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MathGroup Archive 2001

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Re: Extracting the name of a variable

  • To: mathgroup at smc.vnet.net
  • Subject: [mg26895] Re: [mg26883] Extracting the name of a variable
  • From: Andrzej Kozlowski <andrzej at tuins.ac.jp>
  • Date: Fri, 26 Jan 2001 23:29:42 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Presumably you mean something like this:


In[1]:=
SetAttributes[ExtractNameAndValue, HoldFirst]

In[2]:=
ExtractNameAndValue[z_Symbol] :=
  With[{u = z}, SymbolName[Unevaluated[z]] <> "=" <> ToString[u]]

In[3]:=
z = 5;

In[4]:=
ExtractNameAndValue[z]

Out[4]=
"z=5"
?

-- 
Andrzej Kozlowski
Toyama International University
JAPAN

http://platon.c.u-tokyo.ac.jp/andrzej/
http://sigma.tuins.ac.jp/


on 01.1.26 3:27 PM, Mike Yukish at may106 at psu.edu wrote:

> Hello,
> 
> I'd like to make a function that extracts the name of a variable and
> makes a string. So the function would do:
> 
> In:  z = 4
> 
> In: nameExtract[z]
> 
> Out: "z"
> 
> It appears to not be so simple, since once you assign z a value, the
> function SymbolName[z] returns an error. what's the trick?
> 
> I want to do this so I can make a function takes z as an argument, and
> generates a name:value pair  "z=4"
> 
> 
> 




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