Hi [email protected] napsal dne 09.11.2010 18:33:54:
> Kate Hsu <[email protected]> > Odeslal: [email protected] > > 09.11.2010 18:33 > > Komu > > [email protected] > > Kopie > > Předmět > > [R] Question regarding to replace <NA> > > Dear r-users, > > Basically, I have a data as follows, > > > data > S s1 s2 s3 s4 s5 prob obs num.strata > 1 NNNNN N N N N N 0.0000108 32 <NA> > 2 NNNNY N N N N Y 0.0005292 16 <NA> > 3 NNNYN N N N Y N 0.0005292 24 <NA> > 4 NNNYY N N N Y Y 0.0259308 8 1 > .... > > I want to replace <NA> by 0, when I tried the following command, I get som > error message. > data[is.na(data)]<-0 > > Warning message: > In `[<-.factor`(`*tmp*`, thisvar, value = 0) : > invalid factor level, NAs generated It is because num.strata is probably factor see str(data) however there is usually no need for changing NA to zero as many (most, all?) functions have some kind of clever handling of missing values represented by NA. regards Petr > > Anyone knows how to deal with this? > > Thanks, > > Kate > > [[alternative HTML version deleted]] > > ______________________________________________ > [email protected] 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. ______________________________________________ [email protected] 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.
