ggplot2 (version 0.9.0)

annotation_raster: Annotation: High-performance rectangular tiling.

Description

This is a special version of geom_raster optimised for static annotations that are the same in every panel. These annotations will not affect scales (i.e. the x and y axes will not grow to cover the range of the raster, and the raster must already have its own colours).

Usage

annotation_raster(raster, xmin, xmax, ymin, ymax)

Arguments

raster

raster object to display

xmin,xmax

x location (in data coordinates) giving horizontal location of raster

ymin,ymax

y location (in data coordinates) giving vertical location of raster

Details

Most useful for adding bitmap images.

Examples

# Generate data
rainbow <- matrix(hcl(seq(0, 360, length = 50 * 50), 80, 70), nrow = 50)
qplot(mpg, wt, data = mtcars) +
  annotation_raster(rainbow, 15, 20, 3, 4)
# To fill up whole plot
qplot(mpg, wt, data = mtcars) +
  annotation_raster(rainbow, -Inf, Inf, -Inf, Inf) +
  geom_point()