[R] Vectors out of lists?

[Phil Spector]

Eduardo -
    I'd guess that

Ybar = function(u)mean(sapply(Y,function(fun)fun(u)))

will do what you want, but without a reproducible example,
it's hard to tell.
 					- Phil Spector
 					 Statistical Computing Facility
 					 Department of Statistics
 					 UC Berkeley
 					 spector at stat.berkeley.edu


On Tue, 16 Nov 2010, Eduardo de Oliveira Horta wrote:

> Hello there
>
> I have a list, Y, and each component of that list is a real-valued function
> (that is, Y[[i]](u) returns a number).
>
> I was wishing to build the mean function and the first thing I thought of
> was
>
> Ybar<-function(u){
>   mean(Y[[1:n]](u))
> }
>
> but obviously this doesn't work, since Y[[1:n]] is not allowed at all.
>
> Any elegant suggestions? I really would like to avoid something like
>
> Ybar<-function(u){
>   for (i in 1:n){
>      Ybar<-Ybar + Ybar[[i]](u)
>   }
>   Ybar<-1/n*Ybar
> }
>
> Thanks in advance!
>
> Best regards,
>
> Eduardo Horta
>
> 	[[alternative HTML version deleted]]
>
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