Create a reference to a layer for use in other filters
This function is basically synonymous with with_raster() but exist to make
the intend of marking a layer with a specific id clear.
as_reference(x, id = NULL, include = is.null(id))
x |
A ggplot2 layer object, a ggplot, a grob, or a character string naming a filter |
id |
A string identifying this layer for later use |
include |
Should the layer itself be included in the graphic |
Depending on the input, either a grob, Layer, list of Layers,
guide, or element object. Assume the output can be used in the same
context as the input.
Other layer references:
as_colourspace(),
as_group()
library(ggplot2)
ggplot() +
as_reference(
geom_point(aes(20, 300), size = 100, colour = 'white'),
id = 'mask_layer'
) +
with_mask(
geom_point(aes(mpg, disp), mtcars, size = 5),
mask = 'mask_layer'
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