Hi, Try this: dat1<-read.table(text=" V1 V2 1 5 10 2 6 3 3 8 4 4 9 20 5 15 30 6 25 40 7 2 4 8 3 1 9 1 5 10 8 10 ",header=TRUE) dat1[sample(1:nrow(dat1), 0.50*nrow(dat1)),] #50% of data # V1 V2 #4 9 20 #6 25 40 #8 3 1 #10 8 10 #9 1 5 dat1[-sample(1:nrow(dat1), 0.90*nrow(dat1)),] #remove 90% of data # V1 V2 #7 2 4
----- Original Message ----- From: Eugenie <leemean...@hotmail.com> To: r-help@r-project.org Cc: Sent: Tuesday, October 30, 2012 11:12 AM Subject: [R] HELP!! how to remove 10% of data randomly in R any can please tell me how to remove 10%,15%,25% and 50% of the data randomly by using R programme??? can anyone please show me the coding? do i need to install any package? -- View this message in context: http://r.789695.n4.nabble.com/HELP-how-to-remove-10-of-data-randomly-in-R-tp4647879.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
