similar to: Error in writeBin(object, con, size = 2)

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",

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 <-

Hi all, I'm having problems trying to export binary arrays from R and importing them into fortran (linux openSUSE 10.3 (x86_64), gfortran compiler, fortran 90/95 program). Let's say the problem can be expressed as: R part ------------ >whini <- runif(1000) >writeBin(whini,"fwhini.dat") f90 part ------------ PROGRAM foo INTEGER, PARAMETER :: DP = KIND(1.0D0) INTEGER ::

Hi, The latest version of R had some changes to functions "readbin() and writeBin() [which] now support raw vectors as well as filenames and connections.". As a result I am working on retiring "raw2bin" and "bin2raw" functions from "caTools" package which do exactly the same. Thanks to Prof. Ripley for bringing this change to my attention. Which brings me

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}} +

Dear RHelp-list, ?I want to write at a specific position in a file without reading all the file because it is very large and I cannot read it in my RAM. But I miss something about the use of the command writeBin in conjunction with seek. In the example bellow the seek commands works well with the readBin command but not with writeBin, the writeBin command write from the beginning of the file

I am trying to open an existing binary file, seek to a position in the middle, and then write one byte, while keeping the already existing data after that byte. It seems to me that I am unable to open a connection to a binary file in both read and write mode. I can open the "r+b" binary file connection and seek around, but I can't write to the file. And looking at the function

Hi all - I'm playing around with an attempt to do some serial communication from within R to a microcontroller board. I open a connection: zz = file("/dev/ttyUSB0",open="a+") ## text mode ... when I execute writeLines("0",con=zz) I know the board receives the "0" because the board's serial comm LEDs light up when submit the command at the R

I have been trying to use the gunzip function in the R.utils package. It opens a connection to a gzfile, uses readBin to read from that connection, and then uses writeBin to write out the raw data to a new file. This works as expected under linux/mac, but under Windows, I get: Error in readBin(inn, what= raw(0), size = 1, n=BFR.SIZE) : negative length vectors are not allowed A simple

Dear R Devel, Since Linux moved away from using a file-system interface for audio, I think it is necessary to write special libraries to interface with audio hardware from various languages on Linux. In R, it seems like the appropriate datatype for a `snd_pcm_t` handle pointing to an open ALSA source or sink would be a "connection". Connection types are already defined in R for

I want to write to M, using row and columns taken from A and B, with values from C. C is a lot longer than A and B, so only the first 67420 elements of C are used in my loop.So how can I improve it to take then the next 67420 and write it to new file and so on till the 248th 67420. Many thanks library(Matrix) M <- Matrix(-9999, 360, 720) ## creat matrix with 720 columns and 360 ro ws

Dear R Gurus, for some purpose i have to use a socket connection, where i have to read and write both text and binary data (each binary data package will be preceeded by a header line). When experimenting, i encountered some problems (with R-2.0.1 under different Linuxes (SuSE and Gentoo)). Since the default mode for socket connections is non-blocking, i first tried socketSelect() in order to

The public connection API is defined in https://github.com/wch/r-source/blob/trunk/src/include/R_ext/Connections.h I'm not sure of a good pedagogic example; people who want to write their own connections usually want to do so for complicated reasons! This is my own abandoned attempt

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:

Hellow everyone, This code bellow will calculate average daily wind speed(measurements are taken every three hours).Any ideas how to take the Min and Max instead of average. library(Matrix) setwd("C:\\Users\\aalyaari\\Desktop\\img") listfile<-dir() long <- file("C:\\Users\\aalyaari\\Desktop\\New folder (5)\\inra.bin", "rb") A=readBin(long, integer(),

Hi, I'm running into more issues when reading data from a gzfile connection. If I read the data sequentially with successive calls to readBin(), the data I get looks ok. But if I call seek() between the successive calls to readBin(), I get corrupted data. Here is a (hopefully) reproducible example. See my sessionInfo() at the end (I'm not on Windows, where, according to the man page,

On 15/07/2017 11:33 AM, Anthony Damico wrote: > hi, i realized that the segfault happens on the text file in a new R > session. so, creating the segfault-generating text file requires a > contributed package, but prompting the actual segfault does not -- > pretty sure that means this is a base R bug? submitted here: > https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=17311

Hi all, in the last time I've intensively used Rstreams to read and write from binary files. Now I'm wondering if it is possible to use Rsteams functions with gzipped files. But I haven't found the trick: > p1c.gzip <- gzfile("daten/p1c_all.mea.gz", open="rb") > readBin(p1c.gzip, integer(), n=64,size=2) [1] 84 1 400 1 749 0 0 0

I have two binary files(rasters) with the same dimensions. The first file is called `over` and the second is `corr`. I want to replace values in `over` by `NA` whenever `corr` is greater than 0.5. to read the two files we can use: conne <- file("C:corr.bin","rb") over <- readBin(conne, numeric(), size=4, n=1440*720, signed=TRUE) frf <-

yep, you're right, after some initial clean-up and running with or without --as-cran R CMD check gives a NOTE * checking compiled code File ?socketeer/libs/socketeer.so?: Found non-API calls to R: ?R_GetConnection?, ?R_new_custom_connection? Compiled code should not call non-API entry points in R. See 'Writing portable packages' in the 'Writing R