[R] How to iteratively extract elements out of a list
xpRt.wannabe
xprt.wannabe at gmail.com
Fri Aug 25 20:52:51 CEST 2006
Dear List,
The following code produces a list, which is what I what:
set.seed(123)
tmpf <- function() {
x <- rpois(rpois(1,4),2)
}
n <- 3
m <- replicate(n,tmpf())
m
[[1]]
[1] 3 2 4
[[2]]
[1] 0 2 4 2 2 5 2
[[3]]
[1] 2 0 4 1 0
Now I need something that would to extract iteratively (or as many
times as
the size of 'n') the values that are greater than 2 in each component
of
'm' into another list such that the sub-list would be:
[[1]]
[1] 3 4
[[2]]
[1] 4 5
[[3]]
[1] 4
Below is what I tried:
for(i in 1:3)
sub.list <- lapply(m,subset,m[[i]]>2)
> sub.list
which gives me something different from what I want:
[[1]]
[1] 4
[[2]]
[1] 4
[[3]]
[1] 4
Any help would be appreciated.
> version
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 2
minor 2.1
year 2005
month 12
day 20
svn rev 36812
language R
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