similar to: Detect a terminated pipe

Thanks for looking into it, your approach sounds good to me. See also R_has_methods_attached() (https://github.com/wch/r-source/blob/42ecf5f492a005f5398cbb4c9becd4aa5af9d05c/src/main/objects.c#L258-L265). I'm fine with Rscript not loading "methods", as long as everything works properly with "methods" loaded but not attached. -Kirill On 19.04.2016 04:10, Michael

See also .isMethodsDispatchOn, which is what trace uses to decide if the methods package needs to be loaded. ~G On Tue, Apr 19, 2016 at 5:34 AM, Michael Lawrence <lawrence.michael at gene.com > wrote: > Not sure why R_has_methods_attached() exists. Maybe Martin could shed > some light on that. > > On Mon, Apr 18, 2016 at 11:50 PM, Kirill M?ller > <kirill.mueller at

On 06.06.2017 10:07, Martin Maechler wrote: >>>>>> Kirill M?ller <kirill.mueller at ivt.baug.ethz.ch> >>>>>> on Mon, 5 Jun 2017 17:30:20 +0200 writes: > > Hi I've noted a minor inconsistency in the documentation: > > Current R-exts reads > > > s = PROTECT_WITH_INDEX(eval(OS->R_fcall, OS->R_env), &ipx);

Does it make sense to be able to load an S4 object without the methods package being attached? I'm not sure implementation-wise how easy this would be, but it seems like any time there is an S4 object around, the methods package should be available to deal with it. ~G On Tue, Apr 19, 2016 at 7:34 AM, Michael Lawrence <lawrence.michael at gene.com > wrote: > Right,

>>>>> Kirill M?ller <kirill.mueller at ivt.baug.ethz.ch> >>>>> on Thu, 8 Jun 2017 12:55:26 +0200 writes: > On 06.06.2017 22:14, Kirill M?ller wrote: >> >> >> On 06.06.2017 10:07, Martin Maechler wrote: >>>>>>>> Kirill M?ller <kirill.mueller at ivt.baug.ethz.ch> on

Hi I've noted a minor inconsistency in the documentation: Current R-exts reads s = PROTECT_WITH_INDEX(eval(OS->R_fcall, OS->R_env), &ipx); but I believe it has to be PROTECT_WITH_INDEX(s = eval(OS->R_fcall, OS->R_env), &ipx); because PROTECT_WITH_INDEX() returns void. Best regards Kirill

Scenario: An S3 method is declared for an S4 base class but called for an instance of a derived class. Steps to reproduce: > Rscript -e "test <- function(x) UseMethod('test', x); test.Matrix <- function(x) 'Hi'; MatrixDispatchTest::test(Matrix::Matrix())" Error in UseMethod("test", x) : no applicable method for 'test' applied to an

Hi I haven't found a way to produce a tabulation from factor data with NA values using xtabs. Please find a minimal example below, it's also on R-pubs [1]. Tested with R 3.1.2 and R-devel r67720. It doesn't seem to be documented explicitly that it's not supported. From reading the code [2] it looks like the relevant call to table() doesn't set the "useNA"

Dear list For my work, it would be helpful if rpart worked seamlessly with an empty model: library(rpart); rpart(formula=y~0, data=data.frame(y=factor(1:10))) Currently, an unrelated error (originating from na.rpart) is thrown. At some point in the near future, I'd like to release a package to CRAN which uses rpart and relies on that functionality. I have prepared a patch (minor

Dear all, In my package I have a computational expensive Rnw file which can't pass R CMD check. Therefore I set eval=FALSE in the Rnw file. But I would like to have the pdf vignette generated by the Rnw file with eval=TRUE. It seems to me a static pdf vignette is an option. Any suggestions on this? Thanks, Zhu Wang **Connecticut Children's Confidentiality Notice** This e-mail

Hi Accesses the $new method for a class defined in a package fails if the methods package is not loaded. I have created a test package with the following single code file: newTest <- function() { cl <- get("someClass") cl$new } someClass <- setRefClass("someClass") (This is similar to code actually used in the testthat package.) If methods is not loaded,

On 05/05/2016 10:11, Uwe Ligges wrote: > Actually this also happens under Linux and I had my R processes killed > more than once (and much worse also other processes so that we had to > reboot a server, essentially). I found that setting RLIMIT_AS [1] works very well on Linux. But this requires that you cap memory to some fixed value. > library(RAppArmor) > rlimit_as(1e9) >

Hi Quite a few R packages are now available on GitHub long before they appear on CRAN, installation is simple thanks to devtools::install_github(). However, it seems to be common practice to keep the .Rd files (and NAMESPACE and the Collate section in the DESCRIPTION) in the Git tree, and to manually update it, even if they are autogenerated from the R code by roxygen2. This requires extra

Hello, >From the doc, it says: "isOpen returns a logical value, whether the connection is currently open." But actually it seems to die on closed connections: > con <- file() > isOpen(con) [1] TRUE > close(con) > isOpen(con) Error in isOpen(con) : invalid connection Is it expected ? Tested on R-3.0.2 and R version 3.1.0 Patched (2014-06-11 r65921) on linux x86_64

I noticed the following file descriptor leak when I couldn't remove a package unless I shut down the R session that had loaded and used it. The function that triggered the problem printed the output of a call to parse(). Each time one prints a srcref a connection is opened and not closed. It looks like it happens in as.character.srcref's call to getSrcLines, which has some logic I

As far as I can tell, 'isOpen' cannot return FALSE in the case when 'rw = ""'. If the connection has already been closed by 'close' or some other function, then isOpen will produce an error. The problem is that when isOpen calls 'getConnection', the connection cannot be found and 'getConnection' produces an error. The check to see if it is

Hi! I'm wondering if there's a smart way around this: fileName= (some valid file on your system) > fileCon=file(fileName, open="rt") > l<-readLines (fileCon, n= 1) > > isOpen(fileCon) [1] TRUE > close(fileCon) > isOpen(fileCon) Error in isOpen(fileCon) : invalid connection How do you test for a file being closed if isOpen gives you an error

Dear all, I do not completely understand following behaviour : > con <- file("test.txt") > isOpen(con) [1] FALSE > open(con) > isOpen(con) [1] TRUE > close(con) > isOpen(con) Error in isOpen(con) : invalid connection > str(con) Classes 'file', 'connection' atomic [1:1] 3 ..- attr(*, "conn_id")=<externalptr> Why do I get an

Hello, I have R as a socket server that computes R code sent by some scripts (the clients). These scrips send R code to generate models (SVM). The problem is that first models are generated in less than one second and one hour later, the same models are generated in more than ten seconds (even training with same data). If I restart the server , then it works well (fast). I don't know if I have

> # creating a file > cat("sddfasdf", file="tempfile") > showConnections() class description mode text isopen can read can write > con <- file("tempfile", "r") > readLines(con) [1] "sddfasdf" Warning message: incomplete final line in: readLines(con, n, ok) > showConnections() class description mode text isopen