If you are reading the data frame using for instance read.csv, you can put in the argument na.string ="9999". Another way to do that is data[data ==9999] <- NA.
It should be good to tell us how you are reading your dataset. On Feb 21, 2015 6:49 AM, "Jeff Newmiller" <jdnew...@dcn.davis.ca.us> wrote: > You did not say how you imported the data, but if you used one of the > read.table variants (including read.csv) then you can use the na.strings > argument as documented in the help file for read.table. > > Next time please read the posting guide, as there are some useful tips in > there, such as posting using plain text (a setting in your email program) > so we don't get garbled info from you, and providing a reproducible example. > --------------------------------------------------------------------------- > Jeff Newmiller The ..... ..... Go Live... > DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live > Go... > Live: OO#.. Dead: OO#.. Playing > Research Engineer (Solar/Batteries O.O#. #.O#. with > /Software/Embedded Controllers) .OO#. .OO#. rocks...1k > --------------------------------------------------------------------------- > Sent from my phone. Please excuse my brevity. > > On February 20, 2015 10:55:30 AM PST, Alexandra Catena <amc5...@gmail.com> > wrote: > >Hello All, > > > >I have a data frame of two columns for wind. The first column is for > >wind > >speed and the second wind direction. I'm trying to replace the 9999 > >values > >in the first column and the 999 values in the second column with NA. I > >tried to use the function ltdl.fix.df but it doesn't seem to do > >anything. > > > >> ltdl.fix.df(windMV, zero2na = FALSE, coded = 999) > > > > n = 9432 by p = 4 matrix checked, 0 NA(s) present > > > > 0 factor variable(s) present > > > > 5675 value(s) coded 999 set to NA > > > > 0 -ve value(s) set to +ve half the negative value > > > > > >I have R version 3.1.1 > > > >Thanks, > >Alexandra > > > > [[alternative HTML version deleted]] > > > >______________________________________________ > >R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > >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 -- To UNSUBSCRIBE and more, see > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
