Re: subscripted variables
- To: mathgroup at smc.vnet.net
- Subject: [mg9778] Re: subscripted variables
- From: Bruce Wolk <bawolk at ucdavis.edu>
- Date: Fri, 28 Nov 1997 05:34:56 -0500
- Organization: University of California, Davis
- Sender: owner-wri-mathgroup at wolfram.com
William S. Graves wrote:
>
> I would like to use variables with subscripts just like any variable.
> There seem to be a couple of problems with evaluation.
>
> Problem 1) I would like to use a subscripted variable as a function
> argument, for example:
>
> In[1]= f = Function[{Subscript[t,i]}, Subscript[t,i]^2;
>
> Function::"flpar" :
> "Parameter specification {Subscript[t,i]} in
> Function[{Subscript[t,i]}, Subscript[t,i]^2] should be a symbol or list
> of symbols.
>
> Problem 2) Another problem with evaluation:
>
> In[1]= Subscript[t,i] = 1.0
> Out[1]= 1.
>
> In[2]= ?Subscript[t,i];
>
> Information::ssym:
> Subscript[t,i] is not a symbol or a string.
>
> How can I make these statements work???? Thanks,
> Bill Graves (wsgraves at bnl.gov)
The easiest solution is to use the Notation utility. You can load it
with
<<Utilities`Notation`
The documentation is in the Documentation subdirectory of the Utilities
subdirectory.