annotation_raster {ggplot2} | R Documentation |
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).
annotation_raster(raster, xmin, xmax, ymin, ymax, interpolate = FALSE)
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 |
Most useful for adding bitmap images.
# 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()