On Wed, 31 Jan 2007, Michael Reinecke wrote:
Dear all,
I tried out the example in the help document for mca (the multiple
correspondence analysis of the MASS package):
farms.mca <- mca(farms, abbrev=TRUE)
farms.mca
plot(farms.mca)
But the graphic that I get seems unfeasible to me: I cannot recognize
the numbers (printed in black) because they are all overlapping and
concealing each other. I don ´t dare using my own data, which consist of
several hundred cases - I guess I won ´t see anything.
How can I solve this? Thank you for any idea!
Some levels do overplot, as they are identical (this is an unusual
example). But as you see in the book, not many, and you can
adjust pointsize of your device or 'cex' to mitigate the problem.
Plotting the rows is optional: see the help page. I would not recommend
plotting rows for several hundred cases.
--
Brian D. Ripley, [EMAIL PROTECTED]
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 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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