similar to: Integrating Java, C++ and R

> From: Yuandan Zhang > > If you want to call R from perl, why don't you do a simple > system call like: > > $callR="/usr/loca/bin/R CMD BATCH plotscript.R"; > system ($callR); > > It is not necessary to start X display if anything can be > done in background But the problem is jpeg()/png() are not available unless an X display is available to the

Hi All, Anybody know how to make R emit base64 encoded text in some way that perl can grab it, instead of planting a file on your harddrive when calling JPEG or PNG? I've managed to get these scripts to work and put a file on the harddisk #!/usr/bin/perl -Wall # by jin kee. a simple script to demonstrate # the needed steps to get R to emit a jpeg. use strict; my($callR, $callRold); # need

A Simon pointed out the interrupt is recorded but not processed until a safe point. When reading from a fifo or pipe R runs non-interactive, which means is sits in a read() system call and the interrupt isn't seen until sometime during evaluation when a safe checkpoint is reached. When reading from a terminal R will use select() to wait for input and periodically wake and check for

OK, I managed to create an example without callr, but it is still somewhat cumbersome. Anyway, here it is. Terminal 1: mkfifo fif R --no-readline --slave --no-save --no-restore < fif Terminal 2: cat > fif Sys.getpid() This will make Terminal 1 print the pid of the R process, so we can send a SIGINT: Terminal 3: kill -INT pid The R process is of course still running happily. Terminal 2

Gabor, I think you're talking about two independent things. You can interrupt the computation, no question about that. It's just that if you send an interrupt while you're *not* doing any computations, it will be signaled but not raised until the interrupts are checked since there is no one to check it. This goes back to my original response - the interactive REPL calls

Can you give an example without callr? The key is how is the process stated and what it is doing which is entirely opaque in callr. Windows doesn't have signals, so the process there is entirely different. Most of the WIN32 processing is event-based. Cheers, Simon > On Apr 30, 2019, at 4:17 PM, G?bor Cs?rdi <csardi.gabor at gmail.com> wrote: > > Yeah, I get that they are

Unfortunately --interactive also makes the session interactive(), which is bad for me, as it is a background session. In general, I don't want the interactive behavior, but was wondering if I could send as SIGINT to try to interrupt the computation of the background process, and if that does not work, then I would send a SIGKILL and start up another process. It all works nicely, except for

withr:::set_makevars() can give that error if the makefile named by the 'old_path' argument (default "~/.R/Makevars) contains more than one definition of a variable of the form 'name=value'. You can see what file it is reading and its contents by using the trace() function: trace(withr:::set_makevars, quote({ cat(old_path, "\n"); writeLines(paste0(" ",

Hi All; This problem has come about from trying to learn some of the review practices recommend by rOpensci. One of them is to use the package goodpractice. After installing goodpractice, it kept failing on my own packages which are under development, and I was concerned something was funny in my own , so I have a fork of the package rerddap, and I tested goodpractice on that. I get the

Yeah, I get that they are async. What happens is that the background process is not doing anything when the process gets a SIGINT. I.e. the background process is just listening on its standard input. AFAICT for an interactive process such a SIGINT is just swallowed, with a newline outputted to the terminal. But apparently, for this background process, it is not swallowed, and it is triggered

Hi All, I realize that this is not a really nice reprex, but anyone has an idea why a background R session would "remember" an interrupt (SIGINT) on Unix? rs <- callr::r_session$new() rs$interrupt() # just sends a SIGINT #> [1] TRUE rs$run(function() 1+1) #> Error: interrupt rs$run(function() 1+1) #> [1] 2 It seems that the main loop somehow stores the SIGINT it

awesome, merci Dirk! and my apologies for not scrolling down better, I failed to see that the 18.04 update was linked to the R 3.5 issue . Further, please forgive my impatience, but I was very curious to see if the package tidyverse could be installed: I have the impression that it is short of being installed, missing just a few simple packages (with no apparent non-R dependencies). Indeed, a

Interrupts are not synchronous in R - the signal only flags the request for interruption. Nothing actually happens until R_CheckUserInterrupt() is called at an interruptible point. In you case your code is apparently not calling R_CheckUserInterrupt() until later as a side-effect of the next evaluation. Cheers, Simon > On Apr 30, 2019, at 3:44 PM, G?bor Cs?rdi <csardi.gabor at

Thanks for Professor Ripley and Brad's reply. UnsatisfiedLinkError: SJava.dll is gone. But, I have another problem. I have been trying to figure out, but, without success. Here is my test.java: import java.io.*; import org.omegahat.R.Java.REvaluator; public class test { public static void main(String args[]) { System.out.println("Hello...");

Hi, I have come across a csmith generated test case that made the MachineVerifier spit out: *** Bad machine code: Multiple connected components in live interval *** Having looked at what this might mean, it seems that ConnectedVNInfoEqClasses::Classify() was called on the LI in question by the verifier, and that it returned two equivalence classes, instead of just one, which is demanded by

Dear all: I need the help desparately. The code is attached below. If you guys don't mind take a look at the code below and see how to fit speex's AEC into it. Help me look at the #defines, and give me some suggestions on the AEC parameters, I totally have no idea about them. Feel free to do anything with the code, if it is by any chance valuable. Any ideas or suggestions or sharing

Hi Jonas, Could you file a PR with your test case please? Thanks, -Quentin > On Apr 16, 2015, at 3:50 PM, Andrew Trick <atrick at apple.com> wrote: > >> >> On Apr 16, 2015, at 6:58 AM, Jonas Paulsson <jonas.paulsson at ericsson.com <mailto:jonas.paulsson at ericsson.com>> wrote: >> >> Hi, >> >> I have come across a csmith generated

Hi Jonas, When is the MachineVerifier complaining? I mean after which pass? Thanks, -Quentin > On Apr 17, 2015, at 7:17 AM, Jonas Paulsson <jonas.paulsson at ericsson.com> wrote: > > Hi, > > thanks for answering, but the COPY is there already from after isel. It is a copy of a subreg, after a a call returning 64 bits. > > call

Hi Jonas, > On Apr 20, 2015, at 4:03 AM, Jonas Paulsson <jonas.paulsson at ericsson.com> wrote: > > Hi Quentin, > > After Simple Register Coalescing. Is the code you have pasted with the PHIs feed to the register coalescer? I am trying to understand the setting to help debugging the problem. Also, what does -debug-only=regalloc tell you? Thanks, -Quentin > >

Hi, After loading R 4.0.0 on Ubuntu 20.04. R version 4.0.0 (2020-04-24) -- "Arbor Day" Copyright (C) 2020 The R Foundation for Statistical Computing Platform: x86_64-pc-linux-gnu (64-bit) R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()'