# RcppEigen v0.3.2.9.0

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## 'Rcpp' Integration for the 'Eigen' Templated Linear Algebra Library

R and 'Eigen' integration using 'Rcpp'. 'Eigen' is a C++ template library for linear algebra: matrices, vectors, numerical solvers and related algorithms. It supports dense and sparse matrices on integer, floating point and complex numbers, decompositions of such matrices, and solutions of linear systems. Its performance on many algorithms is comparable with some of the best implementations based on 'Lapack' and level-3 'BLAS'. The 'RcppEigen' package includes the header files from the 'Eigen' C++ template library (currently version 3.2.9). Thus users do not need to install 'Eigen' itself in order to use 'RcppEigen'. Since version 3.1.1, 'Eigen' is licensed under the Mozilla Public License (version 2); earlier version were licensed under the GNU LGPL version 3 or later. 'RcppEigen' (the 'Rcpp' bindings/bridge to 'Eigen') is licensed under the GNU GPL version 2 or later, as is the rest of 'Rcpp'.

## RcppEigen

### Overview

Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers and related algorithms. It supports dense and sparse matrices on integer, floating point and complex numbers, decompositions of such matrices, and solutions of linear systems. Its performance on many algorithms is comparable with some of the best implementations based on Lapack and level-3 BLAS.

The RcppEigen package includes the header files from the Eigen C++ template library (currently version 3.2.9). Thus users do not need to install Eigen itself in order to use RcppEigen.

### Status

The package is reasonably mature and under active development, following the Eigen release cycle.

### Documentation

The package contains a pdf vignette which is a pre-print of the paper by Bates and Eddelbuettel in JSS (2013, v52i05).

### Authors

Douglas Bates, Dirk Eddelbuettel, Romain Francois, and Yixuan Qiu

GPL (>= 2)

## Functions in RcppEigen

 Name Description RcppEigen.package.skeleton Create a skeleton for a new package that intends to use RcppEigen RcppEigen-package Rcpp/Eigen bridge fastLm Bare-bones linear model fitting function No Results!