On Sep 21, 2010, at 11:28 , Jeff Newmiller wrote: > Short answer: don't do that. > > The format function is for preparing data for output. Do your data > manipulations on a data frame you keep for such use, and only use format to > prepare for output.
But isn't that what the OP is doing? It is actually a bit odd that the formatting functions do not allow the NA code to be set. Probably, the easiest workaround goes like this aqf <- format(airquality) aqf[is.na(airquality)] <- "-" head(aqf) Ozone Solar.R Wind Temp Month Day 1 41 190 7.4 67 5 1 2 36 118 8.0 72 5 2 3 12 149 12.6 74 5 3 4 18 313 11.5 62 5 4 5 - - 14.3 56 5 5 6 28 - 14.9 66 5 6 > > "n.via...@libero.it" <n.via...@libero.it> wrote: > >> Dear R list >> I have a problem with NA, which should be a string, but R seems that it >> doesn't recognize it. What I do is first give the format command to my data >> frame: >> >> format.data.frame(mydata,big.mark=" ") >> >> so I give a blank as thousand separator. All my records in my data frame >> become strings, so instead of having NA I have "NA". I try to convert "NA" >> in >> ".",but it seems that R doesn't recognize "NA". >> >> Someone knows why and how to treats those "NA"?? >> >> >> Thanks for your attention >> >> ______________________________________________ >> 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. > > --------------------------------------------------------------------------- > 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. > > ______________________________________________ > 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. -- Peter Dalgaard Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.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.
