Annotation: High-performance rectangular tiling.

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.

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).

Details

Most useful for adding bitmap images.

Examples

# Generate data rainbow <- matrix(hcl(seq(0, 360, length.out = 50 * 50), 80, 70), nrow = 50) ggplot(mtcars, aes(mpg, wt)) + geom_point() + annotation_raster(rainbow, 15, 20, 3, 4)

# To fill up whole plot ggplot(mtcars, aes(mpg, wt)) + annotation_raster(rainbow, -Inf, Inf, -Inf, Inf) + geom_point()

rainbow2 <- matrix(hcl(seq(0, 360, length.out = 10), 80, 70), nrow = 1) ggplot(mtcars, aes(mpg, wt)) + annotation_raster(rainbow2, -Inf, Inf, -Inf, Inf) + geom_point()

rainbow2 <- matrix(hcl(seq(0, 360, length.out = 10), 80, 70), nrow = 1) ggplot(mtcars, aes(mpg, wt)) + annotation_raster(rainbow2, -Inf, Inf, -Inf, Inf, interpolate = TRUE) + geom_point()