Usage
heplot(mod, ...)
## S3 method for class 'mlm':
heplot(mod, terms, hypotheses, term.labels = TRUE,
hyp.labels = TRUE, variables = 1:2, error.ellipse = !add,
factor.means = !add, grand.mean = !add, remove.intercept = TRUE,
type = c("II", "III", "2", "3"), manova, size = c("evidence", "effect.size"),
level = 0.68, alpha = 0.05, segments = 40, center.pch = "+", col = palette()[-1],
lty = 2:1, lwd = 1:2, xlab, ylab, main = "", xlim, ylim, offset.axes,
add = FALSE, verbose = FALSE, warn.rank = FALSE, ...)Arguments
mod
a model object of class "mlm".
terms
a logical value or character vector of terms in the model
for which to plot
hypothesis matrices; if missing or TRUE, defaults to all terms;
if FALSE, no terms are plotted.
hypotheses
optional list of linear hypotheses for which to plot hypothesis
matrices; hypotheses are specified as for the
linear.hypothesis function in the car package;
the list term.labels
logical value or character vector of names for the terms to be
plotted. If TRUE (the default) the names of the terms are used;
if FALSE, term labels are not plotted.
hyp.labels
logical value or character vector of names for the hypotheses to
be plotted. If TRUE (the default) the names of components of the list of
hypotheses are used; if FALSE, hypothesis labels are not plotted.
variables
indices or names of the two response variables to be plotted;
defaults to 1:2.
error.ellipse
if TRUE, plot the error ellipse; defaults to TRUE,
if the argument add is FALSE (see below).
factor.means
logical value or character vector of names of
factors for which the means
are to be plotted, or TRUE or FALSE; defaults to TRUE,
if the argument add is FALSE (see below).
grand.mean
if TRUE, plot the centroid for all of the data;
defaults to TRUE,
if the argument add is FALSE (see below).
remove.intercept
if TRUE (the default), do not plot the
ellipse for the intercept even if it is in the MANOVA table.
type
``type'' of sum-of-squares-and-products matrices to compute; one of
"II", "III", "2", or "3", where "II" is
the default (and "2" is a synomym).
manova
optional Anova.mlm object for the model; if absent a
MANOVA is computed. Specifying the argument can therefore save
computation in repeated calls.
size
how to scale the hypothesis ellipse relative to the error
ellipse; if "evidence", the default, the scaling is done so that
a ``significant'' hypothesis ellipse extends outside of the error
ellipse; if "effect.size"
level
equivalent coverage of ellipse for normally-distributed
errors, defaults to 0.68.
alpha
signficance level for Roy's greatest-root test statistic; if
size="evidence", then the
hypothesis ellipse is scaled so that it just touches the error ellipse at the
specified alpha level; a larger hypothesis elllipse therefore
segments
number of line segments composing each ellipse; defaults to
40.
center.pch
character to use in plotting the centroid of the data;
defaults to "+".
col
a colour or vector of colours to use in plotting ellipses; the first
colour is used for the error ellipse; the remaining colours --- recycled
as necessary --- are used for the hypothesis ellipses;
a single colour can be given, in which cas
lty
vector of line types to use for plotting the ellipses; the first is
used for the error ellipse, the rest --- possibly recycled --- for
the hypothesis ellipses; a single line type can be given. Defaults to
2:1.
lwd
vector of line widths to use for plotting the ellipses; the first is
used for the error ellipse, the rest --- possibly recycled --- for
the hypothesis ellipses; a single line width can be given. Defaults to
1:2.
xlab
x-axis label; defaults to name of the x variable.
ylab
y-axis label; defaults to name of the y variable.
main
main plot label; defaults to "".
xlim
x-axis limits; if absent, will be computed from the data.
ylim
y-axis limits; if absent, will be computed from the data.
offset.axes
proportion to extend the axes in each direction if computed
from the data; optional.
add
if TRUE, add to the current plot; the default is FALSE.
If TRUE, the error ellipse is not plotted.
verbose
if TRUE, print the MANOVA table and details of hypothesis
tests; the default is FALSE.
warn.rank
if TRUE, do not suppress warnings about the rank of the
hypothesis matrix when the ellipse collapses to a line; the default is
FALSE.
...
arguments to pass down to plot, text,
and points.