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"
>
>
>