All positions are rendered and it is up to the facet to decide which to use
Usage
render_strips(x = NULL, y = NULL, labeller, theme)
Arguments
x, y
A data.frame with a column for each variable and a row for each
combination to draw
labeller
A labeller function
theme
a theme object
Value
A list with an "x" and a "y" element, each containing a "top" and
"bottom" or "left" and "right" element respectively. These contains a list of
rendered strips as gtables.