DAMisc (version 1.3)

prepanel.ci: Lattice prepanel function for confidence intervals

Description

This prepanel function is defined so as to allow room for all confidence intervals plotted in a lattice display. Note, both lower and upper must be passed directly to xyplot as they will be passed down to the prepanel function.

Usage

prepanel.ci(x,y,subscripts, lower,upper)

Arguments

x,y

Data from the call to xyplot.

subscripts

Variable used to created the juxtaposed panels.

lower, upper

95% lower and upper bounds of y.

Value

• A list giving the ranges and differences in ranges of x and the lower and upper bounds of y.

Examples

library(car)
library(lattice)
data(Ornstein)
mod <- lm(interlocks ~ log(assets)*nation, data=Ornstein)
mod.out <- intQualQuant(mod, c("log(assets)", "nation"), 
	n=25, plot=FALSE, type="facs")
xyplot(fit ~ x | contrast, data=mod.out, 
	xlab = "Assets", ylab = "Difference In Fitted Values", 
	lower=mod.out$lower, upper=mod.out$upper, zl=TRUE, 
	prepanel=prepanel.ci, panel=panel.ci)