> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Michael Bedward > Sent: Wednesday, September 29, 2010 5:34 PM > To: Michael Larkin; Rhelp > Subject: Re: [R] repeat a function > > On 30 September 2010 02:48, Michael Larkin <mlar...@rsmas.miami.edu> > wrote: > > > > > > testdat <- replicate( 50, growth[ sample(nrow(growth), 8, rep=TRUE) > ] ) > > > > I can't seem to get it to work. I keep getting the error message of > > "undefined columns selected" > > > > Any advice? >
Michael, As has been pointed out, you seem to be trying to reinvent the wheel. But to answer your question, you need a comma just before the final square bracket. Then you need to set the simplify=FALSE parameter for the replicate function. So something like this testdat <- replicate( 50, growth[sample(nrow(growth), 8, rep=TRUE),], simplify=FALSE) 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.
