Re: Position
- To: mathgroup at smc.vnet.net
- Subject: [mg119223] Re: Position
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Wed, 25 May 2011 19:31:07 -0400 (EDT)
You are using a pure function as your second argument but you should use a
pattern:
Position[data, x_ /; x > 0.95]
or
Position[data, _?(# > 0.95 &)]
Andrzej Kozlowski
On 25 May 2011, at 11:54, 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
> --
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> Gymnasium Walsrode
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>