Hi you are not overly specific about what you really want but maybe
daf1[sample(1:83805, 10000), ] This selects randomly 10000 rows from daf1 Is this what you want? Regards Petr [EMAIL PROTECTED] napsal dne 25.08.2008 13:31:15: > > I have a data frame (daf1), that holds +80000 records, and 10 variables (i.e. > 10 columns and some 80000 rows) > > > length(daf1) > [1] 10 > > length(daf1[,1]) > [1] 83805 > > I would like to sample() e.g. 10000 records from this. I use: > > > daf2 <- sample(daf1, 1000, replace = FALSE, prob = NULL) > Error in `[.data.frame`(x, .Internal(sample(length(x), size, replace, : > cannot take a sample larger than the population when 'replace = FALSE' > > As length(daf1) is 10, it thinks I'm taking 10000 samples from a size 10 > population... Arghhh > > How do I go about sampeling from a data frame? > > :-( Martin > > ______________________________________________ > 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. ______________________________________________ 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.
