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.
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. > > -- Ken Kelley, Ph.D. Indiana University Inquiry Methodology Program 201 North Rose Avenue, Room 4040 Bloomington, Indiana 47405 (P/F) 812-856-8330 / 812-856-8333 http://www.indiana.edu/~kenkel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel