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Questions tagged [rcpp11]

Rcpp11 is an R package shipping a C++11 library facilitating integration between R and C++.

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Rcpp::abs defaults to int instead of double?

Source the following cpp file in RStudio and you see that Rcpp::abs is returning an integer when I was hoping for a double. std::abs solves the issue. I assume my expectation is wrong, but why is that? Why should it return an integer here (granted,…
jks612
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Return a dataset using Rcpp function

I am using a truely wonderfull package Rcpp to pass my C++ function dataset(name) which generates synthetic datasets to R. One of the datasets constant_file is not generated/sampled, but is contained in an .Rdata file. Is it possible to return it…
qarabala
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Rcpp override summary method for custom class

Suppose I have the following function: List foo(List x) { x.attr("class") = "myOwnClass"; return(x); } I whant to override R summary method for foo function output. However the following R-style approach does not work: List…
Bogdan
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Rcpp formula input argument

I want to create Rcpp function which input value is R formula. When I use String as an input for a function I get error in R when I writing formula in not string format (if I provide formula like a string in R then all works right). Please provide…
Bogdan
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R package build error: '-std=c++11 or -std=gnu++11 compiler options'

I am trying to build an R package which includes Rcpp and RcppArmadillo code. sourceCpp() works fine and everything runs smoothly, but when I try to build the package I get: "This file requires compiler and library support for the ISO C++ 2011…
Seth
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Fast element-wise access in Eigen::SparseMatrix in Latent Dirichlet Allocation

I am implementing Latent Dirichlet Allocation (LDA) in Rcpp. In LDA, we need to deal with a huge sparse matrix (e.g. 50 x 3000). I decided to use SparseMatrix in Eigen. However, since I need access to each cell, computationally expensive .coeffRef…
user51966
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Using pre-assigned value from R outside of cppFunction

I am wondering if there is an easy way to call the pre-assigned values in r when I wrote cppFunction. Here is my code: y=45.3 library(Rcpp) cppFunction( "NumericVector demo_fun_cpp(double x) { NumericVector out1(50); out1[0] = 2; for…
Joanna
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Automatic generation of Makevars and configure files

Friends, Is there automatic way to generate Makevars and configure? I'm compiling my C++ code using the bash terminal with the g++ compiler. Example: I have the following code written using the Rcpp.h library where I use a gsl/gsl_sf_bessel.h…
Pedro Rafael
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Multi-armed bandits with Rcpp

I am translating the epsilon-greedy algorithm for multiarmed bandits from here. This is a rather nice demonstration of the power and elegance of Rcpp. However, the results from this version do not tally with the one that is mentioned in the link…
buzaku
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Rcpp - Exposing a C++ function that contains pointers to R

I am using Rcpp to create a package in R that leverages C++ code. I have read all of the Rcpp vignettes, but I haven't been able to find a solution to the following problem. One of the C++ classes I'm trying to use contains a pointer. I am exposing…
ndroz
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Find number of days between two given dates in Rcpp

I'm newbie in Rcpp, but I have a task which's connected with Date and Datetime. Let me have market data in DataFrame in my Rcpp function. So, Date field has formatting like this: 2016-04-19 00:01:00 Dataframe field name which contains Date values…
Dmitriy
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My Rcpp code delays to show printed message

I have a Rcpp code inside of which I have a message to be printed out as: "The no. of iteration is ---" after each 100 iteration. For this I used the code: Rcout << "The number of iteration is : " << t << "\n"; The problem with this code is that…
gultu
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Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]) : there is no package called ‘Rcpp’

Basically I want to use wordcloud function. I'm working through R console. But I could use Rstudio if thats the problem. When I use wordcloud(r_stats_text_corpus) Error: could not find function "wordcloud" I also tried library("wordcloud") Error…
tikiabbas
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Rcpp C++11 .Call issues under Windows

I'm experiencing .Call issues when running functions built with Rcpp on Windows, if my c++ code uses C++11 std::regex and I have found no way out so far. Unlike prior questions on similar issues, I have had neither building nor linking issues.…
Fab
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RCpp Temporary Build Location

I work in an environment where linking of dynamic libraries are restricted to certain locations. When I use RStudio and request a new C++ file I get the "Hello World" template. When I try to compile that and link that in by clicking on "Source" in…
Justace Clutter
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