form
is missing, or is given as a one-sided formula, a
Trellis dot-plot of the random effects is generated, with a different
panel for each random effect (coefficient). Rows in the dot-plot are
determined by the form
argument (if not missing) or by the row
names of the random effects (coefficients). If a single factor is
specified in form
, its levels determine the dot-plot rows
(with possibly multiple dots per row); otherwise, if form
specifies a crossing of factors, the dot-plot rows are determined by
all combinations of the levels of the individual factors in the
formula. The Trellis function dotplot
is used in this method
function. If form
is a two-sided formula, a Trellis display is generated,
with a different panel for each variable listed in the right hand side
of form
. Scatter plots are generated for numeric variables and
boxplots are generated for categorical (factor
or
ordered
) variables.# S3 method for ranef.lmList
plot(x, form, grid, control, …)
"ranef.lmList"
, representing the estimated coefficients or
estimated random effects for the lmList
object from which it was
produced.
dotplot
of the estimated
random effects (coefficients) grouped according to all combinations of
the levels of the factors named in form
is returned. Single
factors (~g
) or crossed factors (~g1*g2
) are
allowed. If given as a two-sided formula, the left hand side must
be a single random effects (coefficient) and the right hand side
is formed by covariates in x
separated by +
. A
Trellis display of the random effect (coefficient) versus the named
covariates is returned in this case. Default is NULL
, in
which case the row names of the random effects (coefficients) are
used.form
. Default is FALSE
.form
is given as a two-sided formula. The control
values are referenced by name in the control
list and only
the ones to be modified from the default need to be
specified. Available values include: drawLine
, a logical
value indicating whether a loess
smoother should be added to
the scatter plots and a line connecting the medians should be added
to the boxplots (default is TRUE
); span.loess
, used
as the span
argument in the call to panel.loess
(default is 2/3
); degree.loess
, used as the
degree
argument in the call to panel.loess
(default
is 1
); cex.axis
, the character expansion factor for
the x-axis (default is 0.8
); srt.axis
, the rotation
factor for the x-axis (default is 0
); and mgp.axis
, the
margin parameters for the x-axis (default is c(2, 0.5, 0)
).dotplot
function.
lmList
, dotplot
fm1 <- lmList(distance ~ age | Subject, Orthodont)
plot(ranef(fm1))
fm1RE <- ranef(fm1, aug = TRUE)
plot(fm1RE, form = ~ Sex)
## Not run: plot(fm1RE, form = age ~ Sex)
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