On Tue, 4 Jan 2011, Frank Harrell wrote:
Thanks Luke. By "the namespace from which you import is loaded when your package is" I take it that you are saying that all such referenced packages are loaded up front, which is not what I hoped.
That is what happens. You can use conditional imports in the NAMESPACE but that isn't appropriate for all setting. Using :: is reasonable if you want to use a fuction only if its package is available. Using ::: is code is a really bad idea for reasons already explained inthis thread.
And it's too bad you can't import unexported objects, as that rather defeats the purpose of importFrom.
The purpose of importFrom is to avoid a full import. So in no sense does this "defeat the purpose of importFrom". Best, luke
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: l...@stat.uiowa.edu Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
