build_ggplot() takes the plot object, and performs all steps necessary
to produce an object that can be rendered. This function outputs two pieces:
a list of data frames (one for each layer), and a panel object, which
contain all information about axis limits, breaks etc. The ggplot_build()
function is vestigial and build_ggplot() should be used instead.
Usage
ggplot_build(plot, ...)
get_layer_data(plot = get_last_plot(), i = 1L)
layer_data(plot = get_last_plot(), i = 1L)
get_panel_scales(plot = get_last_plot(), i = 1L, j = 1L)
layer_scales(plot = get_last_plot(), i = 1L, j = 1L)
get_layer_grob(plot = get_last_plot(), i = 1L)
layer_grob(plot = get_last_plot(), i = 1L)Arguments
- plot
ggplot object
- ...
Not currently in use.
- i
An integer. In
get_layer_data(), the data to return (in the order added to the plot). Inget_layer_grob(), the grob to return (in the order added to the plot). Inget_panel_scales(), the row of a facet to return scales for.- j
An integer. In
get_panel_scales(), the column of a facet to return scales for.
Details
get_layer_data(), get_layer_grob(), and get_panel_scales() are helper
functions that return the data, grob, or scales associated with a given
layer. These are useful for tests.
See also
print.ggplot() and benchplot() for
functions that contain the complete set of steps for generating
a ggplot2 plot.
The build step section of the online ggplot2 book.