Re: Position
- To: mathgroup at smc.vnet.net
- Subject: [mg119219] Re: Position
- From: Oliver Ruebenkoenig <ruebenko at wolfram.com>
- Date: Wed, 25 May 2011 06:59:01 -0400 (EDT)
On Wed, 25 May 2011, Joerg Schroeder wrote:
> Dear Group,
>
> I don't understand the following:
>
> I have a list of data and want to find the position of special elements:
>
> data=Table[CDF[BinomialDistribution[150,0.3],k],{k,0,150}]
>
> Position[data,#>=0.95&]
>
> With this I get {} (null set) as an answer, whereas for example Select gives the answer I expect.
>
> Select[data,#>=0.95&]
>
> Do I do something wrong with Position?
>
> Thanks
>
> Jorg Schroder
>
Joerg,
Position works like Cases:
Position[data, _?(# >= 0.95 &)]
Select[data, # >= 0.95 &]
Cases[data, _?(# >= 0.95 &)]
Oliver