Groups > comp.soft-sys.math.mathematica > #2715

Re: Position

From	Armand Tamzarian <mike.honeychurch@gmail.com>
Newsgroups	comp.soft-sys.math.mathematica
Subject	Re: Position
Date	2011-05-25 23:33 +0000
Organization	Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID	<irk3k9$7a7$1@smc.vnet.net> (permalink)
References	<irine1$rg9$1@smc.vnet.net>

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On May 25, 8:59 pm, Oliver Ruebenkoenig <ruebe...@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

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Re: Position Oliver Ruebenkoenig <ruebenko@wolfram.com> - 2011-05-25 10:59 +0000
  Re: Position Armand Tamzarian <mike.honeychurch@gmail.com> - 2011-05-25 23:33 +0000

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