Plot random effects and interactions for lmer objects

Takes object produced by lme4::lmer() function, extracts random effects and interactions, and returns ggplot2-based plots to examine.

Usage

random_plot(lmer.fit, optional.names = NA, facets = FALSE, print = T)

Arguments

lmer.fit: A mer object
optional.names: A named vector of random effects, where names indicate terms and values are used as axis x labels in correspomding plot. The length should be equal to a number of random effects. Usually it includes "(Intercepts)" and names of variables whose effects are made random.
facets: Logical. Should the random effects be plotted in facets or as a series of single plots?
print: If the plots should be actually printed, valid only if facets = F

Value

Returns one or several ggplots. In case one plot is returned it can be appended with `theme`, `geom_`, etc.

Examples

if (FALSE) { # \dontrun{
random_plot(lmr,
   optional.names=c(`(Intercepts)`="Intercepts",
   gndr ="Female", s.Age = "Effects of age"),
   facets=TRUE)
   } # }