Message-ID: <1197940463.47671eef4045e@webmail.fas.harvard.edu>
Date: 2007-12-18T01:14:23Z
From: Wayne Aldo Gavioli
Subject: Scatterplot Showing All Points
Hello all,
I'm trying to graph a scatterplot of a large (5,000 x,y coordinates) of data
with the caveat that many of the data points overlap with each other (share the
same x AND y coordinates). In using the usual "plot" command,
> plot(education, xlab="etc", ylab="etc")
it seems that the overlap of points is not shown in the graph. Namely, there
are 5,000 points that should be plotted, as I mentioned above, but because so
many of the points overlap with each other exactly, only about 50-60 points are
actually plotted on the graph. Thus, there's no indication that Point A shares
its coordinates with 200 other pieces of data and thus is very common while
Point B doesn't share its coordinates with any other pieces of data and thus
isn't common at all. Is there anyway to indicate the frequency of such points
on such a graph? Should I be using a different command than "plot"?
Thanks,
Wayne