> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Xebar Saram > Sent: Thursday, July 22, 2010 3:50 PM > To: r-help@r-project.org > Subject: [R] choosing a random sample by precentage > > hi all > > i have found the follwoing way to choose a random sample by sample size > (200): > > ten_per_T2000 <- F_T2000_All[sample(nrow(F_T2000_All), 200), ] > > > but i wondered if there is a way to choose a sample size by > precentage (10% etc..) > > thx > > ethan >
Maybe something like: >ten_per_T2000 <- F_T2000_All[sample(nrow(F_T2000_All), 0.1*nrow(F_T2000_All)), >] Hope this is helpful, Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204 ______________________________________________ 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.
