geom_scattermost {scattermore}

geom_scattermost

Description

Totally non-ggplotish version of geom_scattermore(), but faster. It avoids most of the ggplot processing by bypassing the largest portion of data around any ggplot functionality, leaving only enough data to set up axes and limits correctly. If you need to break speed records, use this.

Usage

geom_scattermost(
  xy,
  color = "black",
  interpolate = FALSE,
  pointsize = 0,
  pixels = c(512, 512)
)

Arguments

xy

2-column object with data, as in scattermore().

color

Color vector (or a single color).

interpolate

Default FALSE, passed to grid::rasterGrob().

pointsize

Radius of rasterized point. Use 0 for single pixels (fastest).

pixels

Vector with X and Y resolution of the raster, default c(512,512).

Examples

library(ggplot2)
library(scattermore)
d <- data.frame(x = rnorm(1000000), y = rnorm(1000000))
x_rng <- range(d$x)
ggplot() +
  geom_scattermost(cbind(d$x, d$y),
    color = heat.colors(100, alpha = .01)
    [1 + 99 * (d$x - x_rng[1]) / diff(x_rng)],
    pointsize = 2.5,
    pixels = c(1000, 1000),
    interpolate = TRUE
  )