On Fri, 5 May 2006, Ken Kelley wrote: > Thank you both very much for your quick and helpful responses. > > I added "Imports: MASS, gsl" to the DESCRIPTION file and that took care of > loading in the desired functions just fine. I went back and took another look > at the "Specifying imports and exports" section (section 1.6.1) of the > Writing R Extensions manual and I do not see anything about including an > "Imports:" line in the DESCRIPTION file when including an "importFrom" in the > NAMESPACE file. Perhaps including this information in a future update should > be considered.
Well, no, it described under the DESCRIPTION file: The optional @samp{Imports} field lists packages whose namespaces are imported from but which do not need to be attached. Note that caveat which complicates the issue and I think makes in inappropriate for that section. > I was building the package on a machine that had a pre-release version of R > 2.3.0 (from some time ago). After updating to the released version of 2.3, > the warning about a "depreciated NULL environment" did not occur and the > package built just fine. > > Thanks again and have a good day, > Ken > > > Prof Brian Ripley wrote: >> On Fri, 5 May 2006, Ken Kelley wrote: >> >>> Hello all. >>> >>> I'm building a package where I want to include a function from two >>> different packages. In particular, I want to include mvrnorm and >>> hyperg_2F1 from MASS and gsl, respectively (but the specific functions >>> do not matter). With what I've tried after reading the "Specifying >>> imports and exports" section from the "Writing R Extensions" manual, I >>> get an error: "Namespace dependencies not required." >> >> >> When do you get the error? >> >>> My NAMESPACE file consists of the following: >>> importFrom(MASS, mvrnorm) >>> importFrom(gsl, hyperg_2F1) >>> exportPattern("^[^\\.]") >> >> >> Does your DESCRIPTION file contain >> >> Imports: MASS gsl >> >> ? >> >>> A completely separate issue is that when running check, I get a warning >>> at the "checking S3 generic/method consistency" line that states: >>> "Warning: use of NULL environment is depreciated." I've looked at the >>> "Generic functions and methods" in the Writing R Extensions manual and >>> I'm still not sure what the "use of NULL environment is depreciated." I >>> suppose this is not a big deal, but it seems best not to have any >>> warnings. >> >> >> It is a big deal: your code will fail in 2.4.0 and not be allowed on CRAN >> now. The message is probably not to do with that topic but to do with >> loading your package. So can you install and load the package without any >> messages? >> >>> I'm sure I'm just missing something simple on both of these issues. Any >>> insight would be appreciated. I'm building the package with Win. XP. >> >> > > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel