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MathGroup Archive 2005

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Re: Clearing the definitions saved by using the "Save" command

  • To: mathgroup at smc.vnet.net
  • Subject: [mg56574] Re: Clearing the definitions saved by using the "Save" command
  • From: Peter Pein <petsie at arcor.de>
  • Date: Fri, 29 Apr 2005 03:20:46 -0400 (EDT)
  • References: <d4q2a9$olp$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

TingYF at gmail.com wrote:
> Hello All,
> 
> This is got to be a silly question but I just can't think of the right
> key words that can help me find a solution on this list.  I was trying
> to save the definitions and contents of variables by using the Save
> command, and I cannot find a way to clear what I have saved.
> 
> So now when I type
> 
> !!test
> 
> Mathematica gives the list of variables and definitions that I no
> longer need.  I tried ClearAll, quitting kernel, closing Mathematica and
> reopening it but none worked.  
> 
> Thanks a lot!
> 
> Carol
> 
Hi Carol,

!!test shows the contents of the file where you saved your definitions.
To get rid of it either delete it by mean of your OS or enter
DeleteFile[Directory[]<>"\\test"] in your Mathematica session.

To delete the definition assigned to a symbol either use
Clear[symbolname] or Remove[symbolname]

example:
In[1]:= f[x_] := Sin[Pi*x];
In[2]:= ??f
  Global`f
  f[x_]:=Sin[\[Pi] x]
In[3]:= Save["test", f]; Remove[f];
In[5]:= ??f
  Information::notfound: Symbol f not found. More...
In[6]:= !!test
From In[6]:=
  f[x_] := Sin[Pi*x]
In[7]:= DeleteFile["test"]
In[8]:= !!test
From In[8]:=
  General::noopen: Cannot open test. More...

-- 
Peter Pein
Berlin


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