2 messages · Julian TszKin Chan, Daniel Nordlund
How can i select a set of element in a list ?
x<-list(1,2,3,4,5)
How can I create a new list which only have the last 4 elements of x.
I can do it with a loop, but I want to avoid that. Thanks!
example :
y<-vector("list",4)
for ( i in 1:length(y) )
y[[i]] <- x[[ i + length(x) - length(y) ]]
y
[[1]] [1] 2 [[2]] [1] 3 [[3]] [1] 4 [[4]] [1] 5 Regards, Julian
-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Julian TszKin Chan
Sent: Wednesday, December 08, 2010 2:39 PM
To: r-help at r-project.org
Subject: [R] How can i select a set of element in a list ?
How can i select a set of element in a list ?
x<-list(1,2,3,4,5)
How can I create a new list which only have the last 4 elements of x.
I can do it with a loop, but I want to avoid that. Thanks!
example :
y<-vector("list",4)
for ( i in 1:length(y) )
y[[i]] <- x[[ i + length(x) - length(y) ]]
y
[[1]] [1] 2 [[2]] [1] 3 [[3]] [1] 4 [[4]] [1] 5 Regards, Julian
Julian, You use standard indexing to do that. y <- x[-1] Hope this is helpful, Dan Daniel Nordlund Bothell, WA USA