A layer is a combination of data, stat and geom with a potential position
adjustment. Usually layers are created using
calls but it can also be created directly using this function.
layer( geom = NULL, stat = NULL, data = NULL, mapping = NULL, position = NULL, params = list(), inherit.aes = TRUE, check.aes = TRUE, check.param = TRUE, show.legend = NA, key_glyph = NULL, layer_class = Layer )
The geometric object to use display the data
The statistical transformation to use on the data for this layer, as a string.
The data to be displayed in this layer. There are three options:
Set of aesthetic mappings created by
Position adjustment, either as a string, or the result of a call to a position adjustment function.
Additional parameters to the
logical. Should this layer be included in the legends?
A legend key drawing function or a string providing the
function name minus the
The type of layer object to be constructued. This is intended for ggplot2 internal use only.
# shortcut for ggplot(mpg, aes(displ, hwy)) + layer(geom = "point", stat = "identity", position = "identity", params = list(na.rm = FALSE) )# use a function as data to plot a subset of global data ggplot(mpg, aes(displ, hwy)) + layer(geom = "point", stat = "identity", position = "identity", data = head, params = list(na.rm = FALSE) )