Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.soft-sys.math.mathematica > #2724

Re: Position

Show all headers | View raw

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
> --
> Dr. J=F6rg Schr=F6der
> Gymnasium Walsrode
> Sunderstrasse 19
> 29664 Walsrode
>

Back to comp.soft-sys.math.mathematica | Previous | Next | Find similar | Unroll thread

Thread

Re: Position Andrzej Kozlowski <akoz@mimuw.edu.pl> - 2011-05-25 23:30 +0000

csiph-web