It is possible to use automatically determined grid lines (x=NULL, y=NULL) or specifying the number
of cells x = 3, y = 4 as done by grid. Additionally, x- and y-locations of grid-lines can be specified,
e.g. x = 1:10, y = seq(0,10,2).
addGrid(x = NULL, y = NULL, col = "lightgray", lwd = 1L, lty = 3L)(integer, numeric) single integer specifies number of cells, numeric vector specifies vertical grid-lines
(integer, numeric) single integer specifies number of cells, numeric vector specifies horizontal grid-lines
(character) color of grid-lines
(integer) line width of grid-lines
(integer) line type of grid-lines
Andre Schuetzenmeister andre.schuetzenmeister@roche.com