similar to: S4 Dispatching

Had been looking into Luke Tierney's R_AllocatePtr() and was left with a question about exactly when does R reclaim heap memory. Implication of 'simpleref.nw' is that one can allocate C data on the R heap, and as long as pointer object is alive, the data and pointer will remain valid. But it calls allocString() which is implemented using R_alloc(). 'Writing R Extensions" says

I have some code where the primary dispatching is on other parameters so I'd like not to have to create a set of functions for "matrix" and another duplicate set for "array". But the class union technique isn't working as implemented below and I don't have my Green book with me. How do I fix my infinite recursion problem?

I recently encountered this and was wondering if someone could explain what happened. Basis of question involves what the difference between the calls makes as the end result is the same: > identical(matrix(1:8, nrow = 1), array(1:8, c(1, 8))) TRUE If I run the code below as shown, I get the following: > foo(1:8, 4) foo (vector, numeric) val = 4 foo (matrix, ANY) val = 500 foo

On Mon, 6 Feb 2006 18:12, Simon Urbanek wrote: > On Feb 6, 2006, at 5:24 PM, Paul Roebuck wrote: > >> Tried on R-Sig-Mac with no responses, but I need some kind >> of answer. >> [...] >> Does the following work on your system? > > Interesting, no, it doesn't either. For png and pdf I use > Quartz + quartz.save (it produces much nicer results) so > I

What a delicious example! (I'm taking the liberty of sharing it with r-devel, since it raises some good issues.) You have two questions, presumably: 1 - how could the order of the setMethod calls make a difference in the results? 2 - what's causing the infinite loop & how could it be avoided, reliably? Second question first. The danger sign is the "vector" method:

I get the following error trying to connect to a MySQL database: > library(RMySQL) Loading required package: DBI > drv<-dbDriver("MySQL") > con<-dbConnect(drv, user="hothand", password=xxx, host="localhost", dbname="hh03"); Error in mysqlNewConnection(drv, ...) : RS-DBI driver: (could not connect hothand at localhost on dbname

Dear list, I'm trying to understand the graphical parameters by a systematic exploration of the par() function (if you are interested by the result it's here http://pbil.univ-lyon1.fr/R/fichestd/tdr75.pdf, the comments are all in french but it's pure R code under Sweave). I have a problem with par(tmag) illustrated by the following code:

Hi all I had written a gdb macro to dump the string representation of an SEXPREC type when I realised everything I needed was in inspect.c already in the typename() function. However, the typename function doesnt handle the RAWSXP type, so if possible, could the following patch be applied (I've just put in inline as it is a trivial 1-liner)? Index: src/main/inspect.c

Dear r-helpers, I can't get lsa to run because: > library(lsa) Loading required package: Rstem Error in library(pkg, character.only = TRUE, logical = TRUE, lib.loc = lib.loc) : 'Rstem' is not a valid package -- installed < 2.0.0? In addition: Warning message: cannot create HTML package index in: make.packages.html() > install.packages('Rstem') Warning in

Hi, I'm using R_MakeExternalPtr() to store handles to (COM) objects in a SEXP. The code basically is sexp = R_MakeExternalPtr(handle,R_NilValue,R_NilValue); R_RegisterCFinalizerEx(...); After creating the sexp, LENGTH(sexp) returns some quite large integer value. It seems like an "unitialized" value. Can I safely assume, that an SEXP of type EXTPTRSXP can only contain a single

Full_Name: Todd Bailey Version: 2.1 OS: Mac OS-X 10.4.3 Submission from: (NULL) (87.112.79.124) sub returns garbage in some strings when replacing something with nothing and fixed=TRUE. For example: > a=c('hello','hello'); sub('lo','',a,fixed=TRUE) [1] "hel" "hel\0\0" > a=c('hello','hello');

Hi all, I've just installed R on my Mac & PC. The base demo run fine.. But I'm encountering several pb with some packages (installed using CRAN binaries using the menu) - Lattice: > demo(lattice,package='lattice') demo(lattice) ---- ~~~~~~~ Type <Return> to start : > require(grid) [1] TRUE > old.prompt <- grid.prompt(TRUE) > old.settings

R-helpers, Is there an easy way to call an external (C) program using .C or .Call without including the code in a package. I know how to do it using system(), but that doesn't seem to be a permanent or portable solution. Initially I tried: .Call('filepath.to.c.function', arg1) and got this error: Error in .Call("filepath.to.c.function", "arg1", :

Full_Name: Ed Borasky Version: 1.8.1 OS: Windows XP Professional Submission from: (NULL) (208.252.96.195) R 1.8.1 seems to be running into a memory allocation problem in the "aggregate" function. I have a rather large dataset (14 columns by 223,000 rows -- almost 40 megabytes) and a script that performs some processing on it. The system is a 768 MB Pentium 4. Here's the console

hi everybody, I noticed the following: in one of my scripts 'layout' is used to generate a (approx. square) grid of variable dimensions (depending on no. of input files). if the no. of subplots (grid cells) becomes moderately large (say > 9) I use a construct like ###layout grid computation and set up occurs here### ... opar <- par(no.readonly = T);

I have a number simple R functions written for the biologists I work with. These functions will evolve, and the documentation will get steadily better. I hope to put them in a package on a local webserver, along with lots of help files, so that the users can easily update their installation. The functions are pure R, with no compiled code, but alias, I cannot figure out how to build this

I have been running R CMD check for the first time on of our own packages, which otherwise builds, installs and runs just fine. The package depends on package akima and suggests package multtest; suggesting multtest is indicated because a) it loads a lot of other Bioconductor packages, very slowly, and b) it is only needed for one specific subroutine, which executes require(multtest)

Hi, I'm trying to add points to 2 plots on the fly using par(mfg=vector) so switch between them. However, the appropriate scales aren't switched when changing from one plot to another, e.g. par(mfcol=c(2,1)) plot(1,1, col="blue") # blue plot plot(1.2,1.2, col="red") # red plot points(1.1,1.1) # appears to bottom left of red point par(mfg=c(1,1)) #

I tried to install wxRuby on my Mac, but I get the following error. g++ -fno-common -g -O2 -pipe -fno-common `wx-config --cxxflags`    -I. -I/usr/local/lib/ruby/1.8/powerpc-darwin7.9.0 -I/usr/local/lib/ruby/1.8/powerpc-darwin7.9.0 -I.   -x objective-c++  -c htmleasyprinting.cpp htmleasyprinting.cpp: In static member function `static VALUE    WxHtmlEasyPrinting::PrinterSetup(int, VALUE*,

[some de-capitalization of *SXP done manually by mailing list maintainer ; the originally was caught as potential spam. MM] I have a little R program that crashes with the message xmalloc: out of virtual memory The code has a repeat{} loop that watches the sizes of some files. When there's an increase it updates things by reading the last 65 lines of each file, doing some