| 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_SPARSE_DOT_H |
|---|
| 11 | #define EIGEN_SPARSE_DOT_H |
|---|
| 12 | |
|---|
| 13 | namespace Eigen { |
|---|
| 14 | |
|---|
| 15 | template<typename Derived> |
|---|
| 16 | template<typename OtherDerived> |
|---|
| 17 | typename internal::traits<Derived>::Scalar |
|---|
| 18 | SparseMatrixBase<Derived>::dot(const MatrixBase<OtherDerived>& other) const |
|---|
| 19 | { |
|---|
| 20 | EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived) |
|---|
| 21 | EIGEN_STATIC_ASSERT_VECTOR_ONLY(OtherDerived) |
|---|
| 22 | EIGEN_STATIC_ASSERT_SAME_VECTOR_SIZE(Derived,OtherDerived) |
|---|
| 23 | EIGEN_STATIC_ASSERT((internal::is_same<Scalar, typename OtherDerived::Scalar>::value), |
|---|
| 24 | YOU_MIXED_DIFFERENT_NUMERIC_TYPES__YOU_NEED_TO_USE_THE_CAST_METHOD_OF_MATRIXBASE_TO_CAST_NUMERIC_TYPES_EXPLICITLY) |
|---|
| 25 | |
|---|
| 26 | eigen_assert(size() == other.size()); |
|---|
| 27 | eigen_assert(other.size()>0 && "you are using a non initialized vector"); |
|---|
| 28 | |
|---|
| 29 | typename Derived::InnerIterator i(derived(),0); |
|---|
| 30 | Scalar res(0); |
|---|
| 31 | while (i) |
|---|
| 32 | { |
|---|
| 33 | res += internal::conj(i.value()) * other.coeff(i.index()); |
|---|
| 34 | ++i; |
|---|
| 35 | } |
|---|
| 36 | return res; |
|---|
| 37 | } |
|---|
| 38 | |
|---|
| 39 | template<typename Derived> |
|---|
| 40 | template<typename OtherDerived> |
|---|
| 41 | typename internal::traits<Derived>::Scalar |
|---|
| 42 | SparseMatrixBase<Derived>::dot(const SparseMatrixBase<OtherDerived>& other) const |
|---|
| 43 | { |
|---|
| 44 | EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived) |
|---|
| 45 | EIGEN_STATIC_ASSERT_VECTOR_ONLY(OtherDerived) |
|---|
| 46 | EIGEN_STATIC_ASSERT_SAME_VECTOR_SIZE(Derived,OtherDerived) |
|---|
| 47 | EIGEN_STATIC_ASSERT((internal::is_same<Scalar, typename OtherDerived::Scalar>::value), |
|---|
| 48 | YOU_MIXED_DIFFERENT_NUMERIC_TYPES__YOU_NEED_TO_USE_THE_CAST_METHOD_OF_MATRIXBASE_TO_CAST_NUMERIC_TYPES_EXPLICITLY) |
|---|
| 49 | |
|---|
| 50 | eigen_assert(size() == other.size()); |
|---|
| 51 | |
|---|
| 52 | typedef typename Derived::Nested Nested; |
|---|
| 53 | typedef typename OtherDerived::Nested OtherNested; |
|---|
| 54 | typedef typename internal::remove_all<Nested>::type NestedCleaned; |
|---|
| 55 | typedef typename internal::remove_all<OtherNested>::type OtherNestedCleaned; |
|---|
| 56 | |
|---|
| 57 | const Nested nthis(derived()); |
|---|
| 58 | const OtherNested nother(other.derived()); |
|---|
| 59 | |
|---|
| 60 | typename NestedCleaned::InnerIterator i(nthis,0); |
|---|
| 61 | typename OtherNestedCleaned::InnerIterator j(nother,0); |
|---|
| 62 | Scalar res(0); |
|---|
| 63 | while (i && j) |
|---|
| 64 | { |
|---|
| 65 | if (i.index()==j.index()) |
|---|
| 66 | { |
|---|
| 67 | res += internal::conj(i.value()) * j.value(); |
|---|
| 68 | ++i; ++j; |
|---|
| 69 | } |
|---|
| 70 | else if (i.index()<j.index()) |
|---|
| 71 | ++i; |
|---|
| 72 | else |
|---|
| 73 | ++j; |
|---|
| 74 | } |
|---|
| 75 | return res; |
|---|
| 76 | } |
|---|
| 77 | |
|---|
| 78 | template<typename Derived> |
|---|
| 79 | inline typename NumTraits<typename internal::traits<Derived>::Scalar>::Real |
|---|
| 80 | SparseMatrixBase<Derived>::squaredNorm() const |
|---|
| 81 | { |
|---|
| 82 | return internal::real((*this).cwiseAbs2().sum()); |
|---|
| 83 | } |
|---|
| 84 | |
|---|
| 85 | template<typename Derived> |
|---|
| 86 | inline typename NumTraits<typename internal::traits<Derived>::Scalar>::Real |
|---|
| 87 | SparseMatrixBase<Derived>::norm() const |
|---|
| 88 | { |
|---|
| 89 | return internal::sqrt(squaredNorm()); |
|---|
| 90 | } |
|---|
| 91 | |
|---|
| 92 | } // end namespace Eigen |
|---|
| 93 | |
|---|
| 94 | #endif // EIGEN_SPARSE_DOT_H |
|---|
