MathGroup Archive 1999

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Re: Checking for non-complex numerics

  • To: mathgroup at
  • Subject: [mg20985] Re: [mg20983] Checking for non-complex numerics
  • From: Andrzej Kozlowski <andrzej at>
  • Date: Thu, 2 Dec 1999 21:41:02 -0500 (EST)
  • Sender: owner-wri-mathgroup at

NonComplex[x_] := Element[x, Reals] && NumericQ[x]
seems to satisfy your requirements:

Map[NonComplex, {Pi, 2.3, 2.3*I, b, Pi*I, E^(Pi)}]
{True, True, False, False, False, True}

> From: "DIAMOND Mark" <noname at>
> Organization: The University of Western Australia
> Date: Wed, 1 Dec 1999 01:50:56 -0500 (EST)
> To: mathgroup at
> Subject: [mg20985] [mg20983] Checking for non-complex numerics
> I would like a function that returns True for non-complex numerics only. To
> be more specific, anything that results in NumericQ returning True is OK,
> such as Pi, E, 1, -2.6.
> a=-1.5;
> followed by NonComplexQ[a] should return True. But
> NonComplexQ[b] and NonComplexQ[Pi I] should return False as should
> NonComplexQ[1.1 + 3 I].
> I have been able to a function that satisfies various subsets of these
> conditions, but not the whole lot ... yet it seems the kind of problem for
> which there should be a simple and obvious solution.

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