On Fri, 6 Apr 2012, Brad McNeney wrote:
OK, thanks for the tip on good coding practice. I'm still getting the NOTE
though when I make the suggested change.
Yes, you will: data() is a function with side effects, which is
contrary to the functional programming model being checked. So there
is no way to avoid all notes and use data().
If you want to make your code more understandable, consider using
LazyData (see 'Writing R Extensions'). My view is that data() is a
kludge from long ago when R had much less powerful memory management,
except perhaps for very large datasets (at least 100MBs) when you may
want to control when they are loaded into memory.
In case it matters, I'm check'ing with
R version 2.15.0 (2012-03-30)
Platform: i386-pc-mingw32/i386 (32-bit)
Brad
----- Original Message -----
From: "Prof Brian Ripley" <rip...@stats.ox.ac.uk>
To: "Brad McNeney" <mcne...@sfu.ca>
Cc: r-devel@r-project.org
Sent: Friday, 6 April, 2012 12:18:14 PM
Subject: Re: [Rd] R CMD check returns NOTE about package data set as global
variable
On 06/04/2012 19:46, Brad McNeney wrote:
I'm developing a package that comes with a data set called
RutgersMapB36. One of the package's functions requires this data
frame. A toy example is:
test<-function() {
data(RutgersMapB36)
return(RutgersMapB36[,1])
}
R CMD check returns a NOTE:
test: no visible binding for global variable 'RutgersMapB36'
Is there any way to avoid this NOTE?
Use data("RutgersMapB36"), which many think is good practice in code.
Thanks,
Brad
---
Brad McNeney
Statistics and Actuarial Science
Simon Fraser University
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Brian D. Ripley, rip...@stats.ox.ac.uk
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
--
Brian D. Ripley, rip...@stats.ox.ac.uk
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
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