On Tue, 18 Sep 2012, Paul Gilbert wrote:
( A similar problem is also reported by Sebastian P. Luque with
library(maptools)
library(trip)
in the vignette as below ).
Thanks for bringing this up. This is caused by maptools avoiding: Depends:
spatstat, which might create circularities. maptools and spatstat (which
defines the classes that maptools and trip augment by adding coercion to
and from their own or sp classes) mutually Suggest: each other. trip
Depends: spatstat, but out of the box has no NAMESPACE - I haven't
investigated whether adding one helps.
Adding maptools to trip::Depends removes the warnings; check passes as
before, so no side-effects I can see. The auto-generated NAMESPACE is
then:
# Default NAMESPACE created by R
# Remove the previous line if you edit this file
# Export all names
exportPattern(".")
# Import all packages listed as Imports or Depends
import(
methods,
sp,
spatstat,
maptools
)
Since trip was last updated in May 2011, it is missing both a NAMESPACE
file, and suggestion of the correct adehabitat?? package(s) - adehabitat
is deprecated. I don't think that this is an S4 problem, I think it is
about keeping packages in sync with the R engine, especially with regard
to NAMESPACE, etc., and with packages named in DESCRIPTION. This may carry
over to the main case here, but I haven't checked.
Roger
I am writing a vignette which loads RMySQL and RPostgreSQL. This produces the
warning:
Loading required package: DBI
Warning in .simpleDuplicateClass(def, prev) :
A specification for class “dbObjectId” in package ‘RPostgreSQL’ seems
equivalent to one from package ‘RMySQL’ and is not turning on duplicate class
definitions for this class
This can be reproduced by running
R CMD Sweave --pdf Atest.Stex
where the file Atest.Stex has the lines
\documentclass{article}
\usepackage{Sweave}
\begin{document}
\begin{Scode}
library("RMySQL")
library("RPostgreSQL")
\end{Scode}
\end{document}
These warnings only happen in a vignette. They are not produced if the lines
are entered in an R session.
(Using R version 2.15.1 (2012-06-22) -- "Roasted Marshmallows" on Ubuntu)
Paul
--
Roger Bivand
Department of Economics, NHH Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: roger.biv...@nhh.no
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
