Hi, tim, thank you very much for the reply, but I am really a new user. How to change all NAs to zero?
thanks again. karena jholtman wrote: > > ?read.table > > na.strings='.' > > Then change all NAs to zero df$col[is.na(df$col)] <- 0 > > On Tue, Jan 12, 2010 at 12:46 PM, karena <dr.jz...@gmail.com> wrote: > >> >> hi, I have a question about importing data in R. >> >> I want to import a file which has missing value in it, and the missing >> values are denoted as ".", I want to first read in the file, and then >> change >> the "." into the number zero "0". >> >> how can I do that? >> >> thank you, >> >> karena >> -- >> View this message in context: >> http://n4.nabble.com/how-to-handle-missing-values-when-importing-data-in-R-tp1012298p1012298.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<http://www.r-project.org/posting-guide.html> >> and provide commented, minimal, self-contained, reproducible code. >> > > > > -- > Jim Holtman > Cincinnati, OH > +1 513 646 9390 > > What is the problem that you are trying to solve? > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > > -- View this message in context: http://n4.nabble.com/how-to-handle-missing-values-when-importing-data-in-R-tp1012298p1012318.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.