have a look at function paste(), e.g.,
Dat <- data.frame(A = c("aaa", "bbb", "ccc", "ddd"),
B = c(111, 222, 333, 444))
Dat$C <- paste(Dat$A, Dat$B, sep = ".")
Dat
I hope it helps.
Best,
Dimitris
On 11/30/2010 9:30 AM, alcesgabbo wrote:
I have a table like this:
A B
aaa 111
bbb 222
ccc 333
ddd 444
and I would like a new row C:
A B C
aaa 111 aaa.111
bbb 222 bbb.222
ccc 333 ccc.333
ddd 444 ddd.444
How can I do this
???
Thanks
Alberto
--
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center
Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
Tel: +31/(0)10/7043478
Fax: +31/(0)10/7043014
Web: http://www.erasmusmc.nl/biostatistiek/
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