Usage
## S3 method for class 'eff':
print(x, type=c("response", "link"), ...)
## S3 method for class 'effpoly':
print(x, type=c("probability", "logits"), ...)
## S3 method for class 'efflatent':
print(x, ...)
## S3 method for class 'efflist':
print(x, ...)
## S3 method for class 'summary.eff':
print(x, ...)
## S3 method for class 'eff':
summary(object, type=c("response", "link"), ...)
## S3 method for class 'effpoly':
summary(object, type=c("probability", "logits"), ...)
## S3 method for class 'efflatent':
summary(object, ...)
## S3 method for class 'efflist':
summary(object, ...)
## S3 method for class 'eff':
plot(x, x.var=which.max(levels),
z.var=which.min(levels), multiline=is.null(x$se), rug=TRUE, xlab,
ylab, main=paste(effect, "effect plot"),
colors=palette(), symbols=1:10, lines=1:10, cex=1.5, ylim,
factor.names=TRUE, type=c("response", "link"), ticks=list(at=NULL, n=5),
alternating=TRUE, layout, rescale.axis=TRUE, key.args=NULL,
row=1, col=1, nrow=1, ncol=1, more=FALSE, ...)
## S3 method for class 'effpoly':
plot(x, type=c("probability", "logit"),
x.var=which.max(levels), rug=TRUE, xlab,
ylab=paste(x$response, " (", type, ")", sep=""),
main=paste(effect, "effect plot"),
colors=palette(), symbols=1:10, lines=1:10, cex=1.5,
factor.names=TRUE, style=c("lines", "stacked"),
confint=(style == "lines" && !is.null(x$confidence.level)),
ylim, alternating=TRUE, layout, key.args=NULL,
row=1, col=1, nrow=1, ncol=1, more=FALSE, ...)
## S3 method for class 'efflist':
plot(x, selection, ask=TRUE, graphics=TRUE, ...)Arguments
x
an object of class "eff", "effpoly", "efflist",
or "summary.eff", as appropriate.
object
an object of class "eff", "effpoly", or "efflist",
as appropriate.
type
for linear and generalized linear models,
if "response" (the default), effects are printed
or the vertical axis is labelled on the scale of the response
variable; if "link", effects are printed
or the vertic
x.var
the index (number) or quoted name of the covariate or factor to place on the
horizontal axis of each panel of the effect plot. The default is the
predictor with the largest number of levels or values.
z.var
for linear or generalized linear models,
the index (number) or quoted name of the covariate or factor for which
individual lines are to be drawn in each panel of the effect plot. The default is the
predictor with the smallest number of leve
multiline
for linear or generalized linear models,
if TRUE, each panel of the display represents combinations
of values of two predictors, with one predictor (corresponding to x.var)
on the horzontal axis, and the other (corr
confint
plot point-wise confidence bands around fitted effects (for
multinomial and proportional-odds logit models); defaults to TRUE,
in which case separate panels are used for different response levels.
rug
if TRUE, the default, a rug plot is shown giving the marginal
distribution of the predictor on the horizontal axis, if this predictor is
a covariate.
xlab
the label for the horizontal axis of the effect plot; if missing, the
function will use the name of the predictor on the horizontal axis.
ylab
the label for the vertical axis of the effect plot; the default is
constructed from the name of the
response variable for the model from which the effect was computed.
main
the title for the plot, printed at the top; the default title is constructed from the
name of the effect.
colors
colors[1] is used to plot effects, colors[2] to plot
confidence bands. In a mulitline plot, the successive colors correspond
to the levels of the z.var covariate or factor. In a stacked plot o
symbols, lines
corresponding to the levels of the z.var covariate
or factor on a multiline plot, or to the successive levels of the response factor
in a line plot for a polytomous logit model.
These arguments are used only if multiline
cex
character expansion for plotted symbols; default is 1.5.
ylim
2-element vector containing the lower and upper limits of the vertical axes;
if NULL, the default, then the vertical axes are scaled from the data.
factor.names
a logical value, default TRUE, that controls the inclusion of
factor names in conditioning-variable labels.
style
(for multinomial or proportional-odds logit models) "lines" (the default
for a line plot, or "stacked" for a stacked-bar or stacked-area plot. In the latter
case only fitted probabilities may be plotted and confidence e
ticks
a two-item list controlling the placement of tick marks on the vertical axis,
with elements at and n. If at=NULL (the default), the program
attempts to find `nice' locations for the ticks, and the value of
alternating
if TRUE (the default), the tick labels alternate by panels in
multi-panel displays from left to right and top to bottom; if FALSE, tick labels
appear at the bottom and on the left.
layout
the layout argument to the lattice function xyplot
(or, in some cases densityplot), which
is used to draw th rescale.axis
if TRUE (the default), the tick marks on the vertical axis
are labelled on the response scale (e.g., the probability scale for effects computed on
the logit scale for a binomial GLM).
key.args
additional arguments to be passed to the key trellis argument to
xyplot or densityplot,
e.g., to position the key ( row, col, nrow, ncol, more
These arguments are used to graph an effect as part of an
array of plots; row, col, nrow, and ncol are used to compose
the split argument and more the more
selection
the optional index (number) or quoted name of the effect in an effect
list to be plotted; if not supplied, a menu of high-order terms is presented or all effects
are plotted.
ask
if selection is not supplied and ask is TRUE (the default),
a menu of high-order terms is presented; if ask is FALSE, effects for all
high-order terms are plotted in an array.
graphics
if TRUE (the default), then the menu of terms to plot is presented
in a dialog box rather than as a text menu.
...
arguments to be passed down.