Using transparency for data count intuition

September 27, 2011
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(This article was first published on Jesse S.A. Bridgewater » rstats, and kindly contributed to R-bloggers)

This is an illustration of representing point count in a graphic using transparency. This is easy to do in ggplot2 if you use one of the barchart type of geoms.  However I think there are other situations where it would be useful to apply aesthetics based on point count. Since Hadley did a lot of [...]

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