Package ‘MuMIn’

updateable 57
x
an object from which the call should be extracted.
formula, random, ...
arguments to be passed to gamm or gamm4
lme4
if TRUE, gamm4 is called, gamm otherwise.
Details
Most model fitting functions in R return an object that can be updated or re-fitted via update. This
is thanks to the call stored in the object, which can be used (possibly modified) later on. It is
also utilised by dredge to generate sub-models. Some functions (such as gamm or MCMCglmm) do
not provide their result with the call element. To work that around, updateable can be used on
that function to store the call. The resulting wrapper should be used in exactly the same way as the
original function.
Argument eval.args specifies names of function arguments that should be evaluated in the stored
call. This is useful when, for example, the model object does not have formula element. The
default formula method tries to retrieve formula from the stored call, which works unless the
formula has been given as a variable and value of that variable changed since the model was fitted
(the last ‘example’ demonstrates this).
Value
updateable returns a function with the same arguments as FUN, wrapping a call to FUN and adding
an element named call to its result if possible, otherwise an attribute "call" (if the returned value
is atomic or a formal S4 object).
Note
get_call is similar to getCall (defined in package stats), but it can also extract the call when it
is an attribute (and not an element of the object). Because the default getCall method cannot do
that, the default update method will not work with atomic or S4 objects resulting from updateable
wrappers.
uGamm sets also an appropriate class onto the result ("gamm4" and/or "gamm"), which is needed for
some generics defined in MuMIn to work (note that unlike the functions created by updateable it
has no formal arguments of the original function). As of version 1.9.2, MuMIn::gamm is no longer
available.
Author(s)
Kamil Bartoń
See Also
update, getCall, getElement, attributes
gamm, gamm4