a fitted model, inheriting from
lm, including those with multiple response.
OPTIONAL ARGUMENTS:
complete
partial
flags indicating whether information for complete and partial aliasing
should be included in the result. Defaults are
TRUE
pattern
should the resulting alias matrices be simplified by calling the
pattern()
function. Default is
TRUE.
VALUE:
a list potentially containing components for complete aliasing
and for partial aliasing;
each is included only if both requested and found to exist in the
model.
The component for complete aliasing is a matrix with
columns corresponding to effects that are linearly dependent on the rows
(i.e., effects that are completely aliased with the estimable effects).
Partial aliasing is essentially the correlation of the estimable effects,
with the diagonal elements set to zero.
DETAILS:
This function is a method for the generic function
for class lm.
It can be invoked by calling
for an object x of the appropriate class, or directly by calling
regardless of the class of the object.
The method for
mlm objects uses that for
lm objects, after
adjusting the object suitably.