Full_Name: Marc Mamin Version: 1.8, 2.0.0 OS: Windows & Linux Submission from: (NULL) (217.17.202.254)
Using only the beginning of a column name will match it: >aaa<-1 >df<-as.data.frame(aaa) >names(df) [1] "aaa" >df$a [1] 1 !!!!!!!!! (I expect df$a to be undefind) >df$x >NULL Compare with: > df["aaa"] aaa 1 1 > df["a"] Error in "[.data.frame"(df, "a") : undefined columns selected Here another example that underline how problematic this issue can be: aa1<-1 aa2<-2 df<-as.data.frame(aa1,aa2) > df$aa [1] 1 (only the first matching column is retrieved) ______________________________________________ R-devel@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
