[R] determining if a function exists in a particular package

[Erin Hodgess]

Hello R People:

Is there a way to determine if a function exists in a particular
package, please?

I looked at exists and objects, but they seem to refer to an
environment rather than a package.

I was thinking of something like:

ifelse(exists(functiona) in MASS, print(1:10), print(5))

Thanks,
Erin


-- 
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: erinm.hodgess at gmail.com