[R] lapply and for

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From: Agustin Lobo (alobo@ija.csic.es)
Date: Mon 23 Jul 2001 - 07:45:04 EST 

Message-id: <Pine.OSF.3.96.1010722234411.13791A-100000@ija.csic.es>

Given a list as such:

> milista
$"1":
[1] 23 25 11

$"2":
[1] 34 2

$"3":
[1] 12 1 0 1050 2

What's faster:

> a <- NULL
> for (i in names(milista)){
+ a <- c(a,(mean(milista[[i]])))
+ }

or

a <- lapply(milista,mean)

?

(I understand that the second option
is nicer and more compact, but is it
faster?).

Thanks

Agus

Dr. Agustin Lobo
Instituto de Ciencias de la Tierra (CSIC)
Lluis Sole Sabaris s/n
08028 Barcelona SPAIN
tel 34 93409 5410
fax 34 93411 0012
alobo@ija.csic.es

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