I have a data frame that I am extracting some records from and noticed
the following issue
I originally used tmp <- subset(dd, dd$EVYEAR==2012 & dd$EVMONTH=='02')
and noticed that I wasn't ending up with all of the records I should
have; however, when I used
tmp <- dd[dd$EVYEAR==2012 & dd$EVMONTH=='02',]
I did get all of the records I should have.
I thought the two forms were equivalent, am I mistaken?
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