lme4 (version 1.1-11)

plots.thpr: Mixed-Effects Profile Plots (Regular / Density / Pairs)

Description

Xyplot, Densityplot, and Pairs plot methods for a mixed-effects model profile.

xyplot() draws zeta diagrams, also visualizing confidence intervals and their asymmetry.

densityplot() draws the profile densities.

splom() draws profile pairs plots. Contours are for the marginal two-dimensional regions (i.e. using df = 2).

Usage

## S3 method for class 'thpr':
xyplot(x, data = NULL,
       levels = sqrt(qchisq(pmax.int(0, pmin.int(1, conf)), df = 1)),
       conf = c(50, 80, 90, 95, 99)/100,
       absVal = FALSE, scales=NULL,
       which = 1:nptot, ...)
## S3 method for class 'thpr':
densityplot(x, data, \dots)
## S3 method for class 'thpr':
splom(x, data,
      levels = sqrt(qchisq(pmax.int(0, pmin.int(1, conf)), 2)),
      conf = c(50, 80, 90, 95, 99)/100,  which = 1:nptot,
      draw.lower = TRUE, draw.upper = TRUE, ...)

Arguments

x

a mixed-effects profile, i.e., of class "thpr", typically resulting from profile(fm) where fm is a fitted model from lmer (or

data

unused - only for compatibility with generic.

levels

the contour levels to be shown; usually derived from conf.

conf

numeric vector of confidence levels to be shown as contours.

absVal

logical indicating if abs(.)olute values should be plotted, often preferred for confidence interval visualization.

scales

plotting options to be passed to xyplot

which

integer or character vector indicating which parameters to profile: default is all parameters (see profile-methods for details).

draw.lower

(logical) draw lower-triangle (zeta scale) panels?

draw.upper

(logical) draw upper-triangle (standard dev/cor scale) panels?

...

further arguments passed to xyplot, densityplot, or splom from package lattice, respecti

Value

• [object Object],[object Object],[object Object]

See Also

profile, notably for an example.

Examples

## see   example("profile.merMod")