>>>>> "MM" == Martin Maechler
<maechler@stat.math.ethz.ch> writes:
>>>>> "MikG" == M GRUM <M.GRUM@CGIAR.ORG> writes:
MikG> I'm resending this bug report with a new example. As
MikG> seen below, cut.dendrogram gives an error message for
MikG> some heights, but not for others and with some
MikG> datasets adn not others. I can't see why.
MikG> Last time I unwittingly sent my message with HTML
MikG> formatting. This time I'm travelling and using an
MikG> e-mail system that I am unfamiliar with. As far as I
MikG> can see, I am not using HTML.
MM> <...example deleted..>
MM> yes, this time your message has been very useful;
MM> thank you, Mikkel!
MM> Indeed, there is a (at least one!) problem in the
"dendrogram"
MM> class/methods, currently --- which might not be so astonishing,
MM> given the following excerpt from its documentation :
<......>
MM> Really, it has been on my todo list to look into this, and at least
MM> provide a few more methods, e.g. print(), str(), and maybe
"[", "[[".
MM> Also, as.dendrogram.<class> for "tree" and/or
"rpart" and "VLMC"
MM> objects.
several of these will be in R-devel (to become 1.6 in fall)
MM> As you may have read above, we have not even settled about
MM> several details. {suggestions are welcome!}
MM> BTW, in your example, even the first cut() result couldn't be
MM> plotted any more.
{nonsense; cut() does not produce a dendrogram but a list
containing them!}
MM> We will look into this.
done.
The fix (now in R-patched which will become 1.5.1) is very easy:
--- src/library/mva/R/dendrogram.R.~1~ 13 Aug 2001 21:41:50
+++ src/library/mva/R/dendrogram.R 15 May 2002 09:47:50
@@ -136,7 +136,7 @@
cut.dendrogram <- function(x, h, ...)
{
- LOWER <- NULL
+ LOWER <- list()
X <- 1
--------
Martin Maechler <maechler@stat.math.ethz.ch>
http://stat.ethz.ch/~maechler/
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