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))

Arguments

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

Value

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.

See also

Other layer references: as_colourspace(), as_group()

Examples

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' )