Re: [Rd] Suppressing a warning from library()

From: Prof Brian Ripley <>
Date: Wed, 24 Feb 2010 17:39:29 +0000 (GMT)

On Wed, 24 Feb 2010, Terry Therneau wrote:

> I get a warning about "1 warning message" using R CMD check on the
> survival library. It comes from the code snippet:
> if (library(cmprsk, logical.return=TRUE)) {
> # further test of competing risks from survfit
> .
> .
> }
> This is a very useful additional test when I'm checking any changes to
> the affected code, so I like having this in my test suite even though it
> doesn't run automatically.
> This argues for a change in library -- when the user sets logical.return
> =T they don't need a warning message too.

It was the considered opinion that in general they do. You can always use suppressWarnings() in your code if you don't, or you can pre-check that the package is available via lower-level functions such as .packages and .find.package.

> I submit this to the R core and their collective wisdom.
> I admit that mine is an unusual case, and for now I'll turn if off with
> options(warn=-1)
> Terry T.
> ______________________________________________
> mailing list

Brian D. Ripley,        
Professor of Applied Statistics,
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

______________________________________________ mailing list
Received on Wed 24 Feb 2010 - 17:42:12 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Thu 25 Feb 2010 - 01:10:48 GMT.

Mailing list information is available at Please read the posting guide before posting to the list.

list of date sections of archive