[R-pkg-devel] test script output

[Kevin R. Coombes]

Hi,h

I have a package that has been in CRAN for years and is now failing 
checks because some of the output of a test script is differing on some 
machines in the fifth or sixth decimal place. I have managed to fix most 
of these issues (by using the "digits" argument in calls to "summary" to 
hide the differences). the only one that remains yields this R CMD check 
report:

   Comparing ‘testDiff.Rout’ to ‘testDiff.Rout.save’ ...52c52
< 2.600e-06 1.328e-01 4.666e-01 1.060e+00 1.369e+00 1.091e+01
---
>  0.000003  0.132800  0.466600  1.060000  1.369000 10.910000 

Here the digit-limited output is the same (to a human mathematician, though not to a string-matching computer), but one machine has decided to report the output in scientific notation. Both versions were produced by a command equivalent to
    print(summary(x, digits = 4))
What is the best cross-platform way to ensure that the output gets printed in the same format? Set "options(scipen=999)"? Pass some argument to "print" as well as to "summary"? (The other alternative I am considering is to just delete the script from the "tests" directory.)

Thanks,
    Kevin

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