| grid.grill {grid} | R Documentation | 
This function draws a grill within a Grid viewport.
grid.grill(h = unit(seq(0.25, 0.75, 0.25), "npc"),
           v = unit(seq(0.25, 0.75, 0.25), "npc"),
           default.units = "npc", gp=gpar(col = "grey"), vp = NULL)
h | 
 A numeric vector or unit object indicating the horizontal location of the vertical grill lines.  | 
v | 
 A numeric vector or unit object indicating the vertical location of the horizontal grill lines.  | 
default.units | 
 A string indicating the default units to use
if   | 
gp | 
 An object of class   | 
vp | 
 A Grid viewport object.  | 
None.
Paul Murrell