While it's easy to conceive of a utility that found all generics for
which there is no non-default method for a given class vector, it's
not clear it would be useful, because it depends on the nature of the
object. Surv objects are vector-like, so they need to implement the
"vector API", which is not formally defined. You could look at the
S4Vectors package or the date/time classes for reference. But Surv
gets a lot less for free since length() returns twice their logical
length, an unfortunate inconsistency.
Michael
On Tue, Jun 26, 2018 at 11:24 AM, Therneau, Terry M., Ph.D. via
R-devel <r-devel@r-project.org> wrote:
> I recently got a request to add head() and tail() methods for Surv objects,
> which is quite
> reasonable, but not unlike other requests for logLik, vcov, extractAIC, ...
> What they
> all have in common is that are methods added since creation of the survival
> package, and
> that I didn't know they existed.
>
> To try and get ahead of the curve, is there a way to list names of all of the
> default
> methods? There are functions to get all the instances of a method by name,
> e.g.
> methods("extractAIC") or find all the methods already implemented for a
> class, but I don't
> see something give me a list of the ones that I haven't created yet.
>
> Terry T.
>
>
> [[alternative HTML version deleted]]
>
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