mirror of
https://gitlab.com/libeigen/eigen.git
synced 2025-05-14 00:38:10 +08:00
102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
|
|
// for linear algebra.
|
|
//
|
|
// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla
|
|
// Public License v. 2.0. If a copy of the MPL was not distributed
|
|
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
#ifndef EIGEN_SPARSE_DOT_H
|
|
#define EIGEN_SPARSE_DOT_H
|
|
|
|
namespace Eigen {
|
|
|
|
template<typename Derived>
|
|
template<typename OtherDerived>
|
|
typename internal::traits<Derived>::Scalar
|
|
SparseMatrixBase<Derived>::dot(const MatrixBase<OtherDerived>& other) const
|
|
{
|
|
EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived)
|
|
EIGEN_STATIC_ASSERT_VECTOR_ONLY(OtherDerived)
|
|
EIGEN_STATIC_ASSERT_SAME_VECTOR_SIZE(Derived,OtherDerived)
|
|
EIGEN_STATIC_ASSERT((internal::is_same<Scalar, typename OtherDerived::Scalar>::value),
|
|
YOU_MIXED_DIFFERENT_NUMERIC_TYPES__YOU_NEED_TO_USE_THE_CAST_METHOD_OF_MATRIXBASE_TO_CAST_NUMERIC_TYPES_EXPLICITLY)
|
|
|
|
eigen_assert(size() == other.size());
|
|
eigen_assert(other.size()>0 && "you are using a non initialized vector");
|
|
|
|
typename Derived::InnerIterator i(derived(),0);
|
|
Scalar res(0);
|
|
while (i)
|
|
{
|
|
res += numext::conj(i.value()) * other.coeff(i.index());
|
|
++i;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
template<typename Derived>
|
|
template<typename OtherDerived>
|
|
typename internal::traits<Derived>::Scalar
|
|
SparseMatrixBase<Derived>::dot(const SparseMatrixBase<OtherDerived>& other) const
|
|
{
|
|
EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived)
|
|
EIGEN_STATIC_ASSERT_VECTOR_ONLY(OtherDerived)
|
|
EIGEN_STATIC_ASSERT_SAME_VECTOR_SIZE(Derived,OtherDerived)
|
|
EIGEN_STATIC_ASSERT((internal::is_same<Scalar, typename OtherDerived::Scalar>::value),
|
|
YOU_MIXED_DIFFERENT_NUMERIC_TYPES__YOU_NEED_TO_USE_THE_CAST_METHOD_OF_MATRIXBASE_TO_CAST_NUMERIC_TYPES_EXPLICITLY)
|
|
|
|
eigen_assert(size() == other.size());
|
|
|
|
typedef typename Derived::Nested Nested;
|
|
typedef typename OtherDerived::Nested OtherNested;
|
|
typedef typename internal::remove_all<Nested>::type NestedCleaned;
|
|
typedef typename internal::remove_all<OtherNested>::type OtherNestedCleaned;
|
|
|
|
Nested nthis(derived());
|
|
OtherNested nother(other.derived());
|
|
|
|
typename NestedCleaned::InnerIterator i(nthis,0);
|
|
typename OtherNestedCleaned::InnerIterator j(nother,0);
|
|
Scalar res(0);
|
|
while (i && j)
|
|
{
|
|
if (i.index()==j.index())
|
|
{
|
|
res += numext::conj(i.value()) * j.value();
|
|
++i; ++j;
|
|
}
|
|
else if (i.index()<j.index())
|
|
++i;
|
|
else
|
|
++j;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
template<typename Derived>
|
|
inline typename NumTraits<typename internal::traits<Derived>::Scalar>::Real
|
|
SparseMatrixBase<Derived>::squaredNorm() const
|
|
{
|
|
return numext::real((*this).cwiseAbs2().sum());
|
|
}
|
|
|
|
template<typename Derived>
|
|
inline typename NumTraits<typename internal::traits<Derived>::Scalar>::Real
|
|
SparseMatrixBase<Derived>::norm() const
|
|
{
|
|
using std::sqrt;
|
|
return sqrt(squaredNorm());
|
|
}
|
|
|
|
template<typename Derived>
|
|
inline typename NumTraits<typename internal::traits<Derived>::Scalar>::Real
|
|
SparseMatrixBase<Derived>::blueNorm() const
|
|
{
|
|
return internal::blueNorm_impl(*this);
|
|
}
|
|
} // end namespace Eigen
|
|
|
|
#endif // EIGEN_SPARSE_DOT_H
|