lmplot2: Plots to assess the goodness of fit for the linear model...

In gplots: Various R Programming Tools for Plotting Data

Description

Plots to assess the goodness of fit for the linear model objects

Usage

   lmplot2(
            x,
            which = 1:5,
            caption = c("Residuals vs Fitted", "Normal Q-Q plot",
              "Scale-Location plot", "Cook's distance plot"),
            panel = panel.smooth,
            sub.caption = deparse(x$call),
            main = "",
            ask = interactive() && nb.fig < length(which)
            && .Device != "postscript",
            ...,
            id.n = 3,
            labels.id = names(residuals(x)),
            cex.id = 0.75,
            band=TRUE,
            rug=TRUE,
            width=1/10,
            max.n=5000
            )

Arguments

x	lm object
which	Numerical values between 1 and 5, indicating which plots to be shown. The codes are: 1 Fitted vs residuals 2 Normal Q-Q 3 Scale-Location 4 Cook's distance 5 Residuals vs. predictor
caption	Caption for each type of plot
panel	function to draw on the existing plot
sub.caption	SubCaption for the plots
main	Main title of the plot
ask	whether interactive graphics
...	parameters passed to lmplot2.
id.n	integer value, less than or equal to residuals of lm object
labels.id	Names of the residuals of the lm object
cex.id	Parameter to control the height of text stringsx
band	logical vector indicating whether bandplot should also be plotted
rug	logical vector indicating whether rug should be added to the existing plot
width	Fraction of the data to use for plot smooths
max.n	Maximum number of points to display in plots

Note

This function replaces plot.lm2, which has been deprecated to avoid potential problems with S3 method dispatching.

Author(s)

Gregory R. Warnes [e-mail] and Nitin Jain [e-mail]

See Also

plot.lm

Examples

ctl <- rnorm(100, 4)
trt <- rnorm(100, 4.5)
group <- gl(2,100,200, labels=c("Ctl","Trt"))
weight <- c(ctl, trt)
wt.err <- rnorm(length(weight), mean=weight, sd=1/2)
x <- lm(weight ~ group + wt.err)

lmplot2(x)

lmplot2(x, which=1,   width=1/3)
lmplot2(x, which=1:3, width=1/3)

Example output

Attaching package: 'gplots'

The following object is masked from 'package:stats':

    lowess

gplots documentation built on May 2, 2019, 5:50 p.m.