Re: Position
- To: mathgroup at smc.vnet.net
- Subject: [mg119229] Re: Position
- From: Matthias Bode <lvsaba at hotmail.com>
- Date: Wed, 25 May 2011 19:32:12 -0400 (EDT)
Hola Joerg:
"Position[expr, pattern] gives a list of the positions at which objects matching _pattern_ appear in expr."
"Select[list,crit] picks out all elements Subscript[e, i] of list for which_crit[Subscript[e, i]]_ is True."
Saludos,
MATTHIAS BODE
S 17.35775=B0, W 066.14577=B0
2'740 m
AMSL.
> Date: Wed, 25 May 2011 05:54:45 -0400
> From: sd-gymwalsrode at gmx.de
> Subject: [mg119203] Position
> To: mathgroup at smc.vnet.net
>
> 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
>
> NEU: FreePhone - kostenlos mobil telefonieren! =09
> Jetzt informieren: http://www.gmx.net/de/go/freephone
>