gradient breaks in a ggplot stat_bin2d plot

Question

I have a 2d histogram created with stat_bin2d in the ggplot2 package. I\'d like to control both the number of breaks in the color gradient, as well

Answer 1

Me thinks you probably want the less talked about cousin of scale_colour_gradient2(), scale_fill_gradient2()

Using your data:

p + scale_fill_gradient2(breaks=c(1,2,3,4,5,6))

Also note the optional parameters low, mid, and high for additional controls.

Answer 2

here is an example combining cut and bin2d:

p <- ggplot(df, aes(x, y, fill=cut(..count.., c(0,6,8,9,Inf))))
p <- p + stat_bin2d(bins = 20)
p + scale_fill_hue("count")

As there are many ways to make the breaks arbitrary, if you define clearly what you want, probably you can get a better answer.