文件名称：Seamless R and C++ Integration
文件大小：1.13MB
文件格式：ZIP
更新时间：2019-10-31 05:14:24
源码,c++
Seamless R and C++ Integration The Rcpp package provides R functions and a C++ library facilitating the integration of R and C++. R data types (SEXP) are matched to C++ objects in a class hierarchy. All R types are supported (vectors, functions, environment, etc ...) and each type is mapped to a dedicated class. For example, numeric vectors are represented as instances of the Rcpp::NumericVector class, environments are represented as instances of Rcpp::Environment, functions are represented as Rcpp::Function, etc ... The Rcpp-introduction vignette (also published as a JSS paper) provides a good entry point to Rcpp as do the Rcpp website, the Rcpp page and the Rcpp Gallery. Full documentation is provided by the Rcpp book. Conversion from C++ to R and back is driven by the templates Rcpp::wrap and Rcpp::as which are highly flexible and extensible, as documented in the Rcpp-extending vignette. Rcpp also provides Rcpp modules, a framework that allows exposing C++ functions and classes to the R level. The Rcpp-modules vignette details the current set of features of Rcpp-modules. Rcpp includes a concept called Rcpp sugar that brings many R functions into C++. Sugar takes advantage of lazy evaluation and expression templates to achieve great performance while exposing a syntax that is much nicer to use than the equivalent low-level loop code. The Rcpp-sugar gives an overview of the feature. Rcpp attributes provide a high-level syntax for declaring C++ functions as callable from R and automatically generating the code required to invoke them. Attributes are intended to facilitate both interactive use of C++ within R sessions as well as to support R package development. Attributes are built on top of Rcpp modules and their implementation is based on previous work in the inline package. See the Rcpp-atttributes vignettes for more details. Documentation The package ships with nine pdf vignettes. Additional documentation is available via the JSS paper by Eddelbuettel and Francois (2011, JSS) paper (corresponding to the 'intro' vignette) and the book by Eddelbuettel (2013, Springer); see 'citation("Rcpp")' for details. Examples The Rcpp Gallery showcases over one hundred fully documented and working examples. A number of examples are included as are over 1160 unit tests in over 550 unit test functions provide additional usage examples. An earlier version of Rcpp, containing what we now call the 'classic Rcpp API' was written during 2005 and 2006 by Dominick Samperi. This code has been factored out of Rcpp into the package RcppClassic, and it is still available for code relying on the older interface. New development should always use this Rcpp package instead. Other usage examples are provided by packages using Rcpp. As of September 2016, there are 759 CRAN packages using Rcpp, a further 76 BioConductor packages in its current release (with 84 in its devel version) as well as an unknown number of GitHub, Bitbucket, R-Forge, ... repositories using Rcpp. All these packages provide usage examples for Rcpp. Installation Released and tested versions of Rcpp are available via the CRAN network, and can be installed from within R via install.packages("Rcpp") To install from source, ensure you have a complete package development environment for R as discussed in the relevant documentation; also see questions 1.2 and 1.3 in the Rcpp-FAQ. Authors Dirk Eddelbuettel, Romain Francois, JJ Allaire, Kevin Ushey, Qiang Kou, Doug Bates, and John Chambers License GPL (>= 2)