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365,12
2011 Aug 22
1
Data Frame Indexing
Hello,
I've been dealing with a set of values that contain time stamps and part
of my summary needs to look at just weekend data. In trying to limit the
data I've found a large difference in performance in the way I index a
data frame. I've constructed a minimal example here to try to explain my
observation.
is.weekend <- function(x) {
tm <-