similar to: can I have a matrix of factors, please?

Dear R-devel, Apologies for bothering y'all with this seemingly perennial question. A user reported problem with my most recent version of randomForest (4.4-1), and I was able to reproduce it with his data with R-2.0.0 patched (2004-10-24) on WinXP Pro. The problem is that it crashes R on Windows. However, it does not happen on Linux (tried SUSE ES8 on our Opterons and Quantian on my

Dear R-devel, Can anyone give me some hints on how to go about debugging a strange segfault in my randomForest package? Here's the scoop: A user reported segfault when running predict() in the randomForest package. I asked for the data and code. The combination runs fine under WinXPPro, but does give segfault on one of our Linux boxes running R (1.7.0 through R-devel_2004-01-08) on

Dear R-devel, Has anyone played with this? http://www.amd.com/us-en/Processors/DevelopWithAMD/0,,30_2252_2282,00.html <http://www.amd.com/us-en/Processors/DevelopWithAMD/0,,30_2252_2282,00.html> . I'll probably give it a shot... Best, Andy Andy Liaw, PhD Biometrics Research PO Box 2000, RY33-300 Merck Research Labs Rahway, NJ 07065 mailto:andy_liaw@merck.com

Dear R-help, Has anyone notice the problem that, on Windows (NT and XP), when printing a graph using the "File -> Print..." menu in the graphics window to print the graph, that line width seemed to be ignored in the printed output? For example, if I make a plot with plot(1:10, type="l", lwd=5), it looks right on screen, but when printed out using the menu, it looks like

Dear R-help, Can some one tell me what could be the problem? I downloaded the R-1.7.1 source and try to compile it on WinXP. "make", "make bitmapdll", "make tcl", "make recommended" all ran w/o problem. However, when I ran "make docs", it failed at creating refman.pdf, with no apparent error that I could see. I have attached the log file

Dear R-devel, I recall that there used to be a mechanism to get around the requirement that all objects in a package have associated documentation; i.e., a way to specify a list of objects (mostly functions) that are not considered as part of the package API. Is this still available? I cannot find any mention in R-exts. I realize that the way to go is to have a name space, and eventually

[I believe few users manipulate formulae and model frames like this, so I'm posting here instead of R-help.] I just found out that model.frame() includes all terms, including those preceded by "-" in the formula, in its output (as mentioned on its help page). Is there a recommended way of excluding "negative" terms? My guess is that I can use info in the terms attribute

Dear R-help, I've been compiling R from source on our Linux boxes for quite a while. One thing that bugs me is that I always get an error when make check-all where it choked up running tests/internet.R. That wasn't a big deal, as I can run install.packages()/update.packages() fine, and that's all I use the 'net connection for. The problem is that it takes a _long_ time to fail

Dear R-help: Has anyone tried using R on the the AMD Opteron in either 64- or 32-bit mode? If so, any good/bad experiences, comments, etc? We are considering getting this hardware, and would like to know if R can run smoothly on such a beast. Any comment much appreciated. Best, Andy Andy Liaw, PhD Biometrics Research PO Box 2000, RY33-300 Merck Research Labs Rahway, NJ

Dear R-devel, A while ago Prof. Ripley had mentioned that g77 on AMD64 isn't the greatest, and the Salford Fortran is likely to be better. My question is, has anyone tried compiling R with Salford compilers (or other commercial compilers)? If so, do they offer performance advantages over GCC? TIA for any info. Best, Andy Andy Liaw, PhD Biometrics Research PO Box 2000, RY33-300

Dear R-devel, Kurt had alerted me to the problem that the randomForest package that I maintain has been failing checks in R-devel. However, I just can't see why or where it's failing. I'd very much appreciate any pointer. The failure occur when running the example code in varImpPlot.Rd: > varImpPlot(mtcars.rf) Error in par(opar) : invalid value specified for graphical parameter

Dear R-help, Can some one tell me if it's possible to have conditional importFrom() in the package NAMESPACE file? Basically I'd like to know if it's possible to make the NAMESPACE file compatible with R 1.9.0 and those 1.8.1 and earlier. The problem is that I want to import cmdscale(), which is in `mva' prior to 1.9.0 but in `stats' post 1.9.0. Any pointer much appreciated!

Dear DevelopeRs, I'd like to ask those who develop R packages with compiled code to please try avoiding dependency on GCC (gcc/g77/gfortran/g++) specific features in the code, for the simple reason that there are non-GCC compilers out there that might choke on such features. I found this out back when I was trying to build R-2.3.0-to-be on our dual Opteron based Scyld cluster. Because the

Dear R-help, Has anyone tried running R on a Beowulf-type cluster? I can get R to run in batch (using R CMD BATCH) on a cluster, but am wondering if it is possible to get an interactive R session on a compute node. Right now, if I run: beorun --nolocal R I just get the R start-up message and back to the shell prompt. If I try bpsh 0 R I can get R started (but the R prompt does not

Dear R-help, I seem to recall that I can use "\t" to get tab in a string on a graphics device, but it doesn't seem to work. Try: lab <- "a\tb\tc" cat(lab, "\n") # works in the console output plot(1:5, main=lab) # no tabs in the title text(3, 3, lab) # no tabs in the text I get the same result both in the windows() and pdf() devices. Any ideas?

When running make check-all on R-1.9.0beta (2004-03-31) built with pgf77/gcc/g++ on the Opteron (running SLES8), I get four warnings about not finding the DESCRIPTION files for the packages in the VR bundle; e.g., cannot open file `/u1/scratch/R-1.9.0/tests/Packages/VR/spatial/DESCRIPTION' Error in tools:::.checkPackageDepends(dir = "/u1/scratch/R-1.9.0/tests/Packages/VR/spatial")

For those interested: I compiled R-1.9.0beta_2004-04-02 with pgf77/gcc/g++ and g77/gcc/g++, both _without_ fast BLAS. Both passed make check-all. Simple crossprod(m) for fairly large `m' shows that the version compiled with pgf77 is about 15% faster: [andy@leo:scratch]% echo "set.seed(1); m <- matrix(runif(5e7), 1e4); gc(); system.time(crossprod(m))" | R-1.9.0-PGI/bin/R

Hi all, I was playing with R-devel 2005-03-08 on winXP Pro (installed from Duncan's installer). My .Rprofile contains: options(defaultPackages=c(getOption("defaultPackages"), "mypkg"), chmhelp=TRUE) but "mypkg" has not yet been installed in the library/ directory of this installation. When Rgui starts, I do not get any error or warning, but upon

(I see this in both R-patched r43124 and R-devel r43233.) In the Argument section of ?mean: trim the fraction (0 to 0.5) of observations to be trimmed from each end of x before the mean is computed. Values outside that range are taken as the nearest endpoint. Then in the Value section: If trim is non-zero, a symmetrically trimmed mean is computed with a fraction of trim observations

Hello everyone, I'm trying to update the locfit package so that it passes package check in R 2.6.0. However, the check seems to think some of the functions with dot in the names are S3 methods (thus warns about the format of the \usage{} part) when they are not. Can anyone recommend a workaround for this? I tried reading R-exts, but couldn't find any hint. I'd very much appreciate