Hadley, I started to throw some functions that I needed to be extended to arrays together as package arrayhelpers. If you consider that a good home for the new functions, they would be more than welcome.
Currently I have the package at r-forge, but I wouldn't mind github, either (so far I just use git-svn). Unit tests use svUnit, not testthat, though. Happy new year to everyone, Claudia Am 02.01.2012 18:38, schrieb Richard M. Heiberger: > Hadley, > > Your request is reminding me of the analysis of aray functions in Philip S > Abrams dissertation > http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-r-114.pdf > AN APL MACHINE > > The section that starts on page 17 with this paragraph is the one that > immediately applies > > C. The Standard Form for Select Expressions > > In this section the selection operators considered are take, drop, reversal, > transpose, and subscripting by scalars or _J-vectors. Because of the > similarity > among the selection operators, we might expect that an expression > consisting only > of selection operators applied to a single array could be expressed > equivalently in > terms of some simpler set of operators. This expectation is fulfilled in the > standard form for select expressions, to be discussed below. > > I look forward to seeing where you take this in R. > > Rich > > On Mon, Jan 2, 2012 at 8:38 AM, Hadley Wickham <had...@rice.edu> wrote: > >>> But if not, it seems to me that it should be added as an array method >>> to ?rev with an argument specifying which indices to rev() over. >> >> Yes, agreed. Sometimes arrays seem like something bolted onto R that >> is missing a lot of functionality. >> >> Hadley >> >> -- >> Assistant Professor / Dobelman Family Junior Chair >> Department of Statistics / Rice University >> http://had.co.nz/ >> >> ______________________________________________ >> 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<http://www.r-project.org/posting-guide.html> >> and provide commented, minimal, self-contained, reproducible code. >> > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. -- Claudia Beleites Spectroscopy/Imaging Institute of Photonic Technology Albert-Einstein-Str. 9 07745 Jena Germany email: claudia.belei...@ipht-jena.de phone: +49 3641 206-133 fax: +49 2641 206-399 ______________________________________________ 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.