Hi:
here is one solution. Not so elegant but maybe it will give you some ideas:
mylist1-rep(mylist,c(2,2))
a-matrix(c(index1,!index1,index2,!index2),ncol=4)
mylist2-list()
for (i in 1:4)
{
mylist2[[i]]-mylist1[[i]][,a[,i]]
}
mylist2
Andrija
On Sun, Apr 3, 2011 at 6:56 PM, Axel Urbiz axel.ur...@gmail.com wrote:
Dear List,
Let's say I have a list whose components are 2 matrices (as exemplified in
the mylist object below). I'd like to create a list with components being
4 matrices based on an logical index vector. is there a way to simplify
what
I'm doing to obtain the results in mylist2? I'd like something that would
work on an arbitrary number of elements in mylist.
mylist - list(matrix(1:9,3,3), matrix(10:18,3,3))
index1 - c(TRUE,FALSE,TRUE)
index2- c(FALSE,TRUE,TRUE)
mylist2 - list(mylist[[1]][,index1],
mylist[[1]][,index1==FALSE],
mylist[[2]][,index2],
mylist[[2]][,index2==FALSE])
Thanks in advance,
Axel.
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