How to transform dot scatter plot into density?

Question

How to transform dot scatter plot into density?

I would like to know how to turn a dot scatter plot into a dot density plot in the region, for example, where there are few points the color of the region will be light, where there are many points the color of the region will be darker. Grateful!

3

r plot gráfico gráfico-de-dispersão

Author: Geólogo, 2016-02-05

Source

1 answers

score 3 · Accepted Answer

Using the ggplot2 the following scatter plot:

library(ggplot2)
ggplot(faithful, aes(x = eruptions, y = waiting)) +
  geom_point() +
  xlim(0.5, 6) +
  ylim(40, 110)

Can look like this, just by swapping the line geom_point:

ggplot(faithful, aes(x = eruptions, y = waiting)) +
  stat_density_2d(aes(fill = ..level..), geom = "polygon") +
  xlim(0.5, 6) +
  ylim(40, 110)

You can also do it like this:

ggplot(faithful, aes(x = eruptions, y = waiting)) +
  geom_bin2d() + 
  xlim(0.5, 6) +
  ylim(40, 110)