Consider this: > letters[c(2, 3)] [1] "b" "c" > letters[c(2, NA)] [1] "b" NA > letters[c(NA, 3)] [1] NA "c" > letters[c(NA, NA)] [1] NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA [26] NA
The result is a 2-vector in each case until we get to c(NA, NA) and then it unexpectedly changes from returning a 2-vector to returning a 26-vector. I think most people would have expected that the answer would be c(NA, NA). -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
