Hi Allan,
When you create an R package you can specify in the DESCRIPTION file
that your package depends on a certain R version and versions of
packages. For example:
Package: automap
Version: 1.0-7
Date: 2010/05/04
Title: Automatic interpolation package
Author: Paul Hiemstra <p.hiems...@geo.uu.nl>
Maintainer: Paul Hiemstra <p.hiems...@geo.uu.nl>
Description: This package performs an automatic interpolation by
automatically estimating the variogram and then calling gstat.
Depends: R (>= 2.7.0), methods, sp (>= 0.9-4), gstat (>= 0.9-58)
Imports: lattice
License: GPL
So distributing code to other people is preferably done using R
packages, which gives you this option.
regards,
Paul
On 07/16/2010 09:06 AM, Allan Engelhardt wrote:
What is the recommended way of requiring a certain version when
loading a package (or, indeed, from R itself)?
Perl has the
require module version
use module version
require version
use version
constructs which is kind of what I am looking for (especially 'use'
which is evaluated at compile time), but R seems to have lost the
version= argument to require().
The best I have been able to come up with are constructs of the form
if ( utils::compareVersion(utils::packageDescription("data.table",
fields="Version"), "1.5") < 0 ) stop("Need data.table version 1.5 or
later")
if ( utils::compareVersion(as.character(getRversion()), "2.11") >= 0 )
stop("Does not work yet with latest R.")
But this is tedious and error prone. I have created my own require()
function to automate this (it takes a vector of versions and a vector
of comparisons and only load the package if they are all met), but it
is non-standard and just that much harder for my colleagues to
maintain. Somebody must already have done this?
Allan
PS: Shouldn't utils::compareVersion("2.11.0", "2.11") return zero
instead of one?
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--
Drs. Paul Hiemstra
Department of Physical Geography
Faculty of Geosciences
University of Utrecht
Heidelberglaan 2
P.O. Box 80.115
3508 TC Utrecht
Phone: +3130 253 5773
http://intamap.geo.uu.nl/~paul
http://nl.linkedin.com/pub/paul-hiemstra/20/30b/770
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
