[R] select cases from a data.frame or matrix
till.baumgaertel at epost.de
Wed Jun 20 13:38:09 CEST 2001
is there a better solution to select rows from a data.frame than by iterating
through the whole set and evaluating every case one by one?
is there maybe something like:
d <- data.frame(...)
maleOver40 <- select.data.frame( d, "( sex=m or sex=M) and age > 40)")
of course, i could use direct database-requests, but this would require my data
to be stored in a database...
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