Hi Torsten (et al),
>>>>> "Torsten" == Torsten Hothorn <[EMAIL PROTECTED]>
>>>>> on Fri, 12 Mar 2004 15:48:00 +0100 (CET) writes:
Torsten> Hi,
Torsten> currently the "label" and "edgetext" attributes of
Torsten> a dendrogram are coerced to character before they
Torsten> are added to a plot with `text'. Is there a
Torsten> specific reason to do so (expect for the
Torsten> determination of the size of the character string
Torsten> to be plotted)?
that used to be a reason AFAIR but nowadays, strwidth() and strheight()
do work correctly with expressions and also do an "internal as.character()"
as well.
Also, text() typically coerces its 'labels' argument to
character though text() is generic nowadays, and the coercion is
not really guaranteed.
For compatibilty & "safety" reasons,
it might be better to keep do as.character() *unless* the
attributes are of mode "expression" ...
Other opionions?
Torsten> Otherwise one could plot the attributes directly via
Torsten> diff dendrogram.R /usr/src/R/src/library/stats/R/dendrogram.R
Torsten> 317c317
Torsten> < text(xBot, yBot + vln, attr(child,"label"))
Torsten> ---
>> text(xBot, yBot + vln, nodeText)
Torsten> 337c337
Torsten> < text(mx, my, attr(child, "edgetext"))
Torsten> ---
>> text(mx, my, edgeText)
Torsten> 344c344
Torsten> < text(xBot, my, attr(child, "edgetext"))
Torsten> ---
>> text(xBot, my, edgeText)
Torsten> and one could use expressions for plotting symbols.
yes, that's a good idea and will be allowed in 1.9.0
Martin Maechler <[EMAIL PROTECTED]> 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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