Fitted linear model object, or formula defining the untransformed
model that is
y ~ x1 + x2 + .... The function is generic.
OPTIONAL ARGUMENTS:
...
If
object is a formula, this argument may specify a data frame
as for
lm.
alpha
Set of values for the transformation parameter, alpha.
plotit
Should plotting be done? (Default is
T
if a non-null device is currently active, else
F.)
interp
Should the marginal log-likelihood be interpolated with a spline
approximation? (Default is
T if plotting
is to be done and the number of real points is less than 100.)
xlab
as for
plot.
ylab
as for
plot.
VALUE:
List with components
x (for alpha) and
y (for the marginal log-likelihood
values).
SIDE EFFECTS:
A plot of the marginal log-likelihood is produced, if requested,
together with an approximate mle and 95% confidence interval.