Creates an empty, 2-dimensional, coordinate axes using ggplot2: no
scales, no tick marks, no axis labels.
put_axes(quadrant = NULL, col = NULL, size = NULL)The empty axes.
: The quadrant to plot, 1, 2, 3, 4, or 0 for all four. Default is the first quadrant.
: Line color, default is "gray60".
: Line width, default is 0.5.
The size of the figure is determined when printed, e.g., using knitr
in an R Markdown script, the figure height in inches is set with the
fig.height code chunk option.