split <- sample(2,nrow(dataframe),replace=T,prob=c(0.04,0.96)) dataframe[split==1,] # 200 dataframe[split==2,] # 4800
regards, christian > ?sample should tell you what you need to know. > > On 26/11/06, Alexander Geisler <[EMAIL PROTECTED]> wrote: > >> Hello! >> >> I have a data set with 8 columns and in about 5000 rows. What I want to >> do is to generate samples of this data set. >> >> Samples of a special size, as example 200. >> >> What is the easiest way to do this? No special things are needed, only >> the random selection of 200 rows of the data set. >> >> Thanks >> Alex >> >> -- >> Alexander Geisler * Kaltenbach 151 * A-6272 Kaltenbach >> email: [EMAIL PROTECTED] | [EMAIL PROTECTED] >> phone: +43 650 / 811 61 90 | skpye: al1405ex >> >> ______________________________________________ >> 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 >> and provide commented, minimal, self-contained, reproducible code. >> >> > > > ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.