1// This file is part of Eigen, a lightweight C++ template library
2// for linear algebra.
3//
4// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
5//
6// This Source Code Form is subject to the terms of the Mozilla
7// Public License v. 2.0. If a copy of the MPL was not distributed
8// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9
10#ifndef EIGEN_SPARSEREDUX_H
11#define EIGEN_SPARSEREDUX_H
12
13namespace Eigen {
14
15template<typename Derived>
16typename internal::traits<Derived>::Scalar
17SparseMatrixBase<Derived>::sum() const
18{
19  eigen_assert(rows()>0 && cols()>0 && "you are using a non initialized matrix");
20  Scalar res(0);
21  for (Index j=0; j<outerSize(); ++j)
22    for (typename Derived::InnerIterator iter(derived(),j); iter; ++iter)
23      res += iter.value();
24  return res;
25}
26
27template<typename _Scalar, int _Options, typename _Index>
28typename internal::traits<SparseMatrix<_Scalar,_Options,_Index> >::Scalar
29SparseMatrix<_Scalar,_Options,_Index>::sum() const
30{
31  eigen_assert(rows()>0 && cols()>0 && "you are using a non initialized matrix");
32  return Matrix<Scalar,1,Dynamic>::Map(&m_data.value(0), m_data.size()).sum();
33}
34
35template<typename _Scalar, int _Options, typename _Index>
36typename internal::traits<SparseVector<_Scalar,_Options, _Index> >::Scalar
37SparseVector<_Scalar,_Options,_Index>::sum() const
38{
39  eigen_assert(rows()>0 && cols()>0 && "you are using a non initialized matrix");
40  return Matrix<Scalar,1,Dynamic>::Map(&m_data.value(0), m_data.size()).sum();
41}
42
43} // end namespace Eigen
44
45#endif // EIGEN_SPARSEREDUX_H
46