Re: [Rd] Cell or PS3 Port

2007-11-02 Thread Ed Knutson
The main core of the Cell (the PPE) uses IBM's version of hyperthreading to expose two logical, main CPU's to the OS, so code that is "simply" multi-threaded should still see an advantage. In addition, IBM provides an SDK which includes workflow management as well as libraries to support commo

Re: [Rd] Cell or PS3 Port

2007-11-02 Thread Luke Tierney
I have been experimenting with ways of parallelizing many of the functions in the math library. There are two experimental packages available in http://www.stat.uiowa.edu/~luke/R/experimental: pnmath, based on OpenMP, and pnmath0, based on basic pthreads. I'm not sure to what degree the approach

Re: [Rd] vignettes and papers

2007-11-02 Thread Achim Zeileis
Robin: > Lots of my packages have been the subject of > journal articles either in JSS or Rnews or (in one > case) elsewhere. > > I would like to add these articles > to my packages as vignettes. > > Reproducing the papers exactly requires a number > of files [such as style files or PDFs] to be in

[Rd] applying duplicated, unique and match to lists?

2007-11-02 Thread Jens Oehlschlägel
Dear R developers, While improving duplicated.array() and friends and developing equivalents for the new ff package for large datasets I came across two questions: 1) is it safe to use duplicated.default(), unique.default() and match() on arbitrary lists? If so, we can speed up duplicated.array

[Rd] vignettes and papers

2007-11-02 Thread Robin Hankin
Hello everyone Lots of my packages have been the subject of journal articles either in JSS or Rnews or (in one case) elsewhere. I would like to add these articles to my packages as vignettes. Reproducing the papers exactly requires a number of files [such as style files or PDFs] to be included i