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MathGroup Archive 2004

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Re: Remove["Global`"] ??

  • To: mathgroup at smc.vnet.net
  • Subject: [mg48004] Re: Remove["Global`"] ??
  • From: Bill Rowe <readnewsciv at earthlink.net>
  • Date: Wed, 5 May 2004 08:11:09 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

On 5/4/04 at 1:08 AM, siegman at stanford.edu (AES/newspost) wrote:

>In article <c72eaf$pj$1 at smc.vnet.net>,
>Bill Rowe <readnewsciv at earthlink.net> wrote:

>>I am guessing you are trying to remove all symbols from the
>>Global` context. If so, should have typed Remove["Global`*"]
>>instead of what you did type.

>I'm in the habit of putting  Remove["Global`*"]  as the first
>expression in the first evaluatable cell of my notebooks, so that
>reevaluations of the entire notebook produce a (more or less) clean
>start.

>In earlier versions of Matheamtica, this did not produce an error. 
>In later versions it produces an error on the first evaluation of a
>freshly opened notebook.  The workaround is to use  x;
>Remove["Global`*"] instead.

I can understand the desire to start with a more or less clean slate. In fact, there is a package available on the Wolfram web site called CleanSlate that I use to do just this. I have this package loaded at the start of every Mathematica session using init.m.

It has an advantage over Remove["Global`*"] in that it restores the session to the state it was when the package was loaded. This allows me to set global variables I commonly use in init.m and not have them removed when I restore things to my standard startup condition.
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