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Only real data

• To: mathgroup at smc.vnet.net
• Subject: [mg122120] Only real data
• From: Jörg Schröder <HB-Kowalczyk-Schroeders at t-online.de>
• Date: Sat, 15 Oct 2011 06:03:21 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Hello,



I have a problem to exclude complex solutions. I tried



data1={2,3/4,1.3,=E4}



{2,3/4,1.3,=E4}



Cases[data1, Except[_Complex]]



{2,3/4,1.3}



and got, what I expected. But when I have data like



{0,0,-I Sqrt[3],I Sqrt[3]}



The above doesn't work. Is this due to a different Head? Is there an easy
way to filter the non-complex data?



Thanks in advance



Greetings



Joerg



################

Dr. J=F6rg Schr=F6der

Bremen, Germany

• Follow-Ups:
  • Re: Only real data
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>
  • Re: Only real data
    • From: Heike Gramberg <heike.gramberg@gmail.com>