Base class of any sparse matrices or sparse expressions. More...
#include <SparseMatrixBase.h>
Public Types | |
enum | { RowsAtCompileTime, ColsAtCompileTime, SizeAtCompileTime , IsVectorAtCompileTime, Flags, CoeffReadCost } |
Public Member Functions | |
template<typename CustomBinaryOp , typename OtherDerived > | |
const CwiseBinaryOp < CustomBinaryOp, const Derived, const OtherDerived > | binaryExpr (const Eigen::SparseMatrixBase< OtherDerived > &other, const CustomBinaryOp &func=CustomBinaryOp()) const |
template<typename NewType > | |
internal::cast_return_type < Derived, const CwiseUnaryOp < internal::scalar_cast_op < typename internal::traits < Derived >::Scalar, NewType > , const Derived > >::type | cast () const |
SparseInnerVectorSet< Derived, 1 > | col (Index j) |
const SparseInnerVectorSet < Derived, 1 > | col (Index j) const |
Index | cols () const |
ConjugateReturnType | conjugate () const |
const CwiseUnaryOp < internal::scalar_abs_op < Scalar >, const Derived > | cwiseAbs () const |
const CwiseUnaryOp < internal::scalar_abs2_op < Scalar >, const Derived > | cwiseAbs2 () const |
template<typename OtherDerived > | |
const CwiseBinaryOp < std::equal_to< Scalar > , const Derived, const OtherDerived > | cwiseEqual (const Eigen::SparseMatrixBase< OtherDerived > &other) const |
const CwiseUnaryOp < std::binder1st < std::equal_to< Scalar > >, const Derived > | cwiseEqual (const Scalar &s) const |
const CwiseUnaryOp < internal::scalar_inverse_op < Scalar >, const Derived > | cwiseInverse () const |
template<typename OtherDerived > | |
const CwiseBinaryOp < internal::scalar_max_op < Scalar >, const Derived, const OtherDerived > | cwiseMax (const Eigen::SparseMatrixBase< OtherDerived > &other) const |
const CwiseBinaryOp < internal::scalar_max_op < Scalar >, const Derived, const ConstantReturnType > | cwiseMax (const Scalar &other) const |
template<typename OtherDerived > | |
const CwiseBinaryOp < internal::scalar_min_op < Scalar >, const Derived, const OtherDerived > | cwiseMin (const Eigen::SparseMatrixBase< OtherDerived > &other) const |
const CwiseBinaryOp < internal::scalar_min_op < Scalar >, const Derived, const ConstantReturnType > | cwiseMin (const Scalar &other) const |
template<typename OtherDerived > | |
const CwiseBinaryOp < std::not_equal_to< Scalar > , const Derived, const OtherDerived > | cwiseNotEqual (const Eigen::SparseMatrixBase< OtherDerived > &other) const |
template<typename OtherDerived > | |
const CwiseBinaryOp < internal::scalar_quotient_op < Scalar >, const Derived, const OtherDerived > | cwiseQuotient (const Eigen::SparseMatrixBase< OtherDerived > &other) const |
const CwiseUnaryOp < internal::scalar_sqrt_op < Scalar >, const Derived > | cwiseSqrt () const |
Derived & | derived () |
const Derived & | derived () const |
template<typename OtherDerived > | |
const | EIGEN_CWISE_PRODUCT_RETURN_TYPE (Derived, OtherDerived) cwiseProduct(const Eigen |
const internal::eval< Derived > ::type | eval () const |
const ImagReturnType | imag () const |
NonConstImagReturnType | imag () |
Index | innerSize () const |
SparseInnerVectorSet< Derived, 1 > | innerVector (Index outer) |
const SparseInnerVectorSet < Derived, 1 > | innerVector (Index outer) const |
SparseInnerVectorSet< Derived, Dynamic > | innerVectors (Index outerStart, Index outerSize) |
const SparseInnerVectorSet < Derived, Dynamic > | innerVectors (Index outerStart, Index outerSize) const |
bool | isVector () const |
SparseInnerVectorSet< Derived, Dynamic > | middleCols (Index start, Index size) |
const SparseInnerVectorSet < Derived, Dynamic > | middleCols (Index start, Index size) const |
SparseInnerVectorSet< Derived, Dynamic > | middleRows (Index start, Index size) |
const SparseInnerVectorSet < Derived, Dynamic > | middleRows (Index start, Index size) const |
Index | nonZeros () const |
const ScalarMultipleReturnType | operator* (const Scalar &scalar) const |
const CwiseUnaryOp < internal::scalar_multiple2_op < Scalar, std::complex< Scalar > >, const Derived > | operator* (const std::complex< Scalar > &scalar) const |
template<typename OtherDerived > | |
const SparseSparseProductReturnType < Derived, OtherDerived > ::Type | operator* (const SparseMatrixBase< OtherDerived > &other) const |
template<typename OtherDerived > | |
const SparseDenseProductReturnType < Derived, OtherDerived > ::Type | operator* (const MatrixBase< OtherDerived > &other) const |
const CwiseUnaryOp < internal::scalar_opposite_op < typename internal::traits < Derived >::Scalar >, const Derived > | operator- () const |
const CwiseUnaryOp < internal::scalar_quotient1_op < typename internal::traits < Derived >::Scalar >, const Derived > | operator/ (const Scalar &scalar) const |
Index | outerSize () const |
RealReturnType | real () const |
NonConstRealReturnType | real () |
SparseInnerVectorSet< Derived, 1 > | row (Index i) |
const SparseInnerVectorSet < Derived, 1 > | row (Index i) const |
Index | rows () const |
Index | size () const |
SparseSymmetricPermutationProduct < Derived, Upper|Lower > | twistedBy (const PermutationMatrix< Dynamic, Dynamic, Index > &perm) const |
template<typename CustomUnaryOp > | |
const CwiseUnaryOp < CustomUnaryOp, const Derived > | unaryExpr (const CustomUnaryOp &func=CustomUnaryOp()) const |
Apply a unary operator coefficient-wise. | |
template<typename CustomViewOp > | |
const CwiseUnaryView < CustomViewOp, const Derived > | unaryViewExpr (const CustomViewOp &func=CustomViewOp()) const |
Friends | |
template<typename OtherDerived > | |
const DenseSparseProductReturnType < OtherDerived, Derived > ::Type | operator* (const MatrixBase< OtherDerived > &lhs, const Derived &rhs) |
Base class of any sparse matrices or sparse expressions.
Derived | This class can be extended with the help of the plugin mechanism described on the page Customizing/Extending Eigen by defining the preprocessor symbol EIGEN_SPARSEMATRIXBASE_PLUGIN . |
anonymous enum |
RowsAtCompileTime |
The number of rows at compile-time. This is just a copy of the value provided by the Derived type. If a value is not known at compile-time, it is set to the Dynamic constant.
|
ColsAtCompileTime |
The number of columns at compile-time. This is just a copy of the value provided by the Derived type. If a value is not known at compile-time, it is set to the Dynamic constant.
|
SizeAtCompileTime |
This is equal to the number of coefficients, i.e. the number of rows times the number of columns, or to Dynamic if this is not known at compile-time.
|
IsVectorAtCompileTime |
This is set to true if either the number of rows or the number of columns is known at compile-time to be equal to 1. Indeed, in that case, we are dealing with a column-vector (if there is only one column) or with a row-vector (if there is only one row). |
Flags |
This stores expression Flags flags which may or may not be inherited by new expressions constructed from this one. See the list of flags. |
CoeffReadCost |
This is a rough measure of how expensive it is to read one coefficient from this expression. |
const CwiseBinaryOp<CustomBinaryOp, const Derived, const OtherDerived> binaryExpr | ( | const Eigen::SparseMatrixBase< OtherDerived > & | other, |
const CustomBinaryOp & | func = CustomBinaryOp() |
||
) | const [inline] |
*this
and other *this
and other The template parameter CustomBinaryOp is the type of the functor of the custom operator (see class CwiseBinaryOp for an example)
Here is an example illustrating the use of custom functors:
#include <Eigen/Core> #include <iostream> using namespace Eigen; using namespace std; // define a custom template binary functor template<typename Scalar> struct MakeComplexOp { EIGEN_EMPTY_STRUCT_CTOR(MakeComplexOp) typedef complex<Scalar> result_type; complex<Scalar> operator()(const Scalar& a, const Scalar& b) const { return complex<Scalar>(a,b); } }; int main(int, char**) { Matrix4d m1 = Matrix4d::Random(), m2 = Matrix4d::Random(); cout << m1.binaryExpr(m2, MakeComplexOp<double>()) << endl; return 0; }
Output:
(0.68,0.271) (0.823,-0.967) (-0.444,-0.687) (-0.27,0.998) (-0.211,0.435) (-0.605,-0.514) (0.108,-0.198) (0.0268,-0.563) (0.566,-0.717) (-0.33,-0.726) (-0.0452,-0.74) (0.904,0.0259) (0.597,0.214) (0.536,0.608) (0.258,-0.782) (0.832,0.678)
internal::cast_return_type<Derived,const CwiseUnaryOp<internal::scalar_cast_op<typename internal::traits<Derived>::Scalar, NewType>, const Derived> >::type cast | ( | ) | const [inline] |
The template parameter NewScalar is the type we are casting the scalars to.
SparseInnerVectorSet< Derived, 1 > col | ( | Index | i | ) |
*this
. For column-major matrix only. const SparseInnerVectorSet< Derived, 1 > col | ( | Index | i | ) | const |
*this
. For column-major matrix only. (read-only version) Index cols | ( | void | ) | const [inline] |
Reimplemented from EigenBase< Derived >.
Reimplemented in SparseMatrix< _Scalar, _Options, _Index >, SparseMatrix< Scalar >, SparseMatrix< Scalar, ColMajor, Index >, SparseMatrix< Scalar, ColMajor >, SparseMatrix< Scalar, ColMajor, int >, SparseMatrix< Scalar, RowMajor, Index >, SparseMatrix< Scalar, RowMajor >, SparseVector< _Scalar, _Options, _Index >, and MappedSparseMatrix< _Scalar, _Flags, _Index >.
Referenced by SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::innerSize(), SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::isVector(), SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::outerSize(), and SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::size().
ConjugateReturnType conjugate | ( | ) | const [inline] |
*this
.const CwiseUnaryOp<internal::scalar_abs_op<Scalar>, const Derived> cwiseAbs | ( | ) | const [inline] |
*this
Example:
MatrixXd m(2,3); m << 2, -4, 6, -5, 1, 0; cout << m.cwiseAbs() << endl;
Output:
2 4 6 5 1 0
const CwiseUnaryOp<internal::scalar_abs2_op<Scalar>, const Derived> cwiseAbs2 | ( | ) | const [inline] |
*this
Example:
MatrixXd m(2,3); m << 2, -4, 6, -5, 1, 0; cout << m.cwiseAbs2() << endl;
Output:
4 16 36 25 1 0
const CwiseBinaryOp<std::equal_to<Scalar>, const Derived, const OtherDerived> cwiseEqual | ( | const Eigen::SparseMatrixBase< OtherDerived > & | other | ) | const [inline] |
Example:
MatrixXi m(2,2); m << 1, 0, 1, 1; cout << "Comparing m with identity matrix:" << endl; cout << m.cwiseEqual(MatrixXi::Identity(2,2)) << endl; int count = m.cwiseEqual(MatrixXi::Identity(2,2)).count(); cout << "Number of coefficients that are equal: " << count << endl;
Output:
Comparing m with identity matrix: 1 1 0 1 Number of coefficients that are equal: 3
const CwiseUnaryOp<std::binder1st<std::equal_to<Scalar> >, const Derived> cwiseEqual | ( | const Scalar & | s | ) | const [inline] |
*this
and a scalar s const CwiseUnaryOp<internal::scalar_inverse_op<Scalar>, const Derived> cwiseInverse | ( | ) | const [inline] |
Example:
MatrixXd m(2,3); m << 2, 0.5, 1, 3, 0.25, 1; cout << m.cwiseInverse() << endl;
Output:
0.5 2 1 0.333 4 1
const CwiseBinaryOp<internal::scalar_max_op<Scalar>, const Derived, const OtherDerived> cwiseMax | ( | const Eigen::SparseMatrixBase< OtherDerived > & | other | ) | const [inline] |
Example:
Vector3d v(2,3,4), w(4,2,3); cout << v.cwiseMax(w) << endl;
Output:
4 3 4
const CwiseBinaryOp<internal::scalar_max_op<Scalar>, const Derived, const ConstantReturnType> cwiseMax | ( | const Scalar & | other | ) | const [inline] |
const CwiseBinaryOp<internal::scalar_min_op<Scalar>, const Derived, const OtherDerived> cwiseMin | ( | const Eigen::SparseMatrixBase< OtherDerived > & | other | ) | const [inline] |
Example:
Vector3d v(2,3,4), w(4,2,3); cout << v.cwiseMin(w) << endl;
Output:
2 2 3
const CwiseBinaryOp<internal::scalar_min_op<Scalar>, const Derived, const ConstantReturnType> cwiseMin | ( | const Scalar & | other | ) | const [inline] |
const CwiseBinaryOp<std::not_equal_to<Scalar>, const Derived, const OtherDerived> cwiseNotEqual | ( | const Eigen::SparseMatrixBase< OtherDerived > & | other | ) | const [inline] |
Example:
MatrixXi m(2,2); m << 1, 0, 1, 1; cout << "Comparing m with identity matrix:" << endl; cout << m.cwiseNotEqual(MatrixXi::Identity(2,2)) << endl; int count = m.cwiseNotEqual(MatrixXi::Identity(2,2)).count(); cout << "Number of coefficients that are not equal: " << count << endl;
Output:
Comparing m with identity matrix: 0 0 1 0 Number of coefficients that are not equal: 1
const CwiseBinaryOp<internal::scalar_quotient_op<Scalar>, const Derived, const OtherDerived> cwiseQuotient | ( | const Eigen::SparseMatrixBase< OtherDerived > & | other | ) | const [inline] |
Example:
Vector3d v(2,3,4), w(4,2,3); cout << v.cwiseQuotient(w) << endl;
Output:
0.5 1.5 1.33
const CwiseUnaryOp<internal::scalar_sqrt_op<Scalar>, const Derived> cwiseSqrt | ( | ) | const [inline] |
Example:
Vector3d v(1,2,4); cout << v.cwiseSqrt() << endl;
Output:
1 1.41 2
Derived& derived | ( | ) | [inline, inherited] |
Referenced by MatrixBase< Derived >::applyOnTheLeft(), MatrixBase< Derived >::applyOnTheRight(), PermutationBase< PermutationMatrix< SizeAtCompileTime, MaxSizeAtCompileTime, Index > >::applyTranspositionOnTheLeft(), PermutationBase< PermutationMatrix< SizeAtCompileTime, MaxSizeAtCompileTime, Index > >::applyTranspositionOnTheRight(), SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::binaryExpr(), EigenBase< PermutationMatrix< SizeAtCompileTime, MaxSizeAtCompileTime, Index > >::cols(), SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::cols(), SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::eval(), SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::imag(), PermutationBase< PermutationMatrix< SizeAtCompileTime, MaxSizeAtCompileTime, Index > >::indices(), PermutationBase< PermutationMatrix< SizeAtCompileTime, MaxSizeAtCompileTime, Index > >::inverse(), SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::nonZeros(), RotationBase< Derived, 3 >::operator*(), Translation< _Scalar, _Dim >::operator*(), PermutationBase< PermutationMatrix< SizeAtCompileTime, MaxSizeAtCompileTime, Index > >::operator*(), SparseMatrixBase< Derived >::operator*(), Transform< _Scalar, _Dim, _Mode, _Options >::operator*(), Eigen::operator*(), MatrixBase< Derived >::operator*=(), PermutationBase< PermutationMatrix< SizeAtCompileTime, MaxSizeAtCompileTime, Index > >::operator=(), MatrixBase< Derived >::operator=(), DenseBase< Derived >::operator=(), Transform< _Scalar, _Dim, _Mode, _Options >::operator=(), PlainObjectBase< Matrix< int, _Rows, _Cols, _Options, _MaxRows, _MaxCols > >::operator=(), PlainObjectBase< Matrix< int, _Rows, _Cols, _Options, _MaxRows, _MaxCols > >::PlainObjectBase(), PlainObjectBase< Matrix< int, _Rows, _Cols, _Options, _MaxRows, _MaxCols > >::resizeLike(), EigenBase< PermutationMatrix< SizeAtCompileTime, MaxSizeAtCompileTime, Index > >::rows(), SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::rows(), SimplicialCholeskyBase< SimplicialLDLT< _MatrixType, _UpLo > >::solve(), IterativeSolverBase< ConjugateGradient< _MatrixType, _UpLo, _Preconditioner > >::solve(), CholmodBase< _MatrixType, _UpLo, CholmodSimplicialLLT< _MatrixType, _UpLo > >::solve(), SparseMatrix< Scalar, RowMajor >::SparseMatrix(), PermutationBase< PermutationMatrix< SizeAtCompileTime, MaxSizeAtCompileTime, Index > >::toDenseMatrix(), Transform< _Scalar, _Dim, _Mode, _Options >::Transform(), PermutationBase< PermutationMatrix< SizeAtCompileTime, MaxSizeAtCompileTime, Index > >::transpose(), and SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::twistedBy().
const Derived& derived | ( | ) | const [inline, inherited] |
const EIGEN_CWISE_PRODUCT_RETURN_TYPE | ( | Derived | , |
OtherDerived | |||
) | const [inline] |
Example:
Matrix3i a = Matrix3i::Random(), b = Matrix3i::Random(); Matrix3i c = a.cwiseProduct(b); cout << "a:\n" << a << "\nb:\n" << b << "\nc:\n" << c << endl;
Output:
a: 7 6 -3 -2 9 6 6 -6 -5 b: 1 -3 9 0 0 3 3 9 5 c: 7 -18 -27 0 0 18 18 -54 -25
const internal::eval<Derived>::type eval | ( | ) | const [inline] |
Notice that in the case of a plain matrix or vector (not an expression) this function just returns a const reference, in order to avoid a useless copy.
const ImagReturnType imag | ( | ) | const [inline] |
*this
.NonConstImagReturnType imag | ( | ) | [inline] |
*this
.Index innerSize | ( | ) | const [inline] |
Reimplemented in SparseMatrix< _Scalar, _Options, _Index >, SparseMatrix< Scalar >, SparseMatrix< Scalar, ColMajor, Index >, SparseMatrix< Scalar, ColMajor >, SparseMatrix< Scalar, ColMajor, int >, SparseMatrix< Scalar, RowMajor, Index >, SparseMatrix< Scalar, RowMajor >, SparseVector< _Scalar, _Options, _Index >, and MappedSparseMatrix< _Scalar, _Flags, _Index >.
SparseInnerVectorSet< Derived, 1 > innerVector | ( | Index | outer | ) |
*this
if *this
is col-major (resp. row-major). const SparseInnerVectorSet< Derived, 1 > innerVector | ( | Index | outer | ) | const |
*this
if *this
is col-major (resp. row-major). Read-only. SparseInnerVectorSet< Derived, Dynamic > innerVectors | ( | Index | outerStart, |
Index | outerSize | ||
) |
*this
if *this
is col-major (resp. row-major). const SparseInnerVectorSet< Derived, Dynamic > innerVectors | ( | Index | outerStart, |
Index | outerSize | ||
) | const |
*this
if *this
is col-major (resp. row-major). Read-only. bool isVector | ( | ) | const [inline] |
SparseInnerVectorSet< Derived, Dynamic > middleCols | ( | Index | start, |
Index | size | ||
) |
*this
. For column-major matrix only. const SparseInnerVectorSet< Derived, Dynamic > middleCols | ( | Index | start, |
Index | size | ||
) | const |
*this
. For column-major matrix only. (read-only version) SparseInnerVectorSet< Derived, Dynamic > middleRows | ( | Index | start, |
Index | size | ||
) |
*this
. For row-major matrix only. const SparseInnerVectorSet< Derived, Dynamic > middleRows | ( | Index | start, |
Index | size | ||
) | const |
*this
. For row-major matrix only. (read-only version) Index nonZeros | ( | ) | const [inline] |
Reimplemented in SparseMatrix< _Scalar, _Options, _Index >, SparseMatrix< Scalar >, SparseMatrix< Scalar, ColMajor, Index >, SparseMatrix< Scalar, ColMajor >, SparseMatrix< Scalar, ColMajor, int >, SparseMatrix< Scalar, RowMajor, Index >, SparseMatrix< Scalar, RowMajor >, SparseVector< _Scalar, _Options, _Index >, and MappedSparseMatrix< _Scalar, _Flags, _Index >.
const ScalarMultipleReturnType operator* | ( | const Scalar & | scalar | ) | const [inline] |
*this
scaled by the scalar factor scalar const CwiseUnaryOp<internal::scalar_multiple2_op<Scalar,std::complex<Scalar> >, const Derived> operator* | ( | const std::complex< Scalar > & | scalar | ) | const [inline] |
Overloaded for efficient real matrix times complex scalar value
const SparseSparseProductReturnType< Derived, OtherDerived >::Type operator* | ( | const SparseMatrixBase< OtherDerived > & | other | ) | const [inline] |
C = (A*B).pruned(); // supress numerical zeros (exact)
C = (A*B).pruned(ref);
C = (A*B).pruned(ref,epsilon);
ref
is a meaningful non zero reference value. References EigenBase< Derived >::derived().
const SparseDenseProductReturnType< Derived, OtherDerived >::Type operator* | ( | const MatrixBase< OtherDerived > & | other | ) | const [inline] |
sparse * dense (returns a dense object unless it is an outer product)
const CwiseUnaryOp<internal::scalar_opposite_op<typename internal::traits<Derived>::Scalar>, const Derived> operator- | ( | ) | const [inline] |
*this
const CwiseUnaryOp<internal::scalar_quotient1_op<typename internal::traits<Derived>::Scalar>, const Derived> operator/ | ( | const Scalar & | scalar | ) | const [inline] |
*this
divided by the scalar value scalar Index outerSize | ( | ) | const [inline] |
Reimplemented in SparseMatrix< _Scalar, _Options, _Index >, SparseMatrix< Scalar >, SparseMatrix< Scalar, ColMajor, Index >, SparseMatrix< Scalar, ColMajor >, SparseMatrix< Scalar, ColMajor, int >, SparseMatrix< Scalar, RowMajor, Index >, SparseMatrix< Scalar, RowMajor >, SparseVector< _Scalar, _Options, _Index >, and MappedSparseMatrix< _Scalar, _Flags, _Index >.
RealReturnType real | ( | ) | const [inline] |
*this
.NonConstRealReturnType real | ( | ) | [inline] |
*this
.SparseInnerVectorSet< Derived, 1 > row | ( | Index | i | ) |
*this
. For row-major matrix only. const SparseInnerVectorSet< Derived, 1 > row | ( | Index | i | ) | const |
*this
. For row-major matrix only. (read-only version) Index rows | ( | void | ) | const [inline] |
Reimplemented from EigenBase< Derived >.
Reimplemented in SparseMatrix< _Scalar, _Options, _Index >, SparseMatrix< Scalar >, SparseMatrix< Scalar, ColMajor, Index >, SparseMatrix< Scalar, ColMajor >, SparseMatrix< Scalar, ColMajor, int >, SparseMatrix< Scalar, RowMajor, Index >, SparseMatrix< Scalar, RowMajor >, SparseVector< _Scalar, _Options, _Index >, and MappedSparseMatrix< _Scalar, _Flags, _Index >.
Referenced by SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::innerSize(), SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::isVector(), SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::outerSize(), SparseMatrixBase< CwiseBinaryOp< BinaryOp, Lhs, Rhs > >::size(), SimplicialCholeskyBase< SimplicialLDLT< _MatrixType, _UpLo > >::solve(), IterativeSolverBase< ConjugateGradient< _MatrixType, _UpLo, _Preconditioner > >::solve(), and CholmodBase< _MatrixType, _UpLo, CholmodSimplicialLLT< _MatrixType, _UpLo > >::solve().
Index size | ( | ) | const [inline] |
Reimplemented from EigenBase< Derived >.
SparseSymmetricPermutationProduct<Derived,Upper|Lower> twistedBy | ( | const PermutationMatrix< Dynamic, Dynamic, Index > & | perm | ) | const [inline] |
*this
const CwiseUnaryOp<CustomUnaryOp, const Derived> unaryExpr | ( | const CustomUnaryOp & | func = CustomUnaryOp() | ) | const [inline] |
Apply a unary operator coefficient-wise.
[in] | func | Functor implementing the unary operator |
CustomUnaryOp | Type of func |
The function ptr_fun()
from the C++ standard library can be used to make functors out of normal functions.
Example:
#include <Eigen/Core> #include <iostream> using namespace Eigen; using namespace std; // define function to be applied coefficient-wise double ramp(double x) { if (x > 0) return x; else return 0; } int main(int, char**) { Matrix4d m1 = Matrix4d::Random(); cout << m1 << endl << "becomes: " << endl << m1.unaryExpr(ptr_fun(ramp)) << endl; return 0; }
Output:
0.68 0.823 -0.444 -0.27 -0.211 -0.605 0.108 0.0268 0.566 -0.33 -0.0452 0.904 0.597 0.536 0.258 0.832 becomes: 0.68 0.823 0 0 0 0 0.108 0.0268 0.566 0 0 0.904 0.597 0.536 0.258 0.832
Genuine functors allow for more possibilities, for instance it may contain a state.
Example:
#include <Eigen/Core> #include <iostream> using namespace Eigen; using namespace std; // define a custom template unary functor template<typename Scalar> struct CwiseClampOp { CwiseClampOp(const Scalar& inf, const Scalar& sup) : m_inf(inf), m_sup(sup) {} const Scalar operator()(const Scalar& x) const { return x<m_inf ? m_inf : (x>m_sup ? m_sup : x); } Scalar m_inf, m_sup; }; int main(int, char**) { Matrix4d m1 = Matrix4d::Random(); cout << m1 << endl << "becomes: " << endl << m1.unaryExpr(CwiseClampOp<double>(-0.5,0.5)) << endl; return 0; }
Output:
0.68 0.823 -0.444 -0.27 -0.211 -0.605 0.108 0.0268 0.566 -0.33 -0.0452 0.904 0.597 0.536 0.258 0.832 becomes: 0.5 0.5 -0.444 -0.27 -0.211 -0.5 0.108 0.0268 0.5 -0.33 -0.0452 0.5 0.5 0.5 0.258 0.5
const CwiseUnaryView<CustomViewOp, const Derived> unaryViewExpr | ( | const CustomViewOp & | func = CustomViewOp() | ) | const [inline] |
The template parameter CustomUnaryOp is the type of the functor of the custom unary operator.
Example:
#include <Eigen/Core> #include <iostream> using namespace Eigen; using namespace std; // define a custom template unary functor template<typename Scalar> struct CwiseClampOp { CwiseClampOp(const Scalar& inf, const Scalar& sup) : m_inf(inf), m_sup(sup) {} const Scalar operator()(const Scalar& x) const { return x<m_inf ? m_inf : (x>m_sup ? m_sup : x); } Scalar m_inf, m_sup; }; int main(int, char**) { Matrix4d m1 = Matrix4d::Random(); cout << m1 << endl << "becomes: " << endl << m1.unaryExpr(CwiseClampOp<double>(-0.5,0.5)) << endl; return 0; }
Output:
0.68 0.823 -0.444 -0.27 -0.211 -0.605 0.108 0.0268 0.566 -0.33 -0.0452 0.904 0.597 0.536 0.258 0.832 becomes: 0.5 0.5 -0.444 -0.27 -0.211 -0.5 0.108 0.0268 0.5 -0.33 -0.0452 0.5 0.5 0.5 0.258 0.5
const DenseSparseProductReturnType<OtherDerived,Derived>::Type operator* | ( | const MatrixBase< OtherDerived > & | lhs, |
const Derived & | rhs | ||
) | [friend] |
dense * sparse (return a dense object unless it is an outer product)