The graphics are actually
self-explanatory. For basic R graphics use brackets
function. For grid based graphics (ggplot2) use the
grid.brackets function.
Different kinds of brackets
Get a specific bracket with use of different arguments.
Direction of brackets
Two ways to change direction of brackets.
Set ticks argument
Different kinds of ticks and brackets without ticks.
Curvature argument
Curvature argument with different types of brackets.