Can we please apply the following patch? It fixes the following problem
I already reported:
************************************************************************
There is a problem with tapply() in the case where INDEX is a factor
with at least one of its levels not occurring in it.
In this case,
namelist[[i]] <- levels(index)
gets all levels but
group <- group + ngroup * (codes(index) - 1)
only those occurring in index, which subsequently causes
names(ans) <- namelist[[1]]
to fail.
For example,
R> f <- factor(c("a", "a", "b"), levels =
letters[1:3])
R> f
[1] a a b
R> codes(f)
[1] 1 1 2
R> levels(f)
[1] "a" "b" "c"
which gives e.g.
R> tapply(rep(1, length(f)), f, sum)
Error: names attribute must be the same length as the vector
************************************************************************
Thanks,
-k
--- src/library/base/funs/tapply.orig Fri Feb 7 01:08:31 1997
+++ src/library/base/funs/tapply Sun Aug 10 21:57:31 1997
@@ -14,7 +14,7 @@
index <- as.factor(INDEX[[i]])
if (length(index) != nx)
stop("arguments must have same length")
- namelist[[i]] <- levels(index)
+ namelist[[i]] <- unique(levels(index)[index])
extent[[i]] <- nlevels(index)
group <- group + ngroup * (codes(index) - 1)
ngroup <- ngroup * nlevels(index)
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To:
r-devel-request@stat.math.ethz.ch
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-