On 13-10-20 4:54 PM, Jonathan Greenberg wrote:
Duncan:
Thanks -- learning something new today -- quick follow-up, will using
the import statements in the NAMESPACE, when a user goes to
install.packages(), auto-install the "dependent" packages the same way
Depends forces?
You need to list the other packages in Imports instead of Depends; then
the answer is yes.
Duncan Murdoch
--j
On Sun, Oct 20, 2013 at 3:49 PM, Duncan Murdoch
<murdoch.dun...@gmail.com <mailto:murdoch.dun...@gmail.com>> wrote:
On 13-10-20 4:43 PM, Jonathan Greenberg wrote:
I'm working on an update for my CRAN package "spatial.tools" and
I noticed
a new warning when running R CMD CHECK --as-cran:
* checking CRAN incoming feasibility ... NOTE
Maintainer: 'Jonathan Asher Greenberg
<spatial-to...@estarcion.net <mailto:spatial-to...@estarcion.net>>'
Depends: includes the non-default packages:
'sp' 'raster' 'rgdal' 'mmap' 'abind' 'parallel' 'foreach'
'doParallel' 'rgeos'
Adding so many packages to the search path is excessive
and importing selectively is preferable.
Is this a warning that would need to be fixed pre-CRAN (not
really sure
how, since I need functions from all of those packages)? Is
there a way to
import only a single function from a package, if that function is a
dependency?
You really want to use imports. Those are defined in the NAMESPACE
file; you can import everything from a package if you want, but the
best style is in fact to just import exactly what you need. This is
more robust than using Depends, and it doesn't add so much to the
user's search path, so it's less likely to break something else
(e.g. by putting a package on the path that masks some function the
user already had there.)
Duncan Murdoch
--
Jonathan A. Greenberg, PhD
Assistant Professor
Global Environmental Analysis and Remote Sensing (GEARS) Laboratory
Department of Geography and Geographic Information Science
University of Illinois at Urbana-Champaign
259 Computing Applications Building, MC-150
605 East Springfield Avenue
Champaign, IL 61820-6371
Phone: 217-300-1924
http://www.geog.illinois.edu/~jgrn/ <http://www.geog.illinois.edu/%7Ejgrn/>
AIM: jgrn307, MSN: jgrn...@hotmail.com <mailto:jgrn...@hotmail.com>,
Gchat: jgrn307, Skype: jgrn3007
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