silent option for library function
Wed, 30 Oct 2002 16:09:31 +0000 (GMT)
On Wed, 30 Oct 2002, Vincent J. Carey, Jr. wrote:
> would it be possible to add an option to library that
> prevents messages except when there are errors? as
> we build Sweave documents illustrating package functionalities
> it is sometimes desirable to attach a package "behind
> the scenes". packages that have messages emitted
> in .First.lib (often describing version or developer)
> frustrate this particular desire. verbose=FALSE
> does not accomplish this.
> note that i have no objection to messages produced by
> default use of library. i just want the ability to
> suppress them when there are no errors. currently
> it is possible to do
> library([e.g. affy])
> but that may suppress too much -- an error message may be
Don't think so. From help(sink):
Normal R output is diverted by the default `type = "output"'. Only
prompts and warning/error messages continue to appear on the
terminal. These too can diverted by `type = "message"' (see
and for example
Error in firstlib(which.lib.loc, package) :
Error in library(foo) : .First.lib failed
So how are you losing error messages?
BTW, there is no way for library() to control what a user does in his
.First.lib: he could put up a dialog box agreeing the usage terms.
Actually, that seems a rather good idea ....
Brian D. Ripley, email@example.com
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
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