[R] select cases from a data.frame or matrix

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From: Till Baumgaertel (till.baumgaertel@epost.de)
Date: Wed 20 Jun 2001 - 21:38:09 EST 

Message-ID: <3B30A741.23872.867E0D@localhost>

hi all,

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...

thank you,
till 

--
"I have seen things you people wouldn't believe.
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I watched seabeams glitter in the dark near the 
Tannhauser gate.
All  those  moments  will  be lost in time like
tears in rain. Time to die."              (Roy)
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