Re: Only real data
- To: mathgroup at smc.vnet.net
- Subject: [mg122129] Re: Only real data
- From: Heike Gramberg <heike.gramberg at gmail.com>
- Date: Sun, 16 Oct 2011 07:04:59 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <201110151003.GAA03159@smc.vnet.net>
You could do something like
Select[data1, (ComplexExpand[Im[#]]===0)&]
Heike
On 15 Oct 2011, at 12:03, J=F6rg Schr=F6der wrote:
> Hello,
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> I have a problem to exclude complex solutions. I tried
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> data1={2,3/4,1.3,=E4}
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> {2,3/4,1.3,=E4}
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> Cases[data1, Except[_Complex]]
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> {2,3/4,1.3}
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> and got, what I expected. But when I have data like
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> {0,0,-I Sqrt[3],I Sqrt[3]}
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> The above doesn't work. Is this due to a different Head? Is there an easy
> way to filter the non-complex data?
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> Thanks in advance
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> Greetings
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> Joerg
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> ################
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> Dr. J=F6rg Schr=F6der
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> Bremen, Germany
>
- References:
- Only real data
- From: Jörg Schröder <HB-Kowalczyk-Schroeders@t-online.de>
- Only real data