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MathGroup Archive 2007

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Re: StringReplace

  • To: mathgroup at smc.vnet.net
  • Subject: [mg77796] Re: [mg77759] StringReplace
  • From: DrMajorBob <drmajorbob at bigfoot.com>
  • Date: Sun, 17 Jun 2007 06:00:47 -0400 (EDT)
  • References: <25940858.1181980912272.JavaMail.root@m35>
  • Reply-to: drmajorbob at bigfoot.com

The FullForm (or InputForm) of the original sum is:

"\!\(\*UnderoverscriptBox[\(\[Sum]\), \(i = 1\), \(n\)]\) f[i])"

and that, unfortunately, contains more than one "n".

Bobby

On Sat, 16 Jun 2007 02:26:55 -0500, Bruce Colletti <vze269bv at verizon.net>  
wrote:

> Re Mathematica 6.0 under WinXP.
>
> Create variable X by:
>
> - Punching the summation button in the BasicMathInputPalette
>
> - Filling in the blanks:  index i goes from 1 to n, with term f[i]
>
> - Enclose the whole thing between double quotes, thus making X a string  
> variable (or so I thought)
>
> Now I want to replace n by 3, and so enter:
>
>      StringReplace[X,"n"->"3"]
>
> The output includes a pink box that replaces the sigma and its bounds.  
> Thankfully, the f[i] appears.
>
> What causes this output and how can I get X to appear, although with n 
> replaced by 3?
>
> Thanks.
>
> Bruce
>
>
>



-- 
DrMajorBob at bigfoot.com


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