Groups > comp.soft-sys.math.mathematica > #2704

Re: Position

From	Oliver Ruebenkoenig <ruebenko@wolfram.com>
Newsgroups	comp.soft-sys.math.mathematica
Subject	Re: Position
Date	2011-05-25 10:59 +0000
Organization	Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID	<irine1$rg9$1@smc.vnet.net> (permalink)

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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

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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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