[Rd] unexpected '[<-.data.frame' result
Charles C. Berry
cberry at tajo.ucsd.edu
Wed Oct 26 21:24:53 CEST 2005
Is this a bug?
If not, I am curious to know why '[<-.data.frame' was designed to yield
a.frame$y != a.frame$z rather than refusing to carry out the operation at
all.
> a.frame <- data.frame( x=letters[1:5] )
> a.frame[ 2:5, "y" ] <- letters[2:5]
> a.frame[[ "z" ]][ 2:5 ] <- letters[2:5]
> a.frame
x y z
1 a b <NA>
2 b c b
3 c d c
4 d e d
5 e <NA> e
Chuck
Charles C. Berry (858) 534-2098
Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu UC San Diego
http://biostat.ucsd.edu/~cberry/ La Jolla, San Diego 92093-0717
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