On Dec 11, 2009, at 4:45 PM, Peng Yu wrote: > On Fri, Dec 11, 2009 at 2:37 PM, Charlie Sharpsteen > <ch...@sharpsteen.net> wrote: >> On Fri, Dec 11, 2009 at 10:24 AM, Peng Yu <pengyu...@gmail.com> wrote: >>> >>> How do you figure out all the possibilities? >> >> Well, the "Value" section of the third party function's help page should >> outline the return types it produces. If it doesn't cover all cases, write >> a letter to the package maintainer. If you are using third party functions >> that are not packaged with help pages, then this sort of uncertainty is part >> of using unpublished code. > > A document may not document all the corner cases. Even if it is so, > you can never be sure unless all the possibilities are examined .
No, you can be sure. Just look at the code of the function that is ill behaved. As Don asked: are you actually experiencing this problem with a library on CRAN? -- Steve Lianoglou Graduate Student: Computational Systems Biology | Memorial Sloan-Kettering Cancer Center | Weill Medical College of Cornell University Contact Info: http://cbio.mskcc.org/~lianos/contact ______________________________________________ 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.
