R-alpha: Matrix: I surrender
To make what I was saying a little clearer, the fact that eg y<-x[vec,] y[1,] returns an error if vec is of length 1 (or has one T, &c) is compatible with S, but not with what most people expect when writing programs. Statements like y<-x[vec,] nearly always need drop=F as otherwise any future references to y must have special cases to handle vectors. The problem is that we should have drop=F when indexing by vectors that happen to be of length 1 and drop=T when indexing by scalars. I suppose it's reasonable to say that programmers can take care of themselves and we should choose the best default for interactive use, which is certainly drop=T. Perhaps we just need a mental health warning in the documentation and/or the faq to remind programmers that array dimensions can vanish whenever you subset. Also
Kurt wrote:
* Thomas, if you have ports of the above software, could you PLEASE package them? (Btw, I have a finished `port' of the V&R `classif' library, and of the `clus' library which comes with the paper on JSS.)
I have ported the addreg library, with additions (and sent it back to Harald Fekjaer, who should be releasing it Real Soon Now). The linear discrimination code I referred to is long obsolete and has been fixed (I saw it in 1992, I think). I'm intermittently working on the bayesian model averaging code, which was the major reason for creating the "leaps" subset selection library. Thomas Lumley -----------------------------------------------------+------ Biostatistics : "Never attribute to malice what : Uni of Washington : can be adequately explained by : Box 357232 : incompetence" - Hanlon's Razor : Seattle WA 98195-7232 : : ------------------------------------------------------------ =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-