Displaying 20 results from an estimated 7000 matches similar to: "R-functions in C-Code"
2011 Jan 20
1
Calling C++ from R
Hi All,
I am new to this area and use Rcpp to call C++ from R and try to build the
package under Windows 7. I use Rtools and R 2.10.1 32bit. Everything works
fine with me, except using R functions like "rnorm" or "runif" in the C++
code. When I use "R CMD check" the package, it always return error
** libs
making DLL ...
g++
2012 Jul 14
2
rgamma function
Hi,
Has anyone encountered the problem of rgamma function in C? The
following simplified program always dies for me, and I wonder if anyone
can tell me the reason.
#include <Rmath.h>
#include <time.h>
#include <Rinternals.h>
SEXP generateGamma ()
{
srand(time(NULL));
return (rgamma(5000,1));
}
Has anyone encountered a similar problem before? Is there another way
2013 Apr 11
1
La_svd compiler error
Dear All,
I have been trying to compile a package for windows that we have written. Since R version 3.0.0 the package doesn't compile any more. (On Linux the package compiles without errors).
The error specifically says:
gcc -m32 -I"C:/PROGRA~1/R/R-30~1.0/include" -DNDEBUG -I"d:/RCompile/CRANpkg/extralibs64/local/include" -O3 -Wall -std=gnu99 -mtune=core2 -c
2012 Nov 09
3
Crash - cause 'memory not mapped'
i'm using the following c++ code
using namespace std;
#include <iostream>
#include <stdio.h>
#include <opencv/cv.h>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv/highgui.h>
#include <opencv/cv.h>
#include <R.h>
#include <Rinternals.h>
#include <Rmath.h>
extern "C" {
SEXP
2010 Jun 18
3
C interface
Greetings,
I am trying to call simple C-code from R.
I am on Windows XP with RTools installed.
The C-function is
#include <R.h>
#include <Rinternals.h>
#include <Rmath.h>
#include <Rdefines.h>
// prevent name mangling
extern "C" {
SEXP __cdecl test(SEXP s){
SEXP result;
PROTECT(result = NEW_NUMERIC(1));
double* ptr=NUMERIC_POINTER(result);
double t =
2009 Jan 27
1
uninitialised value in R (PR#13476)
Hi,
I get an "Conditional jump or move depends on uninitialised value(s)"
from valgrind when using 'solve' in combination with some simple
C-code. (I did not use other functions of R besides 'solve'.)
In detail: running
R --vanilla -d "valgrind --tool=memcheck --memcheck:leak-check=yes
--num-callers=20 "
and calling
.Call("XXX")
nd <- 3
2010 Jun 18
4
C Interface
Greetings,
I am trying to call simple C-code from R.
I am on Windows XP with RTools installed.
The C-function is
#include <R.h>
#include <Rinternals.h>
#include <Rmath.h>
#include <Rdefines.h>
// prevent name mangling
extern "C" {
SEXP __cdecl test(SEXP s){
SEXP result;
PROTECT(result = NEW_NUMERIC(1));
double* ptr=NUMERIC_POINTER(result);
double t =
2006 Jun 29
1
using "rbinom" in C code gives me erroneous results... random variable is not random (always zero)...
Dear Listers,
I am trying to use "rbinom" in my C code, but i always get zeros as output no matter the probability. Am not sure what I am doing wrong because the function has worked before. Attached in an example. Noticed that "rbinom" expects 'n' to be REAL.
Regards, Vumani
R 2.3.1 (2006-06-01)
Windows XP
Gcc
/* Called this file binom.c and then ran rcmd shlib on it
2010 Jun 15
1
Error when callin g C-Code
Hi
when I call the function below in R, i get the error: Object 'pairlist'
can't be converted to 'double'.
#include <R.h>
#include <Rdefines.h>
#include <Rmath.h>
SEXP CSimPoisson(SEXP lambda, SEXP tgrid, SEXP T2M, SEXP Ni, SEXP NT)
{
double sign, EVar;
double *xlambda, *xtgrid, *xT2M, *xNi, *xNT, *xtau;
SEXP tau;
int ltgrid =0;
int i = 0;
int j = 0;
2007 Apr 03
3
Strange number produced by dnorm
Hi All,
I just started to learn compiling C codes for R usage, and got a problem when I was playing with my 'hello world' code.
#include <R.h>
#include <Rdefines.h>
#include <Rmath.h>
SEXP test( ) {
double x;
x=dnorm(1.0,0.0,1.0,1);
printf(" x value is: %d \n",x);
return(R_NilValue);
}
I got the result : x value is: -466460838
Could
2009 Sep 07
1
Usage of OCaml/R binding.
Hello.
I've been pulling together a Debian package out of Maxence Guesdon's
OCaml bindings for R. Will be available from my website as soon as I get
my router to obey me. Here's Maxence's bindings:
http://pauillac.inria.fr/~guesdon/ocaml-r.en.html
The purpose of this software is to access R from OCaml programs.
However, my issue is that after having pulled things to a Debian
2009 Sep 07
1
Usage of OCaml/R binding.
Hello.
I've been pulling together a Debian package out of Maxence Guesdon's
OCaml bindings for R. Will be available from my website as soon as I get
my router to obey me. Here's Maxence's bindings:
http://pauillac.inria.fr/~guesdon/ocaml-r.en.html
The purpose of this software is to access R from OCaml programs.
However, my issue is that after having pulled things to a Debian
2008 Jan 02
1
setting the seed in standalone code using Rlib
Hi,
Is the below -- setSeed -- an okay way to set the seed in standalone
applications making use of Rlib? It seems to work as expected. Is
there a better way to do it? (I'm also looking at do_setseed but am
unsure what to supply as op. findFun("set.seed", R_GlobalEnv)?) Thanks
much.
--
David Faden, dfaden at iastate.edu
AIM: pitulx
--
#include <assert.h>
#include
2016 Jul 01
1
Calling C implementations of rnorm and friends
Well,
For this particular use case why not just transform the parameters at the R
level and then call the existing function? Is there not a closed form
mapping?
~G
On Jul 1, 2016 2:50 PM, "Joshua Ulrich" <josh.m.ulrich at gmail.com> wrote:
> On Fri, Jul 1, 2016 at 6:13 AM, Luis Usier
> <luis.henrique.usier at gmail.com> wrote:
> > Gabriel,
> >
> >
2006 Mar 07
2
double pointer matrix
Hello,
I'm having some difficulty to understand how I could
take the proper result from the following listing:
-- cut ---
#include <stdlib.h>
#include <R.h>
#include <Rmath.h>
void retMat ( double **y, int *n, int *m, double *a,
double *b) {
int i, j;
y = malloc( (*n) * sizeof( double ) );
for (i=0; i<*n; i++) {
y[i] = malloc (
2007 Jul 04
1
Calling C Code from R
Hi R Users,
Thanks in advance.
I am using R-2.5.1 on Windows XP.
I am trying to call C code (testCX1.C) from R. testCX1.c calls another C code (funcC1.c) and returning a value to testCX1.c. I like to have this value in R.
My steps are below:
1. R CMD SHLIB testCX1.c funcC1.c (at command propmt)
2. It creates testCX1.dll with warning (but testCX1.dll works):
2008 Oct 11
1
defines in Rmath.h and R_NO_REMAP
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Hi,
I'm programming with R 2.7.2 and had some trouble including
Rmath.h for its random variates generation routines: Although
I define R_NO_REMAP (which works fine for Rinternals.h stuff),
Rmath.h defines "beta" as "Rf_beta" etc., so that my "beta" strings
get redefined as well! Is this a feature?
I found an old
2007 Jan 04
1
Parameter changes and segfault when calling C code through .Call
I am experiencing some odd behavior with the .Call interface, and I am hoping someone out there can help me with it. Below is a simple example (in that there are R packages that do exactly what I want), but this code illustrates the problem. Thanks in advance for any help you can provide.
Suppose I want to compute the log density of a multivariate normal distribution using C code and the gsl
2011 Aug 04
1
How to seed the R random number generator in C (standalone) with an instance of .Random.seed
hello all,
I use the R standalone math library in my own C program, and the default R
random number generator can be seeded with
set_seed(const unsigned int, const unsigned int).
How could I seed the RNG with an instance of .Random.seed ?
I would need this or a similar workaround for debugging purposes.
More precisely, I use the default R random number generator to sample from
various
2016 Jul 01
2
Calling C implementations of rnorm and friends
Gabriel,
Thanks for that! I guess I really should have figured that one out sooner,
huh?
I understand why that wouldn't be CRAN-compliant. But then, what *is* the
proper way to do it? Is there any way I can call unexported functions from
another package and have it accepted by CRAN?
Also, if I instead re-write the random variable generating functions, do
you have any idea of where the