similar to: A question about embedded R

In a C++ extension to R (v 1.8.1), I've been experimenting with a generic "push back" function to tack one value at a time onto the end of an R vector created within the extension. After calling this function a certain number of times Rgui.exe (I'm writing in Windows using Visual Studio .NET 2003) will fail with an Access Violation, which doesn't happen when I pre-allocate

Dear R Gurus, I would very much appreciate some help with this code snippit from my RODBC package. R crashes or exhibits bizarre behaviour when repeatedly fetching large numbers of rows. Examples: > odbcFetchRows(0,max=50000)->xx > odbcFetchRows(0,max=50000)->xx > odbcFetchRows(0,max=50000)->xx > odbcFetchRows(0,max=50000)->xx > odbcFetchRows(0,max=50000)->xx 3rd

Hello everyone, I try to write a c++ code which calls embedded R and uses some of R internal functions. What I read is just lots of macro names defined in the Rinternals.h or Rdefines like R_Parse, Rf_install and so on. But where can I get the detailed information about the parameters of these macro? For example, what about the parameters of SEXP R_ParseVector(SEXP, int, ParseStatus *)?

Dear all, when working on a project with embedded R, I found out that R-2.0.0 causes a problem where older versions worked OK. Rf_findVar(...) causes the following error when used to find a generic function (such as print): fun = Rf_findVar(...); R_tryEval(fun, ...); Error in function (object, ...) : Invalid generic function in usemethod Alternatively, using Rf_findFun(...) seems OK in this

Hello everyone, I am just trying to colloct all my function into a new packages. I met two questions which hurt me so much: 1. when I use the "prompt" to help to write Rd file for a variable x which is character vector, say x <- c("a","b"), it always give the error informaion: Error in get(x, envir, mode, inherits) : variable "a" was not found.

Hello folks, I'm embarking on a project to embed R into the Apache web server, and I'd like your help. Currently, I'm looking for a way for R code to call back into a shared library from which the R shared library was loaded. Essentially, apache starts and loads mod_R.so which runs an initialization routine which calls Rf_initEmbeddedR() and the following code: /* override to

Full_Name: R Embedder Version: 2.7.2 OS: win XP SP 2 Submission from: (NULL) (83.25.35.249) I'm having problems using embedded R. I try to adapt examples from "tests/Embedding/". Everything works fine except when I try to reinitialize R for the second time in the same program. I need to reinitialize correctly because my code is some kind of .dll plugin to an external application.

Hello everyone, I am probably not the only one having trouble with this package but here goes. I want to install XML on Ubuntu. I installed libxml2-dev and everything works out fine until I get the following: Error in reconcilePropertiesAndPrototype(name, slots, prototype, superClasses, : No definition was found for superclass "namedList" in the specification of class

Hi folks. I posted this question a few days ago, but maybe it got lost because of the code I included with it. I'm having a problem using the SET_LENGTH() macro in an R extension I'm writing in C++. In a function within the extension I use SET_LENGTH() to resize R vectors so as to allow the concatenation of single values onto the vectors -- it's a "push back" function to

I tried to build (and install) XML_3.95-0.1.tar.gz on FreeBSD 10.0-CURRENT amd64, but it stopped during the check of R_HAS_REMOVE_FINALIZERS (full log appended): ---------------------------------- R CMD INSTALL XML_3.95-0.1.tar.gz [..snip..] Checking for 1.8: -DR_HAS_REMOVE_FINALIZERS=1 -I/usr/local/include/libxml2 -I/usr/local/include Using libxml2.* checking for gzopen in -lz... gcc46

I am trying to integrate OpenOffice Calc (OO) with R. One of the steps I am taking is to create a very simple command line C program with the R shared lib embedded in it. It would simply pass an R/S expression to R, print the result, and catch errors. I know this is "overkill," but it is a step toward something larger. Has anyone done this before? If so, I would love to check out

Hello: I was hoping to get some advice about how to return a tree (basically a linked list -- with each node containing a parent, left, and right node pointers) from a C routine back into R. Each node itself contains several attributes (a double, a char *, an int, and a void * ) Initially I was thinking I could just return to R a SEXP containing a pointer to the Root Node, but then realized

Hi, I want to read a text file into R with .Call(). So I define some NEW_CHARACTER() to store the chracters read and use SET_STRING_ELT to fill the elements. e.g. PROTECT(qNames = NEW_CHARACTER(10000)); char *foo; // This foo holds the string I want. while(foo = readLine(FN)){ SET_STRING_ELT(qNames, i, mkChar(foo))); } In this way, I can get the desired character from qNames. The only problem

I am writing bindings to the neural network simulator SNNS. At present I have used only .C interface, now I'm studying .Call interface. I have adapted the example from page 77 of r-exts.pdf, however, it crashes R. I use MingW as recommended by Duncan Murdoch. Please, tell me what I am missing. The code is below. Thank you. SEXP snns_getVersion(void) {SEXP version; char *v;

i'd like to use the C interface to R in a program i'm writing. as a starting point, i'm trying to create a very simple C program that uses R. i've read the R documentation on this, but i'm having trouble figuring out where SEXP is defined and how to use it. i noticed someone else on this list also tried to use the C interface, but they ran into similar problems:

Hi, I have an SEXP obj in a C function called via .Call(). The obj is protected (in fact it is an argument to .Call and therefore automatically protected). If I set an attribute of obj does the attribute become protected too? Here is an example SEXP foo(SEXP obj) { SET_NAMES(obj, NEW_CHARACTER(3)); /* are names protected or not? */ ... } Thanks, Vadim [[alternative HTML version

Hi list, It may be a FAQ, but I searched the web and Uni of Newcastle Maths and Stats and R mailing list archive on this issue but was unable to find a solution. I would appreciate any pointer to help me solving this. I am using R version 2.10.0 (2009-10-26) on linux mandriva 2010.0 I tried to install the XML_2.6-0.tar.gz package both with install.packages('XML', dep=T) from within R

Hi, It seems that new("externalptr") is always returning the same instance, and not a new one as one would expect from a call to new(). Of course this is hard to observe: > new("externalptr") <pointer: (nil)> > new("externalptr") <pointer: (nil)> since not a lot of details are displayed. For example, it's easy to see that 2

Hello, I am new to this list. ?I am trying to compile the current svn version of kdeedu on an amd64 linux machine ?which uses R and I get the following compiler output. ------------------------------------------- ?79%] Building CXX object cantor/src/backends/R/rserver/CMakeFiles/cantor_rserver.dir/rserver.o $SOURCES/kdeedu/cantor/src/backends/R/rserver/rserver.cpp: In member function

Hello everyone, I've just attempted to build R-1.4 on Compaq Tru64 (I'll enclose the text from bug.report() from R-1.3.1 at the end.) The relevant part of the log is below. Any ideas? gcc -shared -o methods.so do_substitute_direct.o methods_list_dispatch.o method_meta_data.o slot.o -L/usr/local/lib /usr/ucb/ld: Warning: Unresolved: TYPEOF Rf_error Rf_protect Rf_substitute