annotation_raster

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Annotation: High-performance rectangular tiling.

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,
    interpolate = FALSE)
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
interpolate
If TRUE interpolate linearly, if FALSE (the default) don't interpolate.
Details

Most useful for adding bitmap images.

Aliases
  • annotation_raster
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()

rainbow2 <- matrix(hcl(seq(0, 360, length = 10), 80, 70), nrow = 1)
qplot(mpg, wt, data = mtcars) +
  annotation_raster(rainbow2, -Inf, Inf, -Inf, Inf) +
  geom_point()
rainbow2 <- matrix(hcl(seq(0, 360, length = 10), 80, 70), nrow = 1)
qplot(mpg, wt, data = mtcars) +
  annotation_raster(rainbow2, -Inf, Inf, -Inf, Inf, interpolate = TRUE) +
  geom_point()
Documentation reproduced from package ggplot2, version 0.9.3.1, License: GPL-2

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