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Re: Parts of a list

  • To: mathgroup at smc.vnet.net
  • Subject: [mg15473] Re: Parts of a list
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Mon, 18 Jan 1999 04:22:13 -0500
  • Organization: Universitaet Leipzig
  • References: <77jkve$304@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Hossein,


x /. {_,0} :> Sequence[]

will do what you want.

Hope that helps
  Jens


Hossein Kazemi wrote:
> 
> I have a list (matrix) that looks like this
> 
> x={{1,0},{2.5, .5},{3,0},{0,2}}
> 
> Now I want to eliminate those vectors that have zero for the second
> case. That is, I want to get
> 
> {{2.5, .5},{0,2}}.
> 
> Is there a quick way of doing this?
> I tried to apply Select to this but could not get it to work.
> 
> Thanks for your help.
> 
> Hossein Kazemi
> UMass
> kazemi at som.umass.edu


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