similar to: Base R examples that write to current working directory

On 30.03.2018 00:08, Duncan Murdoch wrote: > On 29/03/2018 5:23 PM, Hadley Wickham wrote: >> Hi all, >> >> Given the recent CRAN push to prevent examples writing to the working >> directory, is there any interest in fixing base R examples that write >> to the working directory? A few candidates are the graphics devices, >> file.create(), writeBin(),

>>>>> Henrik Bengtsson <henrik.bengtsson at gmail.com> >>>>> on Fri, 30 Mar 2018 10:14:04 -0700 writes: > So, the proposal would then be to write to tempdir(), > correct? If so, I see three alternatives: > 1. explicitly use file.path(tempdir(), filename), or > tempfile() everywhere. I think it should clearly be '1.',

Martin et al, I have submitted a patch on bugzilla which fixes all of the examples I could easily find which were not already writing only to temporary files or switching to a temp directory before writing files to the working directory. https://bugs.r-project.org/bugzilla/show_bug.cgi?id=17403 Passes make check-devel so the examples run and the packages that were modified pass check. Best, ~G

So, the proposal would then be to write to tempdir(), correct? If so, I see three alternatives: 1. explicitly use file.path(tempdir(), filename), or tempfile() everywhere. 2. wrap example code in a withTempDir({ ... }) call. 3. Add an 'eval.path' (*) argument to example() and make it default to eval.path = tempdir(). This would probably be backward compatible and keep the code example

Is there any way to write (8-bit) bytes to a file which works on all [R] platforms? I have been looking at 1) writeBin 2) writeChar 3) cat and neither of them manage to write arbitrary sequences of bytes (0-255). For instance, I would like to create a binary file of length three containing the bytes 0, 1 and 0. I [R] I have the following vector of bytes: bfr <- c(0,1,0) 1) For

I have recently been using writeChar and writeBin to write binary files. These functions makes it very easy to write OS-independent files, which I am very happy with. I have however found a few issues, best illustrated by a short example > con <- file("test", open = "wb") > writeChar(as.character(c("ab", "ab")), nchars = c(3), con = con,

Hi, The man page for readBin has a small typo: --- a/src/library/base/man/readBin.Rd +++ b/src/library/base/man/readBin.Rd @@ -58,7 +58,7 @@ writeBin(object, con, size = NA, endian \code{readBin} and \code{writeBin} read and write C-style zero-terminated character strings. Input strings are limited to 10000 - characters. \code{\link{readChar}} and \code{\code{writeChar}} +

I have some functions that write an external text file for postprocessing by another program. Some instructions to the other program need to be indicated by null values (\000 or ^@). The function currently uses code like: writeChar(rawToChar(as.raw(0)), con) where con is a connection to the file. Previous to version 2.8.0 this worked fine. With 2.8.0 it still works, but I get a warning

Is this possible? I've tried both writeChar() and writeBin() to no avail. My goal is to serialize(ascii=FALSE) an object to a connection but determine the size of the serialized object before hand: sobject <- serialize(object,NULL,ascii=FALSE) len <- nchar(sobject) # # run some code here to notify listener on other end of connection # how many bytes I'm getting ready to send #

Trying to copy the (binary) header of a input file directly to an output file, I've had repeatable seg faults. The call: writeChar(hdr, outfh, nchars=6144) when hdr just contains one empty string seems to be the culprit. The stack traces weren't all that illuminating, with sig 11 in memory-related functions following this. But in src/main/connections.c it looks like do_writechar

Full_Name: Johnny Accot Version: 1.5.1 OS: Linux Submission from: (NULL) (198.4.83.52) Hi. I'm having a problem with the binary read/write functions. I'm writing a device driver in R (why not?) and of course I have to send a couple commands to the device. Typically, I send one byte, receive one acknowledgement byte, send another byte, receive an ACK, and so on. At least this is what

Dear all, I have written a little R program to convert images. See below. Within the loop over j (the filenames) memory consumption grows constantly. rm( ... ) inside the loop did not help. Memory does not grow if I remove the writeBin statements between the two #-------- marks. But obviously this is not solution I want... Thanks for any advice. Manfred Baumstark P.S. As I'm new to R:

Full_Name: Ken Yap Version: 1.6.1 OS: Linux (SuSE 8.0) Submission from: (NULL) (129.78.64.5) I'm trying to copy a file using readBin and writeBin. (The reason is to be able to pipe PostScript or PDF output to a socket later, this is just an experiment.) I do: zz <- file("foo.ps", "rb") r <- readBin(zz, character(), 1000000) yy <- file("bar.ps",

Hi, Since yesterday I'm seeing `R CMD check --as-cran` failures on the R-devel daily build (specifically, R Under development (unstable) (2018-01-09 r74100)) for multiple packages: * checking serialized R objects in the sources ... WARNING Found file(s) with version 3 serialization: ?build/vignette.rds? Such files are only readable in R >= 3.5.0. Recreate them with R < 3.5.0 or

All, At first glance, a recent commit to R-devel ( https://github.com/wch/r-source/commit/2c182014ecc8c2407a89092c9162d86046bd18da) appears to be related to long vector support. But as Henrik Bengtsson points out at https://github.com/HenrikBengtsson/Wishlist-for-R/issues/97#issuecomment-562659134, writeBin() still prohibits long vectors. Are there any plans to add long vector support to R

Hi, all, Recently, I met one issue when using socket between R & C++ to transmit R object. Would you pls help give me some suggestions? Many thanks! [Background]: I create a socket connection between R & C++ binary first, and then, want to use saveRDS() or save() in R to save the object into connection directly. So that the C++ binary can read the object, and send it to another remote R.

Hi, all, Recently, I met one issue when using socket between R & C++ to transmit R object. Would you pls help give me some suggestions? Many thanks! [Background]: I create a socket connection between R & C++ binary first, and then, want to use saveRDS() or save() in R to save the object into connection directly. So that the C++ binary can read the object, and send it to another remote R.

This Index: src/main/altrep.c =================================================================== --- src/main/altrep.c (revision 79385) +++ src/main/altrep.c (working copy) @@ -275,10 +275,11 @@ SEXP psym = ALTREP_SERIALIZED_CLASS_PKGSYM(info); SEXP class = LookupClass(csym, psym); if (class == NULL) { - SEXP pname = ScalarString(PRINTNAME(psym)); + SEXP pname =

To me it seems like writeBin() writes one char/byte more than expected. > con <- file("testbin", "wb") > writeBin("ttccggaa", con) > close(con) > con <- file("testbin", "rb") > readBin(con, what="character") [1] "ttccggaa" > seek(con, what=NA) [1] 9 > close(con) > con <-

Hello, I am trying to write some code in R to communicate over sockets via the STOMP protocol (http://stomp.codehaus.org/Protocol). As you can see, a null byte (ASCII 0) is used as the "over" signal. I'd like to be able to do something like this: write.socket(socket, "CONNECT\nlogin: me\npasscode: pass\n\n\000") However, R does not like it when you put "\000"