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MathGroup Archive 2004

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Re: Boolean Type

  • To: mathgroup at
  • Subject: [mg52438] Re: [mg52415] Boolean Type
  • From: Selwyn Hollis <sh2.7183 at>
  • Date: Sat, 27 Nov 2004 01:40:36 -0500 (EST)
  • References: <>
  • Sender: owner-wri-mathgroup at

You've got it right in the Real case, although you might want


instead. If by 'boolean variable' you mean one that has values in 
{True, False}, then this will do the trick:

   f[x_?(MemberQ[{True, False}, #] &)]

Selwyn Hollis
(edit reply-to to reply)

On Nov 26, 2004, at 1:04 AM, JMyers6761 wrote:

> All,
> 	I would like to define a function wich would work (in different ways) 
> for both
> real and boolean input argruments. How should I best implement a 
> function which
> would implement the following intent?
> func[x_Real]:= some function involving a real varialble x
> func[x_Boolean]:= some function involving a boolean variable x
> Thanks for any help.
> Al Myers

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