Extract plot components from a ggplot or gtable. get_plot_component()
extracts grobs or a list of grobs. plot_component_names() provides the
names of the components in the plot. plot_components() returns all
components as a list.
get_plot_component(plot, pattern, return_all = FALSE)
plot_component_names(plot)
plot_components(plot)A ggplot or gtable to extract from.
The name of the component.
If there is more than one component, should all be returned
as a list? Default is FALSE.
A grob or list of grobs (get_plot_component(), plot_components())
or a character vector (plot_component_names())