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 (at) 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 13 namespace Eigen { 14 15 template<typename Derived> 16 typename internal::traits<Derived>::Scalar 17 SparseMatrixBase<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 27 template<typename _Scalar, int _Options, typename _Index> 28 typename internal::traits<SparseMatrix<_Scalar,_Options,_Index> >::Scalar 29 SparseMatrix<_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 35 template<typename _Scalar, int _Options, typename _Index> 36 typename internal::traits<SparseVector<_Scalar,_Options, _Index> >::Scalar 37 SparseVector<_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
