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Re: IsIntegerOrFloat

  • To: mathgroup at
  • Subject: [mg87063] Re: [mg87011] IsIntegerOrFloat
  • From: Andrzej Kozlowski <akoz at>
  • Date: Sun, 30 Mar 2008 01:19:04 -0500 (EST)
  • References: <>

One possibility is:

IsIntegerOrFloat[expr_] :=
  VectorQ[expr, NumberQ[#] && (Head[#] =!= Rational) && (Head[#] =!=  
Complex) &]


IsIntegerOrFloat[{2.3, 5}]

IsIntegerOrFloat[{2.3, 1/2}]

and so on.

Andrzej Kozlowski

On 29 Mar 2008, at 10:21, carlos at wrote:
> Thanks to all who replied to my previous questions. Those functions  
> work
> fine now. Here is another question - I apologize if it has been  
> asked before.
> I need a function
>                 IsIntegerOrFloat[expr]
> that returns True if expr, which is generally a flat list, contains
> only integers or floating point numbers, and False otherwise.
> Rational numbers such as 1/2 are considered symbolic for this test;  
> so is
> \[Pi] or Sqrt[5]. Appearance of any symbol, as in 2.0*a+3.5, makes  
> it False.
> As in previous questions, this should work on versions >=4.0.
> Use: unified printing of simulation data structures in table formats.
> Expressions containing only integers or floats are filtered through
> PaddedForm[] and ToString[], others through Symbol[].  The end
> result (a flat table of strings) is filtered through TableForm with
> appropriate options.

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