On 28 Mar 2004 at 8:41, Prof Brian Ripley wrote: > On Sat, 27 Mar 2004, Xianggui QU wrote: > > > Does anybody have a workable dopt program in R to generate D-optimal > > designs. I downloaded dopt.zip from stat homepage of the university > > of oxford, whenever I load it into R and try to run, the following > > error comes: Error: couldn't find function "Dopt". > > Eh? There is no such file on our homepage! There is a dopt.zip for > S-PLUS <= 2000 at the URL www.stats.ox.ac.uk/pub/SWin, but none for R > on our server. > > I don't know how to `load dopt.zip into R': you can only load() R save > files. > > > Any information will be highly appreciated! > > Try reading ReadMe files in the directories you chance upon. You must > be careful not to blame other people for your carelessness. > > I guess you are using Windows (since you don't think it necessary to > tell us). There is an R port of that S code on CRAN at > > http://cran.r-project.org/src/contrib/Devel/ > > but note it is source code, and you will need to install it: see the > rw-FAQ if you are indeed using Windows. >
Adding to what Prof. Ripley said: There is a reaon Dopt is in the devel directory of CRAN. See the information included in that tar.gz: The code "bombs" R in some few cases. Still it can be usefull, if used with care. The errors are NOT made with the port to R, I have tried the dopt.zip Brian Ripley mentions for S-Plus <= 2000 with S- Plus 4.5, and the same cases which bombs R, bombs S-Plus. There is a new package AlgDesign, by Bob Wheeler, on CRAN, which is also precompiled for windows. I haven't tried it yet, but it can probably do everything Dopt can do, and more. When I get time to check it out, and verified this, I will ask for Dopt to be removed from the devel directory on CRAN. Kjetil Halvorsen > -- > Brian D. Ripley, [EMAIL PROTECTED] > Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ > University of Oxford, Tel: +44 1865 272861 (self) 1 South > Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, > UK Fax: +44 1865 272595 > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
