panel.hexgrid: Hexagonal grid for a lattice plot
Description
A panel function to add a hexagonal grid to a lattice plot.
Usage
panel.hexgrid(h, border = grey(0.85))
Arguments
h
an object of class hexbin.
border
a color for the hexagon border colors
Value
There is no return value from this function. The results are plotted on
the current active device.