Proper number of bins in stat_contour()

[clauswilke]

Fixes #3879.

library(ggplot2)

p <- ggplot(faithfuld, aes(waiting, eruptions, z = density))

p + geom_contour_filled(bins = 3)

p + geom_contour_filled(bins = 5)

^{Created on 2020-04-30 by the reprex package (v0.3.0)}

[clauswilke]

It looks like documentation hadn't been regenerated recently, so this pulled in a few unrelated documentation updates.

[thomasp85]

LGTM

[tjebo]

Thanks for your reply in issue #4003.

Using your very example from here, I still struggle to find the expected number of bins with stat_density_2d - using the current master

library(ggplot2)

ggplot() + 
  geom_contour_filled(data = faithfuld, aes(waiting, eruptions, z = density), bins = 3, alpha = 0.5) +
  stat_density_2d(data = faithful, aes(waiting, eruptions), bins = 3, color = "black", size = 1)

^{Created on 2020-05-15 by the reprex package (v0.3.0)}

Session info

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