try the following:
strg <- c("123:abc", "qwe:789f", "abcde", "a:fd", "567")
sapply(strsplit(strg, ":"), function(x){
if (length(x) == 1) x <- c(x, NA)
x
})
I hope it helps.
Best,
Dimitris
----
Dimitris Rizopoulos
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
http://www.student.kuleuven.be/~m0390867/dimitris.htm
----- Original Message -----
From: "Daniel Brewer" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, March 04, 2008 2:54 PM
Subject: [R] Best way to strsplit a column
> Hello,
>
> I have a data.frame with a column that I would like to split into
> based
> around the delimiter ":". This is a useful feature in Excel. I
> cannot
> work out the best way to do it in R. I am sure you need to use
> strsplit, but that returns a list. The problem is that some values
> in
> the column do not contain a ":" so should have a "NA" in the second
> column of the result, and this makes doing an unlist a non-starter.
>
> Any ideas?
>
> Many thanks
>
> Daniel Brewer
>
> The Institute of Cancer Research: Royal Cancer Hospital, a
> charitable Company Limited by Guarantee, Registered in England under
> Company No. 534147 with its Registered Office at 123 Old Brompton
> Road, London SW7 3RP.
>
> This e-mail message is confidential and for use by the...{{dropped:14}}
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
