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Re: Is it a bug?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg17564] Re: Is it a bug?
  • From: paulh (P.J. Hinton)
  • Date: Mon, 17 May 1999 02:14:22 -0400
  • Organization: Wolfram Research, Inc.
  • References: <7hgdfs$4bu@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

In article <7hgdfs$4bu at smc.vnet.net>, "F. Mittermayr" <mitterma at linz.vai.co.at> writes:

> A = {1 + Sqrt[2] I , 1 + 2 * 3 I};
> Cases[A, _Complex]
> 
> Out[1] = {1+6 I}
> 
> Isn't it a strange result?

No.  When in doubt, look at the FullForm of the expression.

In[3]:= FullForm[A]

Out[3]//FullForm= 
 
>   List[Plus[1, Times[Complex[0, 1], Power[2, Rational[1, 2]]]], 
 
>    Complex[1, 6]]

The first element in your list has a head of Plus.

--
P.J. Hinton	
Mathematica Programming Group		paulh at wolfram.com
Wolfram Research, Inc.			http://www.wolfram.com/~paulh/
Disclaimer: Opinions expressed herein are those of the author alone.


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