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Re: Parts of a list

  • To: mathgroup at
  • Subject: [mg15450] Re: [mg15430] Parts of a list
  • From: BobHanlon at
  • Date: Mon, 18 Jan 1999 04:21:51 -0500
  • Sender: owner-wri-mathgroup at

In a message dated 1/14/99 12:49:51 AM, kazemi at writes:

>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.
x={{1,0},{2.5, .5},{3,0},{0,2}};

Select[x, #[[2]] != 0&]

{{2.5, 0.5}, {0, 2}}

Bob Hanlon

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