diff options
Diffstat (limited to 'extern/Eigen2/Eigen/src/Sparse/SparseRedux.h')
-rw-r--r-- | extern/Eigen2/Eigen/src/Sparse/SparseRedux.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/extern/Eigen2/Eigen/src/Sparse/SparseRedux.h b/extern/Eigen2/Eigen/src/Sparse/SparseRedux.h new file mode 100644 index 00000000000..f0d3705488e --- /dev/null +++ b/extern/Eigen2/Eigen/src/Sparse/SparseRedux.h @@ -0,0 +1,40 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. Eigen itself is part of the KDE project. +// +// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr> +// +// Eigen is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 3 of the License, or (at your option) any later version. +// +// Alternatively, 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. +// +// Eigen 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 Lesser General Public License or the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License and a copy of the GNU General Public License along with +// Eigen. If not, see <http://www.gnu.org/licenses/>. + +#ifndef EIGEN_SPARSEREDUX_H +#define EIGEN_SPARSEREDUX_H + +template<typename Derived> +typename ei_traits<Derived>::Scalar +SparseMatrixBase<Derived>::sum() const +{ + ei_assert(rows()>0 && cols()>0 && "you are using a non initialized matrix"); + Scalar res = 0; + for (int j=0; j<outerSize(); ++j) + for (typename Derived::InnerIterator iter(derived(),j); iter; ++iter) + res += iter.value(); + return res; +} + +#endif // EIGEN_SPARSEREDUX_H |