Plot Diagnostics for an lm model

This function creates a number of diagnostic plots from lm models.

Usage

# S3 method for modelDiagnostics.lm
plot(x, y, plot = TRUE, ask = TRUE, ncol, ...)

Arguments

x

A modelDiagnostics class object from lm.

y

Included to match the generic. Not used.

plot

A logical value whether or not to plot the results or simply return the graaphical objects.

ask

A logical whether to ask before changing plots. Only applies to interactive environments.

ncol

The number of columns to use for plots. Missing by default which means individual plots are created. If specified, plots are put together in a grid.

...

Included to match the generic. Not used.

Value

a list including plots of the residuals, residuals versus fitted values

Examples

testm <- stats::lm(mpg ~ hp * factor(cyl), data = mtcars)

md <- modelDiagnostics(testm, ev.perc = .1)
#> Warning: singularity problem
#> Warning: tiny diagonals replaced with Inf when calling blkfct
#> Warning: singularity problem
#> Warning: tiny diagonals replaced with Inf when calling blkfct

plot(md)


plot(md, ncol = 2)


## clean up
rm(testm, md)