup a new symbol, that is read and printed as Subscript[x,1] but is internal stored as x\[SomeLetterYouWillNeverUse]1 and clear this symbol. Regards Jens Miguel wrote: > In version 6.0, I can not to clean variables with subscripts by Clear > or Remove. Why?. > > Can I to copy and to use the package Utilities`SubscriptSymbols`of 5.2 > version in 6.0 version? > >