On 26/06/2018 2:24 PM, Therneau, Terry M., Ph.D. via R-devel 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.
There are a lot of default methods; most of them are probably irrelevant
to you. But if you want to see them, here's one way:
basepkgs <- rownames(subset(as.data.frame(installed.packages()),
Priority == "base"))
for (pkg in basepkgs) {
print(ls(getNamespace(pkg), pattern = ".default$"))
}
This only shows the ones in base packages. If you expand to 'Priority
== "recommended"' or something even less restrictive, you'll get more.
Duncan Murdoch
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