subset without removing NAs
On Apr 28, 2011, at 3:53 PM, Benjamin Caldwell wrote:
Hi folks, I'm dealing with a dataset with a lot of NAs, and want to use subset on the data without removing the NAs from the the dataframe; e.g. rws50 <- subset(rw.fire.RW,shigo.av<50) This removes instances with NA for the value in addition to anything <50. Any suggestions much appreciated.
If you use "[" instead the NA's will come though: rw.fire.RW[ shigo.av<50, ] In fact I generally wrap my logicals in which to avoid such (mis?)behavior. but you appear to approve of it. == David Winsemius, MD West Hartford, CT