similar to: FW: [Rcpp-devel] Question on 5.6 Interfacing C++ code

In the "Writing R Extensions" manual appears this example, to get access to C++ function using the R commands: R> dyn.load(paste("X", .Platform$dynlib.ext, sep = "")) constructor Y R> .C("X_main") constructor X destructor X list() That gives me access to the function "X_main", but how to get access to methods and properties

Hi, I have written a small C++ function and compile it. However in R I can't see the function I have defined in C++. I have read some web-pages about Rcpp and C++ but it is a bit confusion for me. Anyway, This is the C++-code: #include <Rcpp.h> using namespace Rcpp; // [[Rcpp::export]] List compute_values_cpp(int totalPoints = 1e5, double angle_increment = 0.01, int radius =

.Call("compute_values_cpp") Also, if you were passing arguments to the C++ function you would need to declare the function differently. Do a search on "Rcpp calling C++ functions from R" HTH, Eric On Sun, Dec 3, 2017 at 3:06 AM, Martin M?ller Skarbiniks Pedersen < traxplayer at gmail.com> wrote: > Hi, > > I have written a small C++ function and compile it.

Good question Rolf. Rui, thanks for pointing out dyn.unload. When I started using Rcpp a couple of years ago I got burned by stale .so enough times that I adopted a policy of recompile-then-start new R session. My workflow does not include Rolf's "brazillion" repeats, so the overhead of this approach has not been too painful. The documentation for dyn.unload (via ?dyn.unload)

Hi, everyone, I am just trying to use Rcpp in my computer, and I would like to try a simple example from website, but R keeps reporting me error. I am using Windows XP, and has installed Rtools and GSI. Here is the response: > src = ' + Rcpp::NumericVector xa(a); + Rcpp::NumericVector xb(b); + int n_xa = xa.size(); + int n_xb = xb.size(); + + Rcpp::NumericVector xab(n_xa + n_xb - 1);

Martin, You are making your life way too complicated. There are a number of things I would do differently: 0) Wrong list. Rcpp has its down, rcpp-devel, and I basically do not read this and would have missed this were it not for luck. On 3 December 2017 at 02:06, Martin M?ller Skarbiniks Pedersen wrote: | I have read some web-pages about Rcpp and C++ but it is a bit confusion | for me. 1)

Hi folks, My system is Windows98 + R1.9.0. The path for my system is c:\perl\bin; c:\mingw\bin; c:\rtools; c:\windows; c:\windows\command; c:\rw1090\bin. I created three files followed the examples in “Writing R extensions” in the directory c:\temp: // X.hh class X { public: X (); ~X (); }; class Y { public: Y (); ~Y (); }; // X.cc #include <iostream> #include "X.hh" static

Hi all, I'm not sure if I'm not supposed to do the following (the dyn.unload part, I mean) or this could be a bug (in R or Rcpp): ``` Rcpp::sourceCpp(code=' #include <Rcpp.h> class Object {}; //[[Rcpp::export]] SEXP new_object() { return Rcpp::XPtr<Object>(new Object()); }' ) new_object() dyn.unload(list.files(tempdir(), ".(so|dll)$",

Dear all, my apologies for posting here instead of rcpp-devel (registration for which did not seem to work). I try to use a Rcpp module outside a package using the following code which should work according to posts on this list/rcpp-devel. library('Rcpp'); dlr = dyn.load('build/libtestlib.so'); mod = Module('testclass', PACKAGE = dlr); cl = new(mod$testclass); This

On 3 December 2017 at 05:23, Eric Berger <ericjberger at gmail.com> wrote: > > Do a search on "Rcpp calling C++ functions from R" > Thanks. However search for "Rcpp calling C++ functions from R" gives a lot of result but I think some of them are outdated and others don't agree with each other. Can you point to a specific good on-line guide for me? Regards

Hi, I followed the example in "Writing R Extensions" to create a shared object in Windows, using the command R CMD SHLIB X.cc X_main.cc This was encountered: ../src/gnuwin32/MkRules:155: warning: overriding commands for target '.c.d' ../src/gnuwin32/MkRules:143: warning: ignoring old commands for target '.c.d' ../src/gnuwin32/MkRules:171: warning: overriding commands

Hello My colleagues asked me to install "R" with module "shiny". R version 3.0.1 compiled fine on Solaris 10 and is running well. I tried to install "shiny". With the dependencies "Rcpp" should be installed before. But the compile step did fail. See below. The initial error message is "Error in dyn.load(file, DLLpath = DLLpath, ...) :" Before

Hi, Im not sure if this is the right place to post this. I am using Xubuntu Karmic Koala and am trying to use the Rcpp package. I am testing it using a simple code that takes in a vector and adds 1 to each element: #include <Rcpp.h> // This file takes in a vector and adds one to each entry RcppExport SEXP addone(SEXP vec){ // create a local copy of vec Rcpp::NumericVector

Hello My colleagues asked me to install "R" with module "shiny". R version 3.0.1 compiled fine on Solaris 10 and is running well. I tried to install "shiny". With the dependencies "Rcpp" should be installed before. But the compile step did fail. See below. The initial error message is "Error in dyn.load(file, DLLpath = DLLpath, ...) :"

On 3 December 2017 at 20:19, Dirk Eddelbuettel <edd at debian.org> wrote: Hi Dirk, Thanks for your answers. I got a few more questions. > > 0) Wrong list. Rcpp has its down, rcpp-devel, and I basically do not read > this and would have missed this were it not for luck. OK. I did found the rcpp-devel mailing-list. But I though it was a developers of the rcpp-package. So it is ok

I would go to the source, in this case Dirk Eddelbuettel's (I hope I spelled it correctly) documentation for Rcpp: http://dirk.eddelbuettel.com/code/rcpp/Rcpp-attributes.pdf Note that you need to do sourceCpp("logistic_map.cpp") in R instead of building and dyn.load()-ing the object. HTH, Peter On Sun, Dec 3, 2017 at 11:04 AM, Martin M?ller Skarbiniks Pedersen <traxplayer

Hi, I am Linux Ubuntu 9.04 user. I'm using R-2.6. Actually, I am developing R package for reading/writing 3D images. I needed to use the R package Rcpp in order to make profit of available C/C++ codes. My problem is that my C code is not able to include the Rcpp.h In fact, when I run this command R CMD build rply, I got the following error message in the file

Hi, I am trying to set up a C++ library for my R code. I followed the R-extension manual but found out that the example of "X.cpp, X_main.cpp" is somewhat too simple. Here is my code: //lib4R.h testing for interfacing C++ with R -- using C++ library in R #include <iostream> using namespace std; class lib4R { public: lib4R(); ~lib4R(); int

In the following code routine 'initaquaphy' is defined in Fortran, and dynamically loaded into R.: test.f: subroutine initaquaphy(odeparms) external odeparms double precision pars(19) common /myparms/pars call odeparms(19, pars) return end $ R CMD SHLIB Aquaphy.f gfortran -fpic -g -O2 -c test.f -o test.o gcc -std=gnu99 -shared

I am trying to get a dll compiled for use with dyn.load. I use R.1.7.1 under Windows. I have tried the following trivial example based on the "Writing R extensions" manual. rtest.h -------- class X { public: X (); ~X (); void Give7(double*); }; class Y { public: Y (); ~Y (); }; rtest.cpp --------- #include <iostream.h> #include "rtest.h" static Y y;