On Fri, Dec 11, 2009 at 10:24 AM, Peng Yu <pengyu.ut@gmail.com> wrote:

>
> How do you figure out all the possibilities?


Well, the "Value" section of the third party function's help page should
outline the return types it produces.  If it doesn't cover all cases, write
a letter to the package maintainer.  If you are using third party functions
that are not packaged with help pages, then this sort of uncertainty is part
of using unpublished code.

-Charlie

	[[alternative HTML version deleted]]


