Rcpp.h,RcppArmadillo.hなど基礎

• ""はここにあるように、RcppArmadilloでRの乱択ができるように書かれたhファイルだが、その中で#include しているので、RcppArmadillo.hのいろいろも使えている(ここも参考)
  • C:\Users\hogeUserName\Documents\R\win-library\3.0\RcppArmadillo\include\RcppArmadilloExtensions にインストールされていた。
• 似たようなところにある"RcppArmadillo.h"は以下のように"Rcpp.h"をincludeしていて、バッティングしないように警告がある

// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// RcppArmadillo.h: Rcpp/Armadillo glue
//
// Copyright (C)  2010 - 2012  Dirk Eddelbuettel, Romain Francois and Douglas Bates
//
// This file is part of RcppArmadillo.
//
// RcppArmadillo is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// RcppArmadillo is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with RcppArmadillo.  If not, see <http://www.gnu.org/licenses/>.

#ifndef RcppArmadillo__RcppArmadillo__h
#define RcppArmadillo__RcppArmadillo__h

#ifdef Rcpp_hpp
    #error "The file 'Rcpp.h' should not be included. Please correct to include only 'RcppArmadillo.h'."
#endif

#include <RcppArmadilloForward.h>
#include <Rcpp.h>
#include <RcppArmadilloWrap.h>
#include <RcppArmadilloSugar.h>

#endif

• さらにそのRcpp.hは以下のようにいろいろ用意してくれているので、いろいろできる(数学計算なんかもできる)

// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
//
// Rcpp.h: R/C++ interface class library
//
// Copyright (C) 2008 - 2009 Dirk Eddelbuettel
// Copyright (C) 2009 - 2012 Dirk Eddelbuettel and Romain Francois
//
// This file is part of Rcpp.
//
// Rcpp is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// Rcpp is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Rcpp.  If not, see <http://www.gnu.org/licenses/>.

#ifndef Rcpp_hpp
#define Rcpp_hpp

/* it is important that this comes first */
#include <RcppCommon.h>

/* new api */
#include <Rcpp/exceptions.h>

#include <Rcpp/RObject.h>

#include <Rcpp/Promise.h>
#include <Rcpp/S4.h>
#include <Rcpp/Reference.h>
#include <Rcpp/clone.h>
#include <Rcpp/grow.h>
#include <Rcpp/Dimension.h>
#include <Rcpp/Environment.h>
#include <Rcpp/Evaluator.h>

#include <Rcpp/Vector.h>
#include <Rcpp/sugar/nona/nona.h>
#include <Rcpp/Fast.h>
#include <Rcpp/Extractor.h>

#include <Rcpp/XPtr.h>
#include <Rcpp/Symbol.h>
#include <Rcpp/Language.h>
#include <Rcpp/DottedPair.h>
#include <Rcpp/Pairlist.h>
#include <Rcpp/Function.h>
#include <Rcpp/WeakReference.h>
#include <Rcpp/StringTransformer.h>
#include <Rcpp/Formula.h>
#include <Rcpp/DataFrame.h>
#include <Rcpp/Date.h>
#include <Rcpp/DateVector.h>
#include <Rcpp/Datetime.h>
#include <Rcpp/DatetimeVector.h>

#include <Rcpp/Module.h>
#include <Rcpp/InternalFunction.h>

#include <Rmath.h>
#include <Rcpp/sugar/undoRmath.h>

#ifndef RCPP_NO_SUGAR
#include <Rcpp/sugar/sugar.h>
#include <Rcpp/stats/stats.h>
#endif

// wrappers for R API 'scalar' functions
#include <Rcpp/Rmath.h>

// this stays at the very end, because it needs to 
// 'see' all versions of wrap
#include <Rcpp/internal/wrap_end.h>

#include <Rcpp/api/meat/meat.h>

#endif

#include <RcppArmadilloExtensions/sample.h>
// [[Rcpp::depends(RcppArmadillo)]]

using namespace Rcpp ;

// [[Rcpp::export]]

IntegerVector factorial_int(int n) {
	IntegerVector x(n);
	x[0] = 1;
	for(int i=1;i<n;++i){
		x[i] = x[i-1]*(i+1);
	}
	return x;
}