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Re: Conditional drop of list elements

  • To: mathgroup at smc.vnet.net
  • Subject: [mg63572] Re: Conditional drop of list elements
  • From: dh <dh at metrohm.ch>
  • Date: Thu, 5 Jan 2006 06:02:42 -0500 (EST)
  • References: <dpip1p$l3l$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Lector,
Select is the function you are looking for:

Select[list1, #[[1]] == 1 &]

Daniel

LectorZ wrote:
> Hi guys,
> 
> I need your assistance by the following problem:
> 
> list1 = {{0,A,A,A}, {1,B,B,B}, {0,C,C,C}, {1,D,D,D}, {1,F,F,F},
> {0,G,G,G}, {0,H,H,H}}
> 
> Every 1st element of the each sublist should be checked. Is the first
> element a ZERO, this sublist should be removed from the list. If it is
> a ONE - this sublist remains in the list.
> 
> In this example the output should be:
> 
> {{1,B,B,B}, {1,D,D,D},{1,F,F,F}}
> 
> Thanks for your help!
> 
> LZ
> 


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