heatmap-esque plot for mouse clicking data

Question

I have the x and y coordinates for a whole bunch of mouse clicks. A simple scatterplot of these coordinates is below.

As you can see, obviously, there seems to be 3 areas where the clicks are relatively more concentrated. I would like to plot these clicks in a way that reflects the relative concentration of the clicks - e.g., circles in an area with a high concentration of clicks are relatively larger or have darker colors. Obviously a simple scatterplot does not show that. I tried following the following post, but result is not what I want.

So any suggestion would be greatly appreciated.

Answer 1

Any of these work for you?

## scatter
plot(quakes$long, quakes$lat)

library(hexbin)
plot(hexbin(quakes$long, quakes$lat))

library(ggplot2)
ggplot(quakes, aes(x = long, y = lat)) + stat_density2d(aes(alpha = ..level..), geom = "polygon")

ggplot(quakes, aes(x = long, y = lat)) + stat_density2d(aes(fill = ..density..), geom = "tile", contour = FALSE)

library(MASS)
filled.contour(kde2d(quakes$long, quakes$lat))