asrtests that stores a fitted asreml object,
a pseudo-anova table for the fixed and a history of
changes and hypthesis testing used in obtaining the model.asrtests consists of a list containing:
asreml.obj: an asreml object containing the fit
of the model;
wald.tab: a data.frame containing a pseudo-anova
table for the fixed terms produced by wald.asreml,
which will be called if wald.tab is NULL;
test.summary: a data.frame with columns term,
DF, denDF, p and action. A row is added to
it for each term
that is dropped, added or tested or a note that several terms have been
added or removed. A row contains the name of the term, the
DF, the p-value and the action taken. Possible codes are:
Dropped, Retained, Swapped, Unswapped,
Significant, Nonsignificant, Absent, Added,
Removed and Boundary. If the changed model did not
converge, Unconverged will be added to the code.
Note that the logical asreml.obj$converge also
reflects whether there is convergence. A call to asrtests with test.summary = NULL re-initializes the
test.summary data.frame.
asrtests(asreml.obj, wald.tab = NULL, test.summary = NULL, denDF = "default", ...)asreml object for a fitted model.data.frame containing a pseudo-anova table for
the fixed terms produced by wald.asreml; it should have 4 columns.
Sometimes wald.asreml returns a data.frame and at other
times a list. For example, it may return a list when
denDF is used. In this case, the Wald component of the
list is to be extracted and stored.data.frame with columns term,
DF, denDF, p and action containing the
results of previous hypothesis tests.wald.asreml is called. Can be none
to suppress the computations, numeric for numerical methods,
algebraic for algebraic methods or default, the default,
to autommatically choose numeric or algebraic computations depending
on problem size. The denominator degrees of freedom are calculated
according to Kenward and Roger (1997) for fixed terms in the dense
part of the model.wald.asreml.asrtests.asremlPlus-package, testranfix.asrtests,
choose.model.asrtests,
rmboundary.asrtests,
sig.devn.reparam.asrtests