1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// as_vector.h: Rcpp R/C++ interface class library -- as_vector( sugar matrix expression )
//
// Copyright (C) 2010 - 2014 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__sugar__matrix_as_vector_h
#define Rcpp__sugar__matrix_as_vector_h
namespace Rcpp{
namespace internal{
template <int RTYPE, bool NA, typename T>
inline Rcpp::Vector<RTYPE>
as_vector__impl( MatrixBase<RTYPE,NA,T>& t, Rcpp::traits::false_type ){
T& ref = t.get_ref() ;
int nc = ref.ncol(), nr = ref.nrow() ;
Vector<RTYPE> out (static_cast<R_xlen_t>(nr) * nc) ;
R_xlen_t k =0;
for( int col_index=0; col_index<nc; col_index++)
for( int row_index=0; row_index<nr; row_index++, k++)
out[k] = ref( row_index, col_index ) ;
return out ;
}
template <int RTYPE, bool NA, typename T>
inline Rcpp::Vector<RTYPE>
as_vector__impl( MatrixBase<RTYPE,NA,T>& t, Rcpp::traits::true_type ){
Matrix<RTYPE>& ref = t.get_ref() ;
R_xlen_t size = static_cast<R_xlen_t>(ref.ncol())*ref.nrow() ;
typename Rcpp::Vector<RTYPE>::const_iterator first(static_cast<const Rcpp::Vector<RTYPE>&>(ref).begin()) ;
return Vector<RTYPE>(first, first+size );
}
} // internal
template <int RTYPE, bool NA, typename T>
inline Rcpp::Vector<RTYPE>
as_vector( const MatrixBase<RTYPE,NA,T>& t ){
return internal::as_vector__impl( const_cast< MatrixBase<RTYPE,NA,T>& >(t), typename Rcpp::traits::same_type< T , Matrix<RTYPE> >() ) ;
}
} // Rcpp
#endif
|
