[Rcpp-devel] using RApi inC/C++

[Dirk Eddelbuettel]

On 21 March 2011 at 00:59, nandan amar wrote:
| I was searching for SVN source link for rinside
| I could only get tar.gz from
| http://cran.r-project.org/web/packages/RInside/index.html
| I placed the code as u did , but i got following error
| 
| amar at amar:~/opt/RInside/inst/examples/standard$ make
| R was not built as a library
| R was not built as a library
| g++  -I/usr/local/lib/R/site-library/Rcpp/include
| -I"/usr/local/lib/R/site-library/RInside/include" -g -O2 -Wall
| -I/usr/local/include   amar.cpp    -L/usr/local/lib/R/lib -lRblas
| -L/usr/local/lib/R/lib -lRlapack
| -L/usr/local/lib/R/site-library/Rcpp/lib -lRcpp
| -Wl,-rpath,/usr/local/lib/R/site-library/Rcpp/lib
| -L/usr/local/lib/R/site-library/RInside/lib -lRInside
| -Wl,-rpath,/usr/local/lib/R/site-library/RInside/lib -o amar
| amar.cpp:1: fatal error: R.h: No such file or directory
| compilation terminated.
| make: *** [amar] Error 1
| 
| "R was not built as a library".....  I compiled and installed R-2.12.2
| as given in INSTALL
| where am I going wrong.
| Pls suggest

There are a couple of manuals that come with R which explain in great detail
how to install R (as the error "R was not built as a library" is indicative
of you not using a built where R is configured to be a shared library) and
moreover R.h is not found --- but we cannot tell what you did wrong from the
information you supplied.

Somehow your system is non-standard and you will have to change that.

Hope this helps, Dirk

| regards.
| 
| 
| On 18 March 2011 20:09, Dirk Eddelbuettel <edd at debian.org> wrote:
| >
| > On 18 March 2011 at 19:39, nandan amar wrote:
| > | Dear All,
| > | I am trying to use Some R api in c code.
| > | To start with I copied following code and try to run as
| > |
| > |
| > | a:~/Desktop/rcpp$ g++ file.cpp
| > |
| > | i got following error
| > |
| > | r.cpp:1: fatal error: R.h: No such file or directory
| > | compilation terminated.
| > |
| > | How should I compile the code.
| >
| > Please look at the Makefile in the examples/standard/ directory of RInside.
| >
| > I just dropped your code as file 'amar.cpp' and said 'make'. Here is what
| > happens:
| >
| > edd at max:~/svn/rinside/pkg/inst/examples/standard$ make
| > g++ -I/usr/share/R/include -I/usr/local/lib/R/site-library/Rcpp/include -I"/usr/local/lib/R/site-library/RInside/include" -O3 -pipe -g -Wall    amar.cpp  -L/usr/lib64/R/lib -lR  -lblas -llapack -L/usr/local/lib/R/site-library/Rcpp/lib -lRcpp -Wl,-rpath,/usr/local/lib/R/site-library/Rcpp/lib -L/usr/local/lib/R/site-library/RInside/lib -lRInside -Wl,-rpath,/usr/local/lib/R/site-library/RInside/lib -o amar
| >
| > after which I can just say
| >
| > edd at max:~/svn/rinside/pkg/inst/examples/standard$ ./amar
| >
| > and the plot appears.  You don't need the unlink(), R does that for you
| > (which is why we use its tempfile() functions).
| >
| > Dirk
| >
| >
| > | file.cpp
| > | _____________________________________________________________
| > | #include <R.h>
| > | //#include <Rinternals.h>
| > | #include <RInside.h>                    // for the embedded R via RInside
| > |  using namespace std;
| > | int main(int argc, char *argv[]) {
| > |
| > |    // create an embedded R instance
| > |    RInside R(argc, argv);
| > |
| > |    // evaluate an R expression with curve()
| > |    // because RInside defaults to interactive=false we use a file
| > |    std::string cmd = "tmpf <- tempfile('curve'); "
| > |                      "png(tmpf); "
| > |                      "curve(x^2, -10, 10, 200); "
| > |                      "dev.off();"
| > |                      "tmpf";
| > |    // by running parseEval, we get the last assignment back, here the filename
| > |    std::string tmpfile = R.parseEval(cmd);
| > |
| > |    std::cout << "Could now use plot in " << tmpfile << std::endl;
| > |    unlink(tmpfile.c_str());            // cleaning up
| > |
| > |    // alternatively, by forcing a display we can plot to screen
| > |    cmd = "x11(); curve(x^2, -10, 10, 200); Sys.sleep(30);";
| > |    // parseEvalQ evluates without assignment
| > |    R.parseEvalQ(cmd);
| > |
| > |    exit(0);
| > | }
| > |
| > | --
| > | Amar Kumar Nandan
| > | _______________________________________________
| > | Rcpp-devel mailing list
| > | Rcpp-devel at lists.r-forge.r-project.org
| > | https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
| >
| > --
| > Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com
| >
| 
| 
| 
| --
| Amar Kumar Nandan
| Karnataka, India, 560100
| http://aknandan.co.nr
| 

-- 
Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com