Try this Open the spreadsheet in Excel. Select all of the data click Copy. Don't close Excel.
Open R and type the following command: > Foglio1 <- read.table("clipboard-128", header=TRUE, sep="\t") Now take a look at the structure of the data.frame > str(Foglio1) 'data.frame': 1489 obs. of 15 variables: $ Date: Factor w/ 1489 levels "1/10/2002","1/10/2003",..: 1275 1291 1295 1299 1304 1309 1321 1325 1329 1337 ... $ a : num 202 201 202 201 202 ... $ b : num 231 230 230 230 232 ... $ c : num 177 179 181 180 182 ... $ d : num 277 277 276 276 275 ... $ e : num NA NA NA NA NA NA NA NA NA NA ... $ f : num 275 277 279 279 279 ... $ g : num 91.7 90.7 90.8 91.1 91 ... $ h : num 11446 11258 11280 11396 11127 ... $ i : num 388 389 393 392 393 ... $ l : num 93.2 94 92.4 93.4 93.1 ... $ m : num 128 127 126 129 130 ... $ n : num NA NA NA NA NA NA NA NA NA NA ... $ o : num 133 133 133 133 133 ... $ p : num 107 107 107 107 107 ... ---------------------------------------------- David L Carlson Associate Professor of Anthropology Texas A&M University College Station, TX 77843-4352 > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Pietro > Sent: Monday, March 18, 2013 1:57 PM > To: Berend Hasselman > Cc: r-h...@stat.math.ethz.ch > Subject: Re: [R] data.frame with NA > > Yes, it's true Berend! > > What i do is simply use read.xlsx function > > db <- read.xlsx2("c:/mydb.xlsx",1,as.data.frame=T) > > This is excel file i use: > http://dl.dropbox.com/u/102669/mydb.xlsx > > I can't find a way to import as numeric. > My objective is to be able to work (in R) with my NA's > > > At 18.46 18/03/2013, Berend Hasselman wrote: > > >On 18-03-2013, at 16:49, Pete <freeri...@gmail.com> wrote: > > > > > > > > I have this little data.frame > > > > > > http://dl.dropbox.com/u/102669/nanotna.rdata > > > > > > Two column contains NA, so the best thing to do is use na.locf > > function (with > > > fromLast = T) > > > > > > But locf function doesn't work because NA in my data.frame are > > not recognized as > > > real NA. > > > > > > Is there a way to substitute fake NA with real NA? In this case > > na.locf function > > > should work > > > > > > >Your data are all characters. Do > > > >str(db) > > > >to see that. What is probably supposed to be numeric is also > character, > >Somehow you have managed to read in data that R thinks is all chr. > >Your NA are "NA" in reality: a character string "NA". > > > >You will have to review the method you used to get the data into R. > >And make sure that what you want to be numeric is indeed numeric. > >Then you can start to think about doing something about the NA's. > > > >Berend > > ______________________________________________ > 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. ______________________________________________ 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.