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MathGroup Archive 1999

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Re: Q: ReplaceAll with pattern in pattern

  • To: mathgroup at smc.vnet.net
  • Subject: [mg18517] Re: [mg18459] Q: ReplaceAll with pattern in pattern
  • From: "Andrzej Kozlowski" <andrzej at tuins.ac.jp>
  • Date: Thu, 8 Jul 1999 22:32:54 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

Just use //. (ReplaceRepeated) instead of /. (Replace).
-- 
Andrzej Kozlowski
Toyama International University
JAPAN
http://sigma.tuins.ac.jp
http://eri2.tuins.ac.jp


----------
>From: handel at hrzpub.tu-darmstadt.de (Christoph)
To: mathgroup at smc.vnet.net
>To: mathgroup at smc.vnet.net
>Subject: [mg18517] [mg18459] Q: ReplaceAll with pattern in pattern
>Date: Wed, Jul 7, 1999, 1:11 PM
>

>  howdy,
>
> At the top of a notebook i want to define some constants like that:
>
> shorts={a -> b^2,d -> a/f}
> values={b -> 42,f -> 27}
>
> and now i want to do some calculations using a,b,d,f as symbols:
>
> matrix={{a,b},{d,f}}
>
> and now I need to show the matrix:
>
> matrix //MatrixForm
>
> and now I want to know numerical values.
>
> matrix /.shorts /. values
>
>
> but this won't do the job. When the shorts are done, there are still
> some a left, because they were introduced with the second replacement
> rule. Is there any way to do things like that?
>
> Greetings
>  Christoph
>
> PS: Mathematica 3.0 on NT
> PPS: please also use eMail to reply


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