runit.drop.levels.R
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### runit.drop.levels.R
###------------------------------------------------------------------------
### What: Tests for drop.levels
### $Id: runit.drop.levels.R 993 2006-10-30 17:10:08Z ggorjan $
### Time-stamp: <2006-08-29 14:21:12 ggorjan>
###------------------------------------------------------------------------
### {{{ --- Test setup ---
if(FALSE) {
library("RUnit")
library("gdata")
}
### }}}
### {{{ --- drop.levels ---
test.drop.levels <- function()
{
f <- factor(c("A", "B", "C", "D"))[1:3]
fDrop <- factor(c("A", "B", "C"))
l <- list(f=f, i=1:3, c=c("A", "B", "D"))
lDrop <- list(f=fDrop, i=1:3, c=c("A", "B", "D"))
df <- as.data.frame(l)
dfDrop <- as.data.frame(lDrop)
checkIdentical(drop.levels(f), fDrop)
checkIdentical(drop.levels(l), lDrop)
checkIdentical(drop.levels(df), dfDrop)
}
### }}}
### {{{ Dear Emacs
## Local variables:
## folded-file: t
## End:
### }}}
###------------------------------------------------------------------------
### runit.drop.levels.R ends here