[R-pkg-devel] Running tests on 32-bit and 64-bit

Kasper Daniel Hansen kasperdanielhansen at gmail.com
Mon Aug 17 14:21:38 CEST 2015

Perhaps related: in the Bioconductor minfi package I do some checking on
somewhat large matrices (450,000 times n).  To save space, I compute a hash
of the correct result using the digest package.  As you, I ran into obvious
issues with precision across platforms.  To solve this, I take the matrix
and run it through sprintf() with (my choice) 6 digits and then I hash the
resulting character matrix.  It works pretty nice for my purpose.

You find minfi on github.  Code is in
  inst/unitTests/test_preprocess.R  (testing using Runit)
  inst/testData/testData/testData_preprocessQuantile.R (creating the
reference "correct" matrix - this is only intended to be re-run when the
algorithm change)
  R/utils.R for the two convenience functions .digestMatrix and


On Mon, Aug 17, 2015 at 5:03 AM, Thierry Onkelinx <thierry.onkelinx at inbo.be>

> Dear all,
> Is there an easy way to run the tests of a package on both a 32-bit and
> 64-bit version? Ideally it should work when using R CMD check --as-cran on
> all OS's. Although I expect that multi architecture versions are only
> available on windows. So a Windows only solution will be fine as well.
> The origin of the problem is that I calculate some SHA1 hashed on objects
> containing floating point numbers. The floating points have different
> precision on 32-bit and 64-bit, and thus different hashes. I'm trying to
> work around that problem. And thus need an easy way to run tests on both
> 32-bit and 64-bit.
> Best regards,
> ir. Thierry Onkelinx
> Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
> Forest
> team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
> Kliniekstraat 25
> 1070 Anderlecht
> Belgium
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