plot.intervals.lmList: Plot lmList Confidence Intervals

Description

A Trellis dot-plot of the confidence intervals on the linear model coefficients is generated, with a different panel for each coefficient. Rows in the dot-plot correspond to the names of the lm components of the lmList object used to produce x. The lower and upper confidence limits are connected by a line segment and the estimated coefficients are marked with a "+".

This is based on function dotplot() from package lattice.

Usage

# S3 method for intervals.lmList
plot(x, xlab = "", ylab = attr(x, "groupsName"),
     strip = function(...) strip.default(..., style = 1),
     ...)

Value

a Trellis plot with the confidence intervals on the coefficients of the individual lm components of the lmList that generated x.

Arguments

x: an object inheriting from class "intervals.lmList", representing confidence intervals and estimates for the coefficients in the lm components of the lmList object used to produce x.
xlab, ylab: axis labels, each with a sensible default.
strip: a function or FALSE, see dotplot() from package lattice.
...: optional arguments passed to the dotplot function (see above).

Author

José Pinheiro and Douglas Bates bates@stat.wisc.edu

Examples

Run this code

fm1 <- lmList(distance ~ age | Subject, Orthodont)
plot(intervals(fm1))