[Rd] Reading a specific file during "R CMD check"?

Prof Brian Ripley ripley at stats.ox.ac.uk
Sat Feb 5 09:04:42 CET 2011

On Fri, 4 Feb 2011, Hadley Wickham wrote:

> Hi Spencer,
> I think one of the early phases of R CMD check is R CMD install - it
> installs the package into a special location so that it doesn't
> override existing installed packages, but still allows function to
> work exactly as if they were in an installed package.

There first part may or may not be true (it is not for some of the 
ways 'check' is used on the check farm: consider the --install 
argument, which is not described in --help), but in every case it will 
be true that the copy of the package under check is installed in the 
library at .libPaths()[1], and that installed package is used by 
'check' unless the user's code does really odd things (like manipulate 

> Hadley
> On Fri, Feb 4, 2011 at 7:57 PM, Spencer Graves
> <spencer.graves at structuremonitoring.com> wrote:
>> Hello, All:
>>      How can I obtain the location of an example data file in a package
>> during "R CMD check"?
>>      I want to include sample raw data files in a package and have them read
>> by a function in the package.  It occurs to me to put such a file in
>> "\inst\rawdata" and have examples find the data using something like
>> "system.file('rawdata', package='MyPackage')". However, this will only work
>> if the desired data are already in a version of 'MyPackage' that is already
>> installed.  If I change the data, this will return the old data, not the
>> modified.  I've looked at packages RUnit and svUnit, but have not spent
>> enough time with either to know if they include a solution to this problem.

I doubt that the 'problem' is in 'R CMD check', but without a 
reproducible example, we have no evidence either way.  Certainly 
plenty of packages use system.file() in their examples, and 'check' 
works for them even if they are not previously installed.

>>      Thanks for your help.
>>      Spencer
>> --
>> Spencer Graves, PE, PhD
>> President and Chief Operating Officer
>> Structure Inspection and Monitoring, Inc.
>> 751 Emerson Ct.
>> San José, CA 95126
>> ph:  408-655-4567
>> ______________________________________________
>> R-devel at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
> -- 
> Assistant Professor / Dobelman Family Junior Chair
> Department of Statistics / Rice University
> http://had.co.nz/
> ______________________________________________
> R-devel at r-project.org mailing list
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Brian D. Ripley,                  ripley at 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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