Hoi Peter,
--On woensdag 16 juni 2004 17:35 +0200 Peter Dalgaard <[EMAIL PROTECTED]> wrote:
Anyways, the way out is
d2 <- subset(dd,c==1) ifac <- sapply(dd,is.factor) d2[ifac] <- lapply(d2[ifac],factor)
or
d2 <- subset(dd,c==1) d2[] <- lapply(d2, function(x) if (is.factor(x)) factor(x) else x)
My toolbox.r now contains:
my.subset <- function(x, drop.unused.levels=FALSE, ...) {
subsetted <- subset(x, ...) if (drop.unused.levels) {
subsetted[] <- lapply(subsetted,
function(x) if (is.factor(x)) factor(x) else x)
}subsetted }
Thnx for all the help!
-- Paul Lemmens NICI, University of Nijmegen ASCII Ribbon Campaign /"\ Montessorilaan 3 (B.01.05) Against HTML Mail \ / NL-6525 HR Nijmegen X The Netherlands / \ Phonenumber +31-24-3612648 Fax +31-24-3616066
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