On Thu, 13 Dec 2001 JRoyRobertson@rohmhaas.com wrote:
> I am using 6.0 Professional on Windows 2000. As I understand it
> "plot.loadings" is a method for plot. However,
> the command >existsMethod("plot",signature(x="loadings")) returns "F".
> Please explain. Thanks
existsMethod tells you about S4-style formal methods, not S3-style
informal methods, such as plot.loadings()
There's a lot going here, especially with plot() which supports both.
Compare
> methods("plot")
with
> showMethods("plot")
to see the two sets.
For more explanation, see the Green Book (JMC, 1998) or `S Programming'.
--
Brian D. Ripley, ripley@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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