Graphics with the mosaic and lattice packages

Randall Pruim

August, 2014

This vignette is simply a suite of plots that exist primarily as part of our quality control for the package. But since the examples might be useful to others as well, we’ve added this as a vignette in the package.

You might also like to see the vignette that compares using lattice to using ggformula, a formula interface to ggplot2.

lattice extras

The mosaic package resets the default panel function for histograms. This changes the default for bin selection and provides some additional arguments to histogram.

histogram(~ rbinom( 500, 20, .3), width=1, fit="normal", v=c(6,10), h=0.1 )

ladd()

ladd() provides a relatively easy way to add additional things to a lattice graphic.

xyplot( rnorm(100) ~ rnorm(100) )
ladd( grid.text("Here is some text", x=0, y=0, default.units="native") )
ladd( panel.abline( a=0, b=1, col="red", lwd=3, alpha=.4 ) )
ladd( panel.rect(x=-1, y=-1, width=1, height=1, col="gray80", fill="lightsalmon"))
ladd( panel.rect(x=0, y=0, width=2, height=2, col="gray80", fill="lightskyblue"), 
      under=TRUE)

mplot()

In addition to the interactive uses of mplot(), it can be used in place of plot() in several settings.

require(gridExtra)
mod <- lm(width ~ length * sex, data = KidsFeet)
mplot(mod, which = 1:7, multiplot = TRUE, ncol = 2)