similar to: shash in unique.c

R community, As you may know, R's iconv doesn't work well converting to and from encodings that allow embedded nulls. For example > iconv("foo", to="UTF-16") Error in iconv("foo", to = "UTF-16") : embedded nul in string: '\xff\xfef\0o\0o\0' However, I don't believe embedded nulls are at issue here, but rather that R's iconv

Any idea why CHAR(asChar(STRING_ELT( produces NA whereas CHAR(STRING_ELT( gets a pointer to a string? It's generally expected that STRING_ELT should already be a character, but why the coercion does not work? Here is a simple example (consistent over R2.5.1-R2.6 rev 42284, I didn't check earlier versions, but it used to be different in 2.4): install.packages("inline")

For example, the following changes are necessary when i convert a Japanese hiragana into katakana in chattr. R code: > chartr("\u3041-\u3093","\u30a1-\u30f3","\u3084\u3063\u305f\u30fc") --- R-alpha.orig/src/main/character.c 2007-09-05 07:13:27.000000000 +0900 +++ R-alpha/src/main/character.c 2007-09-13 16:10:21.000000000 +0900 @@ -2041,6 +2041,16 @@

An NA in the rownames of a matrix (or dataframe) causes misalignment when the matrix is printed: R> x <- matrix(1:12, 3,4, dimnames=list(letters[1:3], LETTERS[1:4])) R> rownames(x)[2] <- NA R> x A B C D a 1 4 7 10 <NA> 2 5 8 11 c 3 6 9 12 The bug is in function Rstrlen, in src/main/printutils.c. MatrixRowLabel and MatrixColumnLabel (same file) rely on Rstrlen

Hello, I?d like to compare two strings internally the way R would, so I need Scollate which is not part of the authorized R api. So: - Can Scollate (and perhaps Seql) be promoted to api ? - If not what are the alternatives ? Using strcmp or stroll does not seem as general as Scollate. Romain PS: Here is some context: https://github.com/hadley/dplyr/issues/325

Hello, I'm trying to fetch a data frame through the C API, and have no problem doing this when all columns are numbers, but when there is a column of strings I have a problem. On the C-side the function looks like: SEXP myfunc(SEXP df), and it is called with a dataframe from the R side with: .Call("myfunc", somedataframe) On the C side (actually C++ side) I use code like this:

Full_Name: Webb S. Version: 2.0.1 OS: Linux Debian Submission from: (NULL) (199.174.209.10) Transcript: > b = 'a small string' > sprintf('foo: %s\n', b) [1] "foo: a small string\n" > a = matrix (ncol=100, nrow=1000, data=c(1,2,3,4,5)) > a.serial = serialize(a, NULL, ascii=TRUE) > sprintf('foo: %s\n', a.serial) Segmentation fault

Full_Name: Vilmos Prokaj Version: R 2.7.1 OS: windows Submission from: (NULL) (213.181.195.84) Dear developers, The following line of code (produced by a mistake) caused an infinite loop unique("a",c("a","b")) or also unique(1,1:2) I made a little investigation, and it seems to be that the following function from unique.c is looping infinitely static int

Can someone lend me a hand with extracting the dimnames from a SEXP? I've looked through R-exts, but I couldn't find an example. Here is the code I'm using to grab the jth column name and print it, but the colnames I'm getting are garbage. None of the following are working. void printInfo(SEXP ts) { int j; for (j=0; j<col; j++) {

Hi Everyone, I have a problem using some working 32-bit R code with 64-bit machine ( I am using version R-2.4.1 ). The problem occurs when I am trying to detect a NULL STRSXP type. ( Perhaps I am doing this detection in the wrong way? ) On 32-bit the following works, and correctly identifies if I am passing NULL or a valid string object: if ( v_dta_start != R_NilValue && STRING_ELT(

Hi. I am the maintainer of Rmpi package. Now I have a problem regarding the change of CHAR () in R 2.6.0. According to R 2.6.0 NEWS: ******* CHAR() now returns (const char *) since CHARSXPs should no longer be modified in place. This change allows compilers to warn or error about improper modification. Thanks to Herve Pages for the suggestion. ******* Unfortunately this

Hello, A post to R-Help by Oliver Soong reports what seems to be a bug specific to Windows (I'm on Windows 7). The original post is as follows: ---------------------------------------------------------------- from: Oliver Soong <osoong+r at gmail.com> to: r-help <r-help at r-project.org> date: Fri, 7 Dec 2012 22:07:49 -0800 subject: [R] file.link fails on NTFS Windows 7 64-bit,

Hi, I am trying to read in a rather large list of transactions using the arules library. It seems in the coerce method into the dgCmatrix, it somewhere calls unique. Unique.c throws an error when n > 536870912; however, when 4*n was modified to 2*n in 2004, the overflow protection should have changed from 2^29 to 2^30, right? If so, how would I change it in my copy? Do I have to recompile

Hi, First, thanks in advance. Some useful info: >version platform x86_64-unknown-linux-gnu arch x86_64 os linux-gnu system x86_64, linux-gnu version.string R version 2.15.1 (2012-06-22) I'm trying to use the table() function on a 2 column matrix that has 711 million rows (see below). However, it freezes. If I subset the matrix to be less than or equal

As most R developers maybe are already aware of, R version 1.2.0 introduced a new `generational' garbage collector which means that strings and vectors (and language objects) are handled differently from the numerical atomic types. >From ``Writing R Extensions'': Earlier code was written in a style like. VECTOR(dimnames)[0] = getAttrib(x, R_NamesSymbol);

I found a bug in one of the fourteen speed patches I posted, namely in patch-vec-subset. I've fixed this (I now see one does need to duplicate index vectors sometimes, though one can avoid it most of the time). I also split this patch in two, since it really has two different and independent parts. The patch-vec-subset patch now has only some straightforward (locally-checkable) speedups for

Below is a patch for setwd() to show path in error message. Current it just gives error messages such as: Error in setwd(libdir) : cannot change working directory with the patch it should (read untested) give: Error in setwd(libdir) : cannot change working directory to 'path/that/fails/' PATCH: % diff -u util.c "util,patch.c" --- util.c 2012-12-16 13:13:05.002249900

Hi, I'm quite knew in R, so I might not have the R specific jargon. But here is my problem, I'm trying to access and use variabels given by a function environment, more specifically the rho in do_optim in src/main/optim.c According to the documentation http://cran.r-project.org/doc/manuals/R-ints.html#The-_0027data_0027 the envsxp is defined as a tagged pairlist. "ENVSXP: Pointers

I have a daily job that attaches hundreds of pseudo-packages containing data as promise objects (DDP's, ref: g.data package), and plots the results to a multi-page pdf device. Sometimes it fails. Under R-2.2.1 it just gave segfaults. Under R-2.3.1 it gave this error message: *** caught segfault *** address (nil), cause 'memory not mapped' Traceback: 1:

I've been attempting to perform some analysis on a model that was interfaced with R (R calls a library that takes SEXPs and converts the data frames into the internal structures of data), and I notice that for small data.frames the vectors don't get corrupt (n<200-ish). When I pass in larger data.frames, the vectors will become corrupt. I've been PROTECTING the heck out of