Odd behaviour of R 2.00
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? And how can I assign NA to "" data.framewise in seishin data.frame? Please help. Sincerely -------------------------------- Hiroto Miyoshi h_m_ at po.harenet.ne.jp