[R] number plot symbol in scatterplot?
Thomas W Blackwell
tblackw at umich.edu
Fri Jan 3 16:36:02 CET 2003
Bill -
The behavior of the old-S function printer() was to count overstrikes
in the way you describe. This was a non-graphics output device which
would make a crude scatterplot using ascii characters (spaces and
asterisks, for example) in response to "plot()" commands.
I've looked for "printer" in help(Devices) and I don't find it.
Non-graphics scatterplots probably haven't been implemented for R
yet, and probably aren't a high priority. I think you'll have to
count the overstrikes at each location yourself (hash the x-y
coordinates), and then use the function text() to plot the
appropriate symbol at each x-y location.
- tom blackwell - university of michigan medical - ann arbor -
On Fri, 3 Jan 2003, Simpson, William wrote:
> If I make a scatterplot and several (e.g. 5) points lie on top of each other
> at a given x,y location I would like the plot symbol to be the number of
> superimposed points (e.g. "5"). Could someone please tell me how to do this
> in R? Thanks!
>
> Bill Simpson
>
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