add_ref_boxes: Add reference boxes around each cell of the glyphmap.
Description
Add reference boxes around each cell of the glyphmap.
Usage
add_ref_boxes(data, var_fill = NULL, color = "white", size = 0.5, fill = NA, ...)
Arguments
data
A glyphmap structure.
var_fill
Variable name to use to set the fill color
color
Set the color to draw in, default is "white"
size
Set the line size, default is 0.5
fill
fill value used if var_fill
is NULL