Re: Parts of a list
- To: mathgroup at smc.vnet.net
- Subject: [mg15536] Re: [mg15430] Parts of a list
- From: jtischer at col2.telecom.com.co (Cl-Jurgen Tischer)
- Date: Tue, 26 Jan 1999 13:44:26 -0500 (EST)
- Organization: Universidad del Valle
- References: <199901140157.UAA02693@smc.vnet.net.>
- Sender: owner-wri-mathgroup at wolfram.com
Hossein,
In[1]:= Select[x,#[[2]]!=0&]
Out[1]= {{2.5,0.5},{0,2}}
In[2]:= DeleteCases[x,{_,0}]
Out[2]= {{2.5,0.5},{0,2}}
In[3]:= Cases[x,{_,_?(#!=0&)}]
Out[3]= {{2.5,0.5},{0,2}}
Jurgen
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
- References:
- Parts of a list
- From: "Hossein Kazemi" <kazemi@som.umass.edu>
- Parts of a list