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Eigen
3.2.5
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00001 // This file is part of Eigen, a lightweight C++ template library 00002 // for linear algebra. 00003 // 00004 // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr> 00005 // 00006 // This Source Code Form is subject to the terms of the Mozilla 00007 // Public License v. 2.0. If a copy of the MPL was not distributed 00008 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. 00009 00010 #ifndef EIGEN_SPARSEREDUX_H 00011 #define EIGEN_SPARSEREDUX_H 00012 00013 namespace Eigen { 00014 00015 template<typename Derived> 00016 typename internal::traits<Derived>::Scalar 00017 SparseMatrixBase<Derived>::sum() const 00018 { 00019 eigen_assert(rows()>0 && cols()>0 && "you are using a non initialized matrix"); 00020 Scalar res(0); 00021 for (Index j=0; j<outerSize(); ++j) 00022 for (typename Derived::InnerIterator iter(derived(),j); iter; ++iter) 00023 res += iter.value(); 00024 return res; 00025 } 00026 00027 template<typename _Scalar, int _Options, typename _Index> 00028 typename internal::traits<SparseMatrix<_Scalar,_Options,_Index> >::Scalar 00029 SparseMatrix<_Scalar,_Options,_Index>::sum() const 00030 { 00031 eigen_assert(rows()>0 && cols()>0 && "you are using a non initialized matrix"); 00032 return Matrix<Scalar,1,Dynamic>::Map(&m_data.value(0), m_data.size()).sum(); 00033 } 00034 00035 template<typename _Scalar, int _Options, typename _Index> 00036 typename internal::traits<SparseVector<_Scalar,_Options, _Index> >::Scalar 00037 SparseVector<_Scalar,_Options,_Index>::sum() const 00038 { 00039 eigen_assert(rows()>0 && cols()>0 && "you are using a non initialized matrix"); 00040 return Matrix<Scalar,1,Dynamic>::Map(&m_data.value(0), m_data.size()).sum(); 00041 } 00042 00043 } // end namespace Eigen 00044 00045 #endif // EIGEN_SPARSEREDUX_H