On Jun 8, 2012, at 12:33 PM, Guido Leoni wrote:
Dear list
Is there a way to extract a random sample without duplicated row
from a
dataframe ?.
a=c(1,2,3,1,1,1,2,1)
b=c(1,2,3,1,2,1,2,1)
c=c(1,1,1,1,1,1,1,1)
d=c(1,2,3,1,1,1,2,1)
prov<-data.frame(a,b,c,d)
prov2<-prov[sample(1:nrow(prov),5,replace=T),]
prov2
a b c d
3 3 3 1 3
6 1 1 1 1
3.1 3 3 1 3
5 1 2 1 1
8 1 1 1 1
I tryed the above code but as you can see sample function includes
also
duplicates.
thank you for any tip
Why would you use replace=T if you didn't want duplicates???
--
David Winsemius, MD
West Hartford, CT
______________________________________________
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.
