RE: Preserve subscripts like integers using N

• To: mathgroup at smc.vnet.net
• Subject: [mg31949] RE: [mg31932] Preserve subscripts like integers using N
• From: "Wolf, Hartmut" <Hartmut.Wolf at t-systems.de>
• Date: Fri, 14 Dec 2001 04:21:10 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

```> -----Original Message-----
> From: guillerm at usal.es [mailto:guillerm at usal.es]
To: mathgroup at smc.vnet.net
> Sent: Thursday, December 13, 2001 7:09 AM
> To: mathgroup at smc.vnet.net
> Subject: [mg31949] [mg31932] Preserve subscripts like integers using N
>
>
> I would like to preserve in the Outs the subscripts like
> integers using N in
> expression like this. How can I do?
>
> In[1]:=Thread[Table[Subscript[x, i], {i, 1, 3}]->{Pi,2 Pi, 3 Pi}]//N
>
> Out[1]:={Subscript[x, 1.] -> 3.141592653589793, Subscript[x, 2.] ->
>    6.283185307179586, Subscript[x, 3.] ->
> 9.42477796076938}
>
> ---------------------------------------------
> This message was sent using Endymion MailMan.
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>
>
>
You can prevent intrusion of N into the subscripts by
giving the appropriate attribute to Subscript:

In[3]:= Attributes[Subscript] = NHoldRest

In[4]:=
Thread[Table[Subscript[x, i], {i, 1, 3}] -> {Pi, 2 Pi, 3 Pi}] // N
Out[4]=
\!\({x\_1 -> 3.141592653589793`, x\_2 -> 6.283185307179586`,
x\_3 -> 9.42477796076938`}\)

The subscripted integers are preserved now.

Hartmut Wolf

```

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