dp.ME.pchange {influence.ME}R Documentation

Dotplot visualization of percentile change as measure of influential data

Description

This is a wrapper function to the dotplot() function in the lattice-package. It transforms the output from the ME.pchange() function and calls dotplot() to provide the user with a visualization of the percentile changes in mixed models due to the neutralization of the influence of grouping factors.

Usage

dp.ME.pchange(estex, parameters = 0, groups = 0, sort=FALSE, to.sort=NA, abs=FALSE, ...)

Arguments

estex An object as returned by the estex() function, containing the altered estimates of a mixed effects regression model.
parameters Used to define a selection of parameters. If parameters = 0 (default), values for percentile change are visualized for parameters in the model.
groups Used to define a selection of nesting groups that should be visualized. If groups = 0 (default), the percentile changes for all nesting groups are shown.
sort If sort=TRUE the values of percentile change are ordered based on magnitude before visualization. If sort=FALSE (default) no sorting takes place.
to.sort Specify on which variable the percentile changes must be sorted. If only one variable present (either in the model, or due to the selection specified in parameters), this parameter can be omitted. If multiple variables are visualized, and sort=TRUE, specification of to.sort is required, or an error is returned.
abs If abs=TRUE, the absolute values of percentile change are visualized, while if abs=FALSE (default), both positive and negative percentages are possible. If both abs=TRUE and sort=TRUE, the abs parameters precedes the sort parameter, and thus the absolute values of percentile change are sorted.
... Further arguments passed on to the dotplot() function.

Author(s)

Rense Nieuwenhuis, Ben Pelzer, Manfred te Grotenhuis

See Also

estex, ME.pchange

Examples

data(school23)
model <- lmer(math ~ structure + SES  + (1 | school.ID), data=school23)

alt.est <- estex(model, "school.ID")
dp.ME.pchange(alt.est)
dp.ME.pchange(alt.est, layout=c(1,3))

[Package influence.ME version 0.6.1 Index]