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MathGroup Archive 1999

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Re: Function definition

  • To: mathgroup at smc.vnet.net
  • Subject: [mg18218] Re: Function definition
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 22 Jun 1999 20:41:12 -0400
  • Organization: Universitaet Leipzig
  • References: <7kmtmi$230@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

this depends on your understanding of "Real". If you mean it like a C
type
that is not possible you can restrict the head like

f[x_Real]:= ...

but it may be better use

f[x_?NumericQ]:= ..

so that f[1/2] and f[Pi] is also working.

Hope that helps
  Jens

Jesus Perez Ortega wrote:
> 
> Hi All,
> How can I restrict a variable to be Real in the function definition?
> Regards
> --
> Jesus Perez Ortega
> jesper at bqto.unexpo.edu.ve


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