Re: Position of element in a list
- To: mathgroup at smc.vnet.net
- Subject: [mg16369] Re: [mg16301] Position of element in a list
- From: Jurgen Tischer <jtischer at col2.telecom.com.co>
- Date: Thu, 11 Mar 1999 02:16:43 -0500
- Organization: Universidad del Valle
- References: <199903070605.BAA23750@smc.vnet.net.>
- Sender: owner-wri-mathgroup at wolfram.com
In[1]:= Position[{-1, 3, -2, 1}, -_]
Out[1]= {{1},{3}}
Jurgen
Roger Mason wrote:
>
> Hi,
>
> I want to find the Position[] of negative elements in a list. The obvious
> methods do not work:
>
> Position[{-1, 3, -2, 1}, -_]
>
> and
>
> Position[{-1, 3, -2, 1}, -x_]
>
> return
>
> {}
>
> So how do I perform this apparently simple task?
>
> Thanks,
>
> Roger Mason
- References:
- Position of element in a list
- From: Roger Mason <rmason@sparky2.esd.mun.ca>
- Position of element in a list