[R] number plot symbol in scatterplot?
Martin Maechler
maechler at stat.math.ethz.ch
Fri Jan 3 16:30:03 CET 2003
>>>>> "BillS" == Simpson, William <William.Simpson at drdc-rddc.gc.ca>
>>>>> on Fri, 3 Jan 2003 09:41:32 -0500 writes:
BillS> If I make a scatterplot and several (e.g. 5) points
BillS> lie on top of each other at a given x,y location I
BillS> would like the plot symbol to be the number of
BillS> superimposed points (e.g. "5"). Could someone please
BillS> tell me how to do this in R? Thanks!
(typical Martin's answer: ``You don't want what you are asking for'').
No, seriously, I think using sunflowerplot() {as recommended by
Chambers et al (1983) see help} is a bit better {-> ?sunflowerplot and examples}
Other solutions to the same problem:
b. use jittering jitter()
c. use a ``2d density estimate'' and plot that
1) e.g. use image on a 2d histog
2) better use the "hexbin" package from bioconductor,
this uses Dan Carr's Hexagons instead of squares and (some
more ideas).
Regards,
Martin Maechler <maechler at 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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