Re: Clearing selected variables
- To: mathgroup at smc.vnet.net
- Subject: [mg86630] Re: [mg86625] Clearing selected variables
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Sat, 15 Mar 2008 17:42:59 -0500 (EST)
- Reply-to: hanlonr at cox.net
Create variables and make assignments
ToExpression[Table["x" <> ToString[n] <> " = 1", {n, 20}]];
exclusions = {"x5", "x9", "exclusions"};
Verifying that assignments have been made
ToExpression[Names["Global`*"]]
{{x5,x9,exclusions},n,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
Clear all assignments except variables in exclusions
ToExpression[# <> "=." & /@ Complement[Names["Global`*"], exclusions]];
Verifying that appropriate assignments have been cleared
ToExpression[Names["Global`*"]]
{{x5,x9,exclusions},n,x1,x10,x11,x12,x13,x14,x15,x16,x17,x18,x19,x2,x20,x3,x4,\
1,x6,x7,x8,1}
Remove all variables except those in exclusions
ToExpression[
"Remove[" <> # <> "]" & /@ Complement[Names["Global`*"], exclusions]];
verifying that appropriate variables have been removed
Names["Global`*"]
{exclusions,x5,x9}
Bob Hanlon
---- pradeep <pradeep at purdue.edu> wrote:
> Hello All,
> is there a way i can selectively clear all but a few variables in
> mathematica?? i have a large number of variables and am iteratively
> running my entire notebook through a loop and want most variables except
> a few to get cleared between iterations..
> any help would be appreciated!
>
> thanks!
> Pradeep
> Purdue University
>