[R] packagename:::functionname vs. importFrom

luke-tierney at uiowa.edu luke-tierney at uiowa.edu
Tue Jan 4 04:58:23 CET 2011

On Mon, 3 Jan 2011, Frank Harrell wrote:

> Correct.  I'm doing this because of non-exported functions in other packages,
> so I need :::
> I'd still appreciate any insight about whether importFrom in NAMESPACE
> defers package loading so that if the package is not actually used (and is
> not installed) there will be no problem.

It does not -- the namespace from which you import is loaded when your
package is. (Also you can't import unexported variables.)



> Thanks
> Frank
> -----
> Frank Harrell
> Department of Biostatistics, Vanderbilt University

Luke Tierney
Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
Department of Statistics and        Fax:               319-335-3017
    Actuarial Science
241 Schaeffer Hall                  email:      luke at stat.uiowa.edu
Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu

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