Hi r-help-boun...@r-project.org napsal dne 04.05.2010 14:54:14:
> I need to replace <NA> occurrences in multiple columns in a data.frame > with "000/000" Be careful if you replace NA in numeric columns. > str(test) 'data.frame': 10 obs. of 3 variables: $ mp: num 20.9 19.9 20.1 20.2 18.9 ... $ so: num 18.8 18.6 18.2 17.9 18.1 ... $ le: num 48 49.1 48.8 42.6 46.1 ... > test[2,2] <- NA > test[is.na(test)] <- "000/000" > str(test) 'data.frame': 10 obs. of 3 variables: $ mp: num 20.9 19.9 20.1 20.2 18.9 ... $ so: chr "18.75" "000/000" "18.25" "17.89" ... $ le: num 48 49.1 48.8 42.6 46.1 ... > numeric column is now character and you can not use it for further analysis without some fiddling around. Regards Petr > > how do I achieve this? > > Thanks > > Nevil Amos > > ______________________________________________ > 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.
