2d bin counts: geom_bin_2d

Mix.install([
  {:giggly, path: Path.join(__DIR__, "..")},
  {:kino, "~> 0.19"}
  ])

About this notebook

This notebook follows the examples on ggplot2's reference page for geom_bin_2d(), which covers stat_bin_2d() too, in the order the page gives them. Each example shows ggplot2's code first and then Giggly's. An example Giggly cannot draw yet keeps its ggplot2 code and names what it is waiting for, so the page is also a list of what remains.

geom_bin_2d() divides the plane into rectangles, counts the rows in each, and maps each count to its rectangle's fill: a heatmap, useful where too many points overlap to read. stat_bin_2d() does the counting, in 30 bins each way unless told a number of bins or their width, which can differ between the two directions. Giggly has none of this yet.

Counting in rectangles

d <- ggplot(diamonds, aes(x, y)) + xlim(4, 10) + ylim(4, 10)
d + geom_bin_2d()

Not in Giggly yet: geom_bin_2d().

The number of bins

# You can control the size of the bins by specifying the number of
# bins in each direction:
d + geom_bin_2d(bins = 10)
d + geom_bin_2d(bins = list(x = 30, y = 10))

Not in Giggly yet: geom_bin_2d() and its bins option.

The width of the bins

# Or by specifying the width of the bins
d + geom_bin_2d(binwidth = c(0.1, 0.1))

Not in Giggly yet: geom_bin_2d() and its binwidth option.