optShape
Optimal Shape Parameter for Hexbin Viewport
Takes a viewport or a given height and width and returns the shape parameter that will fill the specified plotting region with the appropriately shaped hexagons. If margins are specified the margins are subtracted from height and width before the shape parameter is specified.
- Keywords
- dplot
Usage
optShape(vp, height = NULL, width = NULL, mar = NULL)Arguments
- vp
a
viewportobject, optional see details- height
the height of the plotting region, can be numeric or units
- width
The width of the plotting region, can be numeric or units
- mar
A four element numeric or units vector describing the margins in the order
c(bottom, left, top, right)
Value
a scalar numeric value specifiyng shape.
Warning
If a viewport is given as an argument it should already be pushed on the graphics device or it will have null units and a meaningless shape parameter will be returned.
See Also
Examples
library(hexbin)
# NOT RUN {
x <- rgamma(10000,.9)
m <- as.logical(rbinom(10000,1,.17))
x[m] <- -x[m]
y <- rnorm(x,abs(x))
library("grid")
vp <- plotViewport(xscale= range(x)+c(-.5,.5),
yscale= range(y)+c(-.5,.5),
default.units = "native")
grid.newpage()
pushViewport(vp)
grid.rect()
shape <- optShape(vp)
shape
hb <- hexbin(x,y,xbins=40,shape=shape)
grid.hexagons(hb,colramp=BTY)
# }