[R] List Conversion

From: Liz Dem <liz392_at_mail.com>
Date: Thu 09 Feb 2006 - 14:21:41 EST


Hello,

I have a list (mode and class are list) in R that is many elements long and of the form: >length(list)
[1] 5778

>list[1:4]
$ID1
[1] "num1"

$ID2
[1] "num2" "num3"

$ID3
[1] "num4"

$ID4
[1] NA

I'd like to convert the $ID2 value to be in one element rather than in two.  It shows up as c(\"num2\", \"num3\") if I try to use paste(list[2], collapse=""). I need to do this over the length of the entire list, however list2 <- apply(list, 1, paste, collapse="") tells me 'Error in apply : dim(X) must have a positive length'. dim(list) does not have a positive length, which I think is due to the fact that it's a list and not a matrix or data frame.

What I want to get is:
>list[1:4]
$ID1
[1] "num1"

$ID2
[1] "num2 num3"

$ID3
[1] "num4"

$ID4
[1] NA

Thanks.
Liz

-- 
___________________________________________________
Play 100s of games for FREE! http://games.mail.com/

______________________________________________
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Received on Thu Feb 09 14:29:57 2006

This archive was generated by hypermail 2.1.8 : Fri 03 Mar 2006 - 03:42:26 EST