>>>>> "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.
<...example deleted..>
yes, this time your message has been very useful;
thank you, Mikkel!
Indeed, there is a (at least one!) problem in the "dendrogram"
class/methods, currently --- which might not be so astonishing,
given the following excerpt from its documentation :
>> dendrogram package:mva R Documentation
>>
>> General Tree Structures
>>
>> Description:
>>
>> Class `"dendrogram"' provides general functions for
handling
>> tree-like structures. It is intended as a replacement for
similar
>> functions in hierarchical clustering and
classification/regression
>> trees, such that all of these can use the same engine for
plotting
>> or cutting trees. Currently the code is in alpha stage and the
API
>> may change at any point in time.
>> .............
>> Details:
>>
>> Warning: This documentation is preliminary.
Really, it has been on my todo list to look into this, and at least
provide a few more methods, e.g. print(), str(), and maybe "[",
"[[".
Also, as.dendrogram.<class> for "tree" and/or "rpart"
and "VLMC"
objects.
As you may have read above, we have not even settled about
several details. {suggestions are welcome!}
BTW, in your example, even the first cut() result couldn't be
plotted any more.
We will look into this.
Thanks for the report!
Martin Maechler <maechler@stat.math.ethz.ch>
http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum LEO C16 Leonhardstr. 27
ETH (Federal Inst. Technology) 8092 Zurich SWITZERLAND
phone: x-41-1-632-3408 fax: ...-1228 <><
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