rcpp

I've searched for an hour for the methods doing numerical integration. I'm new to Rcpp and rewriting my old programs now. What I have done in R was: x=smpl.x(n,theta.true) joint=function(theta){# the joint dist for #all random variable d=c() for(i in 1:n){ d[i]=den(x[i],theta) } return(prod(d)*dbeta(theta,a,b)) } joint.vec=Vectorize(joint)##vectorize the function, as required when ##using integrate() margin=integrate(joint.vec,0,1)$value # the ##normalizeing constant at the donominator area=integrate(joint.vec,0,theta.true)$value # the values at the ## numeritor The integrate() function in R

I am trying to build an R application in C++ using RInside. I wanted to save the plots as images in specified directory using codes, png(filename = "filename", width = 600, height = 400) xyplot(data ~ year | segment, data = dataset, layout = c(1,3), type = c("l", "p"), ylab = "Y Label", xlab = "X Label", main = "Title of the Plot") dev.off() It creates a png file in the specified directory if directly run from R. But using C++ calls from RInside, I was not able to reproduce the same result. ( I could reproduce all base plots using C++ calls. Problem with only Lattice and ggplots ) I used

The goal is to wrap fairly large existing collection of C++ classes to be callable from R. The first approach is to manually define R Reference Classes and call into "SEXP-wrapped" entry points - and this works fine, no problems. Another approach that I'm currently evaluating is RcppModules. I can successfully use it with toy example within R - with Rcpp::SourceCPP . But have troubles with doing this manually. Example: //---example.cpp #include "Rcpp.h" using namespace Rcpp; class Example { public: Example(){}; SEXP add(SEXP x_, SEXP y_) const { double x = as<double>(x_); double y = as<double>

I have a c++ function called add defined in file add.cpp (content of add.cpp below): #include <Rcpp.h> using namespace Rcpp; // [[Rcpp::export]] double add(double a, double b) { return a + b; } I have another c++ function called multiplyandadd defined in multiplyandadd.cpp file (content of multiplyandadd.cpp below) that calls add function from above: #include <Rcpp.h> using namespace Rcpp; // [[Rcpp::export]] double multiplyandadd(double a, double b, double c) { return c*add(a, b); } In order for this to work I figured out I should create a header file add.h in sub folder /inst/include of my

I am seeking solutions to dynamically updating a list. #include <Rcpp.h> using namespace Rcpp; // [[Rcpp::export]] List Test(){ List L; List L1=List::create(12,45,22,44); L=Language("c",L,L1).eval();//update, add L1's elements on L's back. return L; } The above doesn't work since "List L;" makes L an empty list. However, if I write an additional function: List connectlist(List& a, List& b){ return Language("c",a,b).eval(); } and replace "L=Language("c",L,L1).eval();" with "connectlist(L,L1);", it will work. Can anyone tell me the reason? Or is there any simpler way to dynamically update a list

A month ago I installed Rtools all by default options on my personal computer and was able to write C++ functions in R ever since. Now I am trying to install Rtools on my company's computer and unable to correctly install Rtools. I believe it has something to do with the PATH or some relevant thing that I don't quite understand. Help is so needed. Below are my steps and results: Install R-3.03 in the local drive c; successful install.packages(c("Rcpp","installr")); successful library(installr) install.Rtools() . In this step there's one thing suspicious: I only chose "Save version information