similar to: R-beta: ?faq example of scoping

Can Luke Tierney's recent S-new post on scoping be included in the R FAQ? I'm just going through my package and eliminating a few instances of "eval" as I hadn't realized the dangers. I noticed that one way I've used eval is for prompting, as in n <- eval(parse(prompt="Enter the number of singular values to use: ")) I presume this is not too dangerous, but

I would like to write a function that computes Tukey's 1 df for nonadditivity. Here is a simplified version of the function I'd like to write: (m is an object created by lm): tukey.test <- function(m) { m1 <- update(m, ~.+I(predict(m)^2)) summary(m1)$coef } The t-test for the added variable is Tukey's test. This won't work: data(BOD) m1 <- lm(demand~Time,BOD)

Prof. Tierney, Thanks very much for the info. Why does the loop work if I move the assignment out of the condition? E.g., the following works: i <- 0 while(i < 5) { i <- i + 1 if(i < 3) next print(i) } Regards, Andy > -----Original Message----- > From: Luke Tierney [mailto:luke at nokomis.stat.umn.edu] > Sent: Tuesday, October 02, 2001 3:36 PM > To: Liaw, Andy

Hi. I'm running into problems with using R functions as callback commands for buttons in Tk. The following Tcl/Tk script creates three buttons. If you press hello it prints hello world. If you press HALLO it prints HALLO WORLD. Not exciting, but I need an example... set tt [toplevel .tt] foreach i {"hello" "HALLO"} { pack [button $tt.b$i -text $i

Hi, I've trouble compiling R-0.49 (with both patches applied) on a HP-UX sim B.10.20 A 9000/819 machine: ranlib ../lib/libappl.a cd regex; make c89 -Ae -g -I../include -DPOSIX_MISTAKE -c regcomp.c cc: warning 422: Unknown option "-Ae" ignored. cc: "../include/regex.h", line 50: error 1000: Unexpected symbol: "regoff_t". cc:

There is a problem with 'default argument evaluation' when I use an existing function name as argument name : sintest <- function(x, y = 2, sin= sin(pi/4)) { ## Purpose: Test of "default argument evaluation" ## -------- Fails for R-0.49. Martin Maechler, Date: 9 May 97. c(x=x, y=y, sin=sin) } ## R-0.49: R> sintest(1) ##> Error in sintest(1) : recursive

Byron Ellis has been making some progress on a hdf5 library for microarray data (and any other thing you want to put in there). In doing so some issues have arisen that are of more general interest. 1) hdf5 supports annotation (through comments) so it would be nice if the comment function in R became generic. I think this is backward compatible and basically not really an issue of any

I see some code in R to attach finalizers to external pointer references (Register[C]Finalizer). Anyone have an example of how to code the finalizer? R_RegisterCFinalizer accepts a C function, but I can't see how to get it to operate on the pointer, since the pointer is not passed to the function when its called. RegisterFinalizer takes an R closure, but how is it called from R (tried

luke's demonstration of external references, at www.stat.umn.edu/~luke/file_0.0-0.tar.gz (accessible through the developer page) causes a segfault on solaris 2.8 as soon as library(file) is attempted. it runs fine on RH 7.2. the segfault on solaris occured for R 1.5.1 and 1.6 (8-25 image) a quick poke at gdb (which i can only get running for R 1.6, though this bug report is for 1.5.1)

The .Options vector had been introduced a while ago after my suggestion (see Ross's E-mail below). .Options$digits is used be default in several print methods (eg print.lm), however, deparse(.) e.g., uses options()$width, and not .Options$width. Another problem is that .Options is still not in the documentation (on-line help). Before one could add it there, we'd need ``the

Hi! I've been able to configure and make R (1,4,0 linux) except for the gnome support. I've checked all packages and libs mentioned in R-admin.pdf (and by Luke Tierny) to make sure that I have them and even using the following: ./configure --with-gnome --with-gnome-includes=/opt/gnome/include --with-gnome-libs=/opt/gnome/lib --with-libglade-config=opt/gnome/lib I still get: R is now

Does anyone know what exactly S_alloc() does? (Yes, it's porting time again ...) Thanks, -k =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- 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:

I'm curious if any of the core R developers have considered the possibility of hosting R (v2?) on the parrot common runtime environment. Perl6 will generate byte-code for parrot, as will some future version of python. I can imagine both drawbacks and advantages. Some advantages would be fast byte-code execution and freely mixing perl, python and R modules. Anyone looked into this? Tim

Can a C function wrapped with .Call return void? Or must it return a valid SEXP? Thnx. Tim -- Timothy H. Keitt Department of Ecology and Evolution State University of New York at Stony Brook Stony Brook, New York 11794 USA Phone: 631-632-1101, FAX: 631-632-7626 http://life.bio.sunysb.edu/ee/keitt/ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing

By my reading, R has a hard limit on INT_MAX bytes for vector allocations. On the sparcv9 architecture, INT_MAX is a 32 bit quantity, even though pointers can be 64 bits. Has any thought been given to use of > 2GB of virtual memory on systems like this? -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read

In S(plus), I can write functions using code fragments like if(!is.loaded(symbol.C("my_C_fun"))) dyn.load("......../my_C_fun.o") r <- .C("my_C_fun", x = x, n = n, ... ) which I would like to have in R, too. The S-plus help page on this subject says : S+>> Code Availability S+>> S+>> DESCRIPTION: S+>> is.loaded

I wonder if it was possible (and desireable) to implement means to protect data objects (and functions) from overwriting them. So for instance: > x <- 5 > protect(x) > x <- 8 Error: x is read only Or would that be against the philosophy of R to be compatible to S?! Just a RFC ;-) Yours, Christoph. ps. Your probably know the situations that let you think of such a feature

Hi, R-1.4.0 on ES40 under OSF 5.1. I use gcc version 3.0.3 During gnu make I have the message : dumping R code in package `methods' Error in dyn.load(x, as.logical(local), as.logical(now)) : unable to load shared library"/usr/local/R1.4.0/library/methods/libs/methods.so": dlopen: /usr/local/R-1.4.0/library/ctest/libs/ctest.so: symbol "dansari" unresolved Execution

Has anyone experimented with the Network Common Data Format (netcdf) described at http://www.unidata.ucar.edu/packages/netcdf for archiving data? Is this format widely used outside of atmospheric research? -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info",

Hi, all. I'm running R on a beowulf system, with software that can take a list of single-processor jobs and parcel them out over the system. (In case it's of interest, they're dual pentium 866 machines connected by fast ethernet.) The administrators of the system found that I was causing a huge load on the file server, and when they investigated it turned out that each process was