a object of class "hexbin", typically produced by
hexbin(*).
xbnds, ybnds
horizontal and vertical limits of the binning
region in x or y units respectively; must be numeric vector of
length 2.
xbins
the number of bins partitioning the range of xbnds.
shape
the shape = yheight/xwidth of the plotting regions.
add
a logical value indicating whether or not to add the grid
to the current plot.
fill.edges
integer number of hexagons to add around the border
fill
the fill color for the hexagons
border
the color of the border of the hexagons
edge.add
offset (typically fill.edges above) used in
hgridcent.
Value
Invisibly returns a list with th following components
x
The x coordinates of the grid
y
the y coordinates of the grid
dimen
a vector of length 2 gining the rows and columns of the grid
dx
the horizontal diameter of the hexagons
dy
the vertical diameter of the hexagons
Details
If a hexbin object is given then the parameters xbins and shape are
ignored. Different bounds can still be specified. The fill.edges
parameter should be an integer. fill.edges takes the current
grid and adds a layer of hexagons around the grid for each level of
fill. So for example if fill.edges= 2 than the dimensions of
the grid would be (i,j)+4.
hgridcent() is the utility function computing the resulting
list (see section “Value”).
WARNING! If using a hexVP be sure to set clip to "on", otherwise the
hexagon grid will bleed over the plot edges.