Re: Parts of a list
- To: mathgroup at smc.vnet.net
- Subject: [mg15450] Re: [mg15430] Parts of a list
- From: BobHanlon at aol.com
- Date: Mon, 18 Jan 1999 04:21:51 -0500
- Sender: owner-wri-mathgroup at wolfram.com
In a message dated 1/14/99 12:49:51 AM, kazemi at som.umass.edu 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