asrtests.object {asremlPlus} | R Documentation |
Description of an asrtests object
Description
An object of S3-class asrtests
that contains information derived from the fits of
a mixed model using asreml
.
as.asrtests
is function that makes an object of this class.
is.list
is the membership function for this class; it tests
that an object is of class list
.
validAsrtests
can be used to test the validity of an
asrtests.object
.
Value
A list
that contains three components:
-
asreml.obj
: an object of classasreml
that contains the fit of a model; -
wald.tab
: Adata.frame
containing a pseudo-anova table for the fixed terms produced bywald.asreml
. It hasrownames
that correspond to the fixed terms that were fitted and four columns. If denominator degrees of freedom were calculated then the columns areDF
,denDF
,F.inc
,Pr
; otherwise the columns areDf
,Sum of Sq
,Wald statistic
, andPr(Chisq)
. -
test.summary
: Adata.frame
with columnsterms
,DF
,denDF
,p
,AIC
,BIC
andaction
, each row of which summarizes the results of proposed changes to the fitted model.Possible codes for
action
are:Dropped
,Retained
,Swapped
,Unswapped
,Unchanged
,Significant
,Nonsignificant
,Absent
,Added
,Removed
andBoundary
. If the either of the models did not converge,unconverged
will be added to the code.Unchanged
is used whenallow.unconverged
isFALSE
. Note that the logicalasreml.obj$converge
also reflects whether there is convergence.A row is added to the
test.summary
for each term that is dropped, added or tested or a note that several terms have been added or removed. When values for the AIC and BIC are included in the row, then the DF are the number of fixed parameters in the model and denDF are the numbers of variance parameters. WhenchangeModelOnIC
adds a row then the values of the degrees of freedom and information criteria are differences between those for the model that is supplied and the model changed bychangeModelOnIC
.
Author(s)
Chris Brien
See Also
as.asrtests
, as.asrtests
, validAsrtests