Re: Position
- To: mathgroup at smc.vnet.net
- Subject: [mg119237] Re: Position
- From: Armand Tamzarian <mike.honeychurch at gmail.com>
- Date: Wed, 25 May 2011 19:33:39 -0400 (EDT)
- References: <irine1$rg9$1@smc.vnet.net>
On May 25, 8:59 pm, Oliver Ruebenkoenig <ruebe... at wolfram.com> wrote:
> 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
Also
Position[data, x_ /; x >= 0.95]
...and so on
Mike