"Hiroto Miyoshi" <[EMAIL PROTECTED]> writes: > Dear R users > > I have a data frame containing character and numeric variables, whose > name is seishin. When I tried to assign NA to "" in the data frame, R, 2.00 > showed an error message, such as > > > seishin[seishin==""]<-NA > Error: NAs are not allowed in subscripted assignments > > This did not happen under R 1.9.0. > > More oddly, > The following commands work just fine under R 2.0.0 > > a<-1:10 > > b<-letters[1:10] > > b[3]<-"" > > c<-data.frame(cbind(a,b)) > > c[c==""]<-NA > > Why is this so?
It is the NA pattern on the left hand side that matters. Does it help to use seishin[!is.na(seishin) & seishin==""]<-NA ? (For atomic vectors you could also use %in% instead of ==, but this doesn't work with data frames.) > And how can I assign NA to "" data.framewise in seishin data.frame? -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [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
