Message-ID: <x2oe1cs4ii.fsf@turmalin.kubism.ku.dk>
Date: 2006-02-12T20:31:33Z
From: Peter Dalgaard
Subject: mean from list
In-Reply-To: <EMEELGDEKHMIAKDGLCDCGEMICKAA.Statistical.model@gmail.com>
statistical.model at googlemail.com writes:
> hi all,
> I have a simple problem that i am not able to solve. I've a list called
> datalist with the following structure:
>
> [...]
>
> [[10]]
> [[10]]$a
>
> -1 0 1
> -1 31 5 2
> 0 6 7 5
> 1 1 7 36
>
> [[10]]$b
>
> -1 0 1
> -1 31 5 2
> 0 6 7 5
> 1 1 7 36
>
> [[10]]$c
> [1] 0.855
>
> [[10]]$d
> [1] 0.855
>
> [...]
>
> with [[1]] ... [[100]]. How can i get the mean value of datalist[[x]]$d,
> where x represents all elements from 1 to 1000 ?
I'd try something like
mean(sapply(x,"[[","d"))
--
O__ ---- Peter Dalgaard ??ster Farimagsgade 5, Entr.B
c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907