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Eigen
3.3.9
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General-purpose arrays with easy API for coefficient-wise operations.
The Array class is very similar to the Matrix class. It provides general-purpose one- and two-dimensional arrays. The difference between the Array and the Matrix class is primarily in the API: the API for the Array class provides easy access to coefficient-wise operations, while the API for the Matrix class provides easy access to linear-algebra operations.
See documentation of class Matrix for detailed information on the template parameters storage layout.
This class can be extended with the help of the plugin mechanism described on the page Extending MatrixBase (and other classes) by defining the preprocessor symbol EIGEN_ARRAY_PLUGIN
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Public Member Functions | |
Array () | |
Array (const Array &other) | |
template<typename OtherDerived > | |
Array (const EigenBase< OtherDerived > &other, typename internal::enable_if< internal::is_convertible< typename OtherDerived::Scalar, Scalar >::value, PrivateType >::type=PrivateType()) | |
Array (const Scalar &val0, const Scalar &val1) | |
Array (const Scalar &val0, const Scalar &val1, const Scalar &val2) | |
Array (const Scalar &val0, const Scalar &val1, const Scalar &val2, const Scalar &val3) | |
Array (const Scalar &value) | |
Array (const Scalar *data) | |
Constructs a fixed-sized array initialized with coefficients starting at data. | |
Array (Index dim) | |
Array (Index rows, Index cols) | |
const Scalar & | coeff (Index index) const |
const Scalar & | coeff (Index rowId, Index colId) const |
Scalar & | coeffRef (Index index) |
const Scalar & | coeffRef (Index index) const |
Scalar & | coeffRef (Index rowId, Index colId) |
const Scalar & | coeffRef (Index rowId, Index colId) const |
Array & | operator= (const Array &other) |
template<typename OtherDerived > | |
Array & | operator= (const DenseBase< OtherDerived > &other) |
template<typename OtherDerived > | |
Array & | operator= (const EigenBase< OtherDerived > &other) |
Array & | operator= (const Scalar &value) |
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const Scalar & | coeff (Index index) const |
const Scalar & | coeff (Index rowId, Index colId) const |
Scalar & | coeffRef (Index index) |
const Scalar & | coeffRef (Index index) const |
Scalar & | coeffRef (Index rowId, Index colId) |
const Scalar & | coeffRef (Index rowId, Index colId) const |
void | conservativeResize (Index rows, Index cols) |
void | conservativeResize (Index rows, NoChange_t) |
void | conservativeResize (Index size) |
void | conservativeResize (NoChange_t, Index cols) |
void | conservativeResizeLike (const DenseBase< OtherDerived > &other) |
Scalar * | data () |
const Scalar * | data () const |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | lazyAssign (const DenseBase< OtherDerived > &other) |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | operator= (const EigenBase< OtherDerived > &other) |
Copies the generic expression other into *this. More... | |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | operator= (const PlainObjectBase &other) |
void | resize (Index rows, Index cols) |
void | resize (Index rows, NoChange_t) |
void | resize (Index size) |
void | resize (NoChange_t, Index cols) |
void | resizeLike (const EigenBase< OtherDerived > &_other) |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | setConstant (Index size, const Scalar &val) |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | setConstant (Index rows, Index cols, const Scalar &val) |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | setZero (Index size) |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | setZero (Index rows, Index cols) |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | setOnes (Index size) |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | setOnes (Index rows, Index cols) |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | setRandom (Index size) |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | setRandom (Index rows, Index cols) |
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MatrixWrapper< Derived > | matrix () |
template<typename OtherDerived > | |
Derived & | operator*= (const ArrayBase< OtherDerived > &other) |
template<typename OtherDerived > | |
Derived & | operator+= (const ArrayBase< OtherDerived > &other) |
template<typename OtherDerived > | |
Derived & | operator-= (const ArrayBase< OtherDerived > &other) |
template<typename OtherDerived > | |
Derived & | operator/= (const ArrayBase< OtherDerived > &other) |
Derived & | operator= (const ArrayBase &other) |
Derived & | operator= (const Scalar &value) |
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bool | all () const |
bool | allFinite () const |
bool | any () const |
ColwiseReturnType | colwise () |
ConstColwiseReturnType | colwise () const |
Index | count () const |
EvalReturnType | eval () const |
void | fill (const Scalar &value) |
template<unsigned int Added, unsigned int Removed> | |
EIGEN_DEPRECATED const Derived & | flagged () const |
const WithFormat< Derived > | format (const IOFormat &fmt) const |
bool | hasNaN () const |
Index | innerSize () const |
template<typename OtherDerived > | |
bool | isApprox (const DenseBase< OtherDerived > &other, const RealScalar &prec=NumTraits< Scalar >::dummy_precision()) const |
bool | isApproxToConstant (const Scalar &value, const RealScalar &prec=NumTraits< Scalar >::dummy_precision()) const |
bool | isConstant (const Scalar &value, const RealScalar &prec=NumTraits< Scalar >::dummy_precision()) const |
template<typename OtherDerived > | |
bool | isMuchSmallerThan (const DenseBase< OtherDerived > &other, const RealScalar &prec=NumTraits< Scalar >::dummy_precision()) const |
template<typename Derived > | |
bool | isMuchSmallerThan (const typename NumTraits< Scalar >::Real &other, const RealScalar &prec) const |
bool | isOnes (const RealScalar &prec=NumTraits< Scalar >::dummy_precision()) const |
bool | isZero (const RealScalar &prec=NumTraits< Scalar >::dummy_precision()) const |
internal::traits< Derived >::Scalar | maxCoeff () const |
template<typename IndexType > | |
internal::traits< Derived >::Scalar | maxCoeff (IndexType *index) const |
template<typename IndexType > | |
internal::traits< Derived >::Scalar | maxCoeff (IndexType *row, IndexType *col) const |
Scalar | mean () const |
internal::traits< Derived >::Scalar | minCoeff () const |
template<typename IndexType > | |
internal::traits< Derived >::Scalar | minCoeff (IndexType *index) const |
template<typename IndexType > | |
internal::traits< Derived >::Scalar | minCoeff (IndexType *row, IndexType *col) const |
const NestByValue< Derived > | nestByValue () const |
Index | nonZeros () const |
template<typename CustomNullaryOp > | |
const CwiseNullaryOp< CustomNullaryOp, typename DenseBase< Derived >::PlainObject > | NullaryExpr (const CustomNullaryOp &func) |
template<typename CustomNullaryOp > | |
const CwiseNullaryOp< CustomNullaryOp, typename DenseBase< Derived >::PlainObject > | NullaryExpr (Index rows, Index cols, const CustomNullaryOp &func) |
template<typename CustomNullaryOp > | |
const CwiseNullaryOp< CustomNullaryOp, typename DenseBase< Derived >::PlainObject > | NullaryExpr (Index size, const CustomNullaryOp &func) |
template<typename OtherDerived > | |
CommaInitializer< Derived > | operator<< (const DenseBase< OtherDerived > &other) |
CommaInitializer< Derived > | operator<< (const Scalar &s) |
Derived & | operator= (const DenseBase &other) |
template<typename OtherDerived > | |
Derived & | operator= (const DenseBase< OtherDerived > &other) |
template<typename OtherDerived > | |
Derived & | operator= (const EigenBase< OtherDerived > &other) |
Copies the generic expression other into *this. More... | |
Index | outerSize () const |
Scalar | prod () const |
template<typename Func > | |
internal::traits< Derived >::Scalar | redux (const Func &func) const |
template<int RowFactor, int ColFactor> | |
const Replicate< Derived, RowFactor, ColFactor > | replicate () const |
const Replicate< Derived, Dynamic, Dynamic > | replicate (Index rowFactor, Index colFactor) const |
void | resize (Index newSize) |
void | resize (Index rows, Index cols) |
ReverseReturnType | reverse () |
ConstReverseReturnType | reverse () const |
void | reverseInPlace () |
RowwiseReturnType | rowwise () |
ConstRowwiseReturnType | rowwise () const |
template<typename ThenDerived , typename ElseDerived > | |
const Select< Derived, ThenDerived, ElseDerived > | select (const DenseBase< ThenDerived > &thenMatrix, const DenseBase< ElseDerived > &elseMatrix) const |
template<typename ThenDerived > | |
const Select< Derived, ThenDerived, typename ThenDerived::ConstantReturnType > | select (const DenseBase< ThenDerived > &thenMatrix, const typename ThenDerived::Scalar &elseScalar) const |
template<typename ElseDerived > | |
const Select< Derived, typename ElseDerived::ConstantReturnType, ElseDerived > | select (const typename ElseDerived::Scalar &thenScalar, const DenseBase< ElseDerived > &elseMatrix) const |
Derived & | setConstant (const Scalar &value) |
Derived & | setLinSpaced (const Scalar &low, const Scalar &high) |
Sets a linearly spaced vector. More... | |
Derived & | setLinSpaced (Index size, const Scalar &low, const Scalar &high) |
Sets a linearly spaced vector. More... | |
Derived & | setOnes () |
Derived & | setRandom () |
Derived & | setZero () |
Scalar | sum () const |
template<typename OtherDerived > | |
void | swap (const DenseBase< OtherDerived > &other) |
template<typename OtherDerived > | |
void | swap (PlainObjectBase< OtherDerived > &other) |
TransposeReturnType | transpose () |
ConstTransposeReturnType | transpose () const |
void | transposeInPlace () |
CoeffReturnType | value () const |
template<typename Visitor > | |
void | visit (Visitor &func) const |
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Index | cols () const |
Index | colStride () const |
Derived & | derived () |
const Derived & | derived () const |
Index | innerStride () const |
Index | outerStride () const |
Index | rows () const |
Index | rowStride () const |
Index | size () const |
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Scalar & | coeffRef (Index index) |
Scalar & | coeffRef (Index row, Index col) |
Index | cols () const |
Derived & | derived () |
const Derived & | derived () const |
Scalar & | operator() (Index index) |
Scalar & | operator() (Index row, Index col) |
Scalar & | operator[] (Index index) |
Index | rows () const |
Index | size () const |
Scalar & | w () |
Scalar & | x () |
Scalar & | y () |
Scalar & | z () |
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CoeffReturnType | coeff (Index index) const |
CoeffReturnType | coeff (Index row, Index col) const |
Index | cols () const |
Derived & | derived () |
const Derived & | derived () const |
CoeffReturnType | operator() (Index index) const |
CoeffReturnType | operator() (Index row, Index col) const |
CoeffReturnType | operator[] (Index index) const |
Index | rows () const |
Index | size () const |
CoeffReturnType | w () const |
CoeffReturnType | x () const |
CoeffReturnType | y () const |
CoeffReturnType | z () const |
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Index | cols () const |
Derived & | derived () |
const Derived & | derived () const |
Index | rows () const |
Index | size () const |
Additional Inherited Members | |
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enum | { RowsAtCompileTime, ColsAtCompileTime, SizeAtCompileTime, MaxRowsAtCompileTime, MaxColsAtCompileTime, MaxSizeAtCompileTime, IsVectorAtCompileTime, Flags, IsRowMajor } |
typedef Array< typename internal::traits< Derived >::Scalar, internal::traits< Derived >::RowsAtCompileTime, internal::traits< Derived >::ColsAtCompileTime, AutoAlign|(internal::traits< Derived >::Flags &RowMajorBit ? RowMajor :ColMajor), internal::traits< Derived >::MaxRowsAtCompileTime, internal::traits< Derived >::MaxColsAtCompileTime > | PlainArray |
typedef Matrix< typename internal::traits< Derived >::Scalar, internal::traits< Derived >::RowsAtCompileTime, internal::traits< Derived >::ColsAtCompileTime, AutoAlign|(internal::traits< Derived >::Flags &RowMajorBit ? RowMajor :ColMajor), internal::traits< Derived >::MaxRowsAtCompileTime, internal::traits< Derived >::MaxColsAtCompileTime > | PlainMatrix |
typedef internal::conditional< internal::is_same< typename internal::traits< Derived >::XprKind, MatrixXpr >::value, PlainMatrix, PlainArray >::type | PlainObject |
The plain matrix or array type corresponding to this expression. More... | |
typedef internal::traits< Derived >::Scalar | Scalar |
typedef internal::traits< Derived >::StorageIndex | StorageIndex |
The type used to store indices. More... | |
typedef Scalar | value_type |
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typedef Eigen::Index | Index |
The interface type of indices. More... | |
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static ConstMapType | Map (const Scalar *data) |
static MapType | Map (Scalar *data) |
static ConstMapType | Map (const Scalar *data, Index size) |
static MapType | Map (Scalar *data, Index size) |
static ConstMapType | Map (const Scalar *data, Index rows, Index cols) |
static MapType | Map (Scalar *data, Index rows, Index cols) |
static StridedConstMapType< Stride< Outer, Inner > >::type | Map (const Scalar *data, const Stride< Outer, Inner > &stride) |
static StridedMapType< Stride< Outer, Inner > >::type | Map (Scalar *data, const Stride< Outer, Inner > &stride) |
static StridedConstMapType< Stride< Outer, Inner > >::type | Map (const Scalar *data, Index size, const Stride< Outer, Inner > &stride) |
static StridedMapType< Stride< Outer, Inner > >::type | Map (Scalar *data, Index size, const Stride< Outer, Inner > &stride) |
static StridedConstMapType< Stride< Outer, Inner > >::type | Map (const Scalar *data, Index rows, Index cols, const Stride< Outer, Inner > &stride) |
static StridedMapType< Stride< Outer, Inner > >::type | Map (Scalar *data, Index rows, Index cols, const Stride< Outer, Inner > &stride) |
static ConstAlignedMapType | MapAligned (const Scalar *data) |
static AlignedMapType | MapAligned (Scalar *data) |
static ConstAlignedMapType | MapAligned (const Scalar *data, Index size) |
static AlignedMapType | MapAligned (Scalar *data, Index size) |
static ConstAlignedMapType | MapAligned (const Scalar *data, Index rows, Index cols) |
static AlignedMapType | MapAligned (Scalar *data, Index rows, Index cols) |
static StridedConstAlignedMapType< Stride< Outer, Inner > >::type | MapAligned (const Scalar *data, const Stride< Outer, Inner > &stride) |
static StridedAlignedMapType< Stride< Outer, Inner > >::type | MapAligned (Scalar *data, const Stride< Outer, Inner > &stride) |
static StridedConstAlignedMapType< Stride< Outer, Inner > >::type | MapAligned (const Scalar *data, Index size, const Stride< Outer, Inner > &stride) |
static StridedAlignedMapType< Stride< Outer, Inner > >::type | MapAligned (Scalar *data, Index size, const Stride< Outer, Inner > &stride) |
static StridedConstAlignedMapType< Stride< Outer, Inner > >::type | MapAligned (const Scalar *data, Index rows, Index cols, const Stride< Outer, Inner > &stride) |
static StridedAlignedMapType< Stride< Outer, Inner > >::type | MapAligned (Scalar *data, Index rows, Index cols, const Stride< Outer, Inner > &stride) |
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static const ConstantReturnType | Constant (const Scalar &value) |
static const ConstantReturnType | Constant (Index rows, Index cols, const Scalar &value) |
static const ConstantReturnType | Constant (Index size, const Scalar &value) |
static const RandomAccessLinSpacedReturnType | LinSpaced (const Scalar &low, const Scalar &high) |
Sets a linearly spaced vector. More... | |
static const RandomAccessLinSpacedReturnType | LinSpaced (Index size, const Scalar &low, const Scalar &high) |
Sets a linearly spaced vector. More... | |
static const SequentialLinSpacedReturnType | LinSpaced (Sequential_t, const Scalar &low, const Scalar &high) |
static const SequentialLinSpacedReturnType | LinSpaced (Sequential_t, Index size, const Scalar &low, const Scalar &high) |
static const ConstantReturnType | Ones () |
static const ConstantReturnType | Ones (Index rows, Index cols) |
static const ConstantReturnType | Ones (Index size) |
static const RandomReturnType | Random () |
static const RandomReturnType | Random (Index rows, Index cols) |
static const RandomReturnType | Random (Index size) |
static const ConstantReturnType | Zero () |
static const ConstantReturnType | Zero (Index rows, Index cols) |
static const ConstantReturnType | Zero (Index size) |
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PlainObjectBase (const DenseBase< OtherDerived > &other) | |
PlainObjectBase (const EigenBase< OtherDerived > &other) | |
PlainObjectBase (const PlainObjectBase &other) | |
PlainObjectBase (const ReturnByValue< OtherDerived > &other) | |
Copy constructor with in-place evaluation. | |
void | _resize_to_match (const EigenBase< OtherDerived > &other) |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | _set (const DenseBase< OtherDerived > &other) |
Copies the value of the expression other into *this with automatic resizing. More... | |
Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > & | _set_noalias (const DenseBase< OtherDerived > &other) |
void | _init2 (Index rows, Index cols, typename internal::enable_if< Base::SizeAtCompileTime!=2, T0 >::type *=0) |
void | _init2 (const T0 &val0, const T1 &val1, typename internal::enable_if< Base::SizeAtCompileTime==2, T0 >::type *=0) |
void | _init2 (const Index &val0, const Index &val1, typename internal::enable_if<(!internal::is_same< Index, Scalar >::value) &&(internal::is_same< T0, Index >::value) &&(internal::is_same< T1, Index >::value) &&Base::SizeAtCompileTime==2, T1 >::type *=0) |
void | _init1 (Index size, typename internal::enable_if<(Base::SizeAtCompileTime!=1||!internal::is_convertible< T, Scalar >::value) &&((!internal::is_same< typename internal::traits< Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > >::XprKind, ArrayXpr >::value||Base::SizeAtCompileTime==Dynamic)), T >::type *=0) |
void | _init1 (const Scalar &val0, typename internal::enable_if< Base::SizeAtCompileTime==1 &&internal::is_convertible< T, Scalar >::value, T >::type *=0) |
void | _init1 (const Index &val0, typename internal::enable_if<(!internal::is_same< Index, Scalar >::value) &&(internal::is_same< Index, T >::value) &&Base::SizeAtCompileTime==1 &&internal::is_convertible< T, Scalar >::value, T * >::type *=0) |
void | _init1 (const Scalar *data) |
void | _init1 (const DenseBase< OtherDerived > &other) |
void | _init1 (const Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > &other) |
void | _init1 (const EigenBase< OtherDerived > &other) |
void | _init1 (const ReturnByValue< OtherDerived > &other) |
void | _init1 (const RotationBase< OtherDerived, ColsAtCompileTime > &r) |
void | _init1 (const Scalar &val0, typename internal::enable_if< Base::SizeAtCompileTime!=Dynamic &&Base::SizeAtCompileTime!=1 &&internal::is_convertible< T, Scalar >::value &&internal::is_same< typename internal::traits< Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > >::XprKind, ArrayXpr >::value, T >::type *=0) |
void | _init1 (const Index &val0, typename internal::enable_if<(!internal::is_same< Index, Scalar >::value) &&(internal::is_same< Index, T >::value) &&Base::SizeAtCompileTime!=Dynamic &&Base::SizeAtCompileTime!=1 &&internal::is_convertible< T, Scalar >::value &&internal::is_same< typename internal::traits< Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols > >::XprKind, ArrayXpr >::value, T * >::type *=0) |
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DenseBase () | |
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template<typename Derived , typename ExponentDerived > | |
const Eigen::CwiseBinaryOp< Eigen::internal::scalar_pow_op< typename Derived::Scalar, typename ExponentDerived::Scalar >, const Derived, const ExponentDerived > | pow (const Eigen::ArrayBase< Derived > &x, const Eigen::ArrayBase< ExponentDerived > &exponents) |
template<typename Derived , typename ScalarExponent > | |
const CwiseBinaryOp< internal::scalar_pow_op< Derived::Scalar, ScalarExponent >, Derived, Constant< ScalarExponent > > | pow (const Eigen::ArrayBase< Derived > &x, const ScalarExponent &exponent) |
template<typename Scalar , typename Derived > | |
const CwiseBinaryOp< internal::scalar_pow_op< Scalar, Derived::Scalar >, Constant< Scalar >, Derived > | pow (const Scalar &x, const Eigen::ArrayBase< Derived > &x) |
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template<typename Derived > | |
std::ostream & | operator<< (std::ostream &s, const DenseBase< Derived > &m) |
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Default constructor.
For fixed-size matrices, does nothing.
For dynamic-size matrices, creates an empty matrix of size 0. Does not allocate any array. Such a matrix is called a null matrix. This constructor is the unique way to create null matrices: resizing a matrix to 0 is not supported.
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Constructs a vector or row-vector with given dimension. This is only for vectors (either row-vectors or column-vectors), i.e. matrices which are known at compile-time to have either one row or one column.
Note that this is only useful for dynamic-size vectors. For fixed-size vectors, it is redundant to pass the dimension here, so it makes more sense to use the default constructor Array() instead.
Eigen::Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols >::Array | ( | const Scalar & | value | ) |
constructs an initialized 1x1 Array with the given coefficient
Eigen::Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols >::Array | ( | Index | rows, |
Index | cols | ||
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constructs an uninitialized array with rows rows and cols columns.
This is useful for dynamic-size arrays. For fixed-size arrays, it is redundant to pass these parameters, so one should use the default constructor Array() instead.
Eigen::Array< _Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols >::Array | ( | const Scalar & | val0, |
const Scalar & | val1 | ||
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constructs an initialized 2D vector with given coefficients
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constructs an initialized 3D vector with given coefficients
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constructs an initialized 4D vector with given coefficients
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Copy constructor
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This is an overloaded version of DenseCoeffsBase<Derived,ReadOnlyAccessors>::coeff(Index) const provided to by-pass the creation of an evaluator of the expression, thus saving compilation efforts.
See DenseCoeffsBase<Derived,ReadOnlyAccessors>::coeff(Index) const for details.
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This is an overloaded version of DenseCoeffsBase<Derived,ReadOnlyAccessors>::coeff(Index,Index) const provided to by-pass the creation of an evaluator of the expression, thus saving compilation efforts.
See DenseCoeffsBase<Derived,ReadOnlyAccessors>::coeff(Index) const for details.
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This is an overloaded version of DenseCoeffsBase<Derived,WriteAccessors>::coeffRef(Index) const provided to by-pass the creation of an evaluator of the expression, thus saving compilation efforts.
See DenseCoeffsBase<Derived,WriteAccessors>::coeffRef(Index) const for details.
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This is the const version of coeffRef(Index) which is thus synonym of coeff(Index). It is provided for convenience.
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This is an overloaded version of DenseCoeffsBase<Derived,WriteAccessors>::coeffRef(Index,Index) const provided to by-pass the creation of an evaluator of the expression, thus saving compilation efforts.
See DenseCoeffsBase<Derived,WriteAccessors>::coeffRef(Index,Index) const for details.
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This is the const version of coeffRef(Index,Index) which is thus synonym of coeff(Index,Index). It is provided for convenience.
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This is a special case of the templated operator=. Its purpose is to prevent a default operator= from hiding the templated operator=.
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Copies the value of the expression other into *this
with automatic resizing.
*this might be resized to match the dimensions of other. If *this was a null matrix (not already initialized), it will be initialized.
Note that copying a row-vector into a vector (and conversely) is allowed. The resizing, if any, is then done in the appropriate way so that row-vectors remain row-vectors and vectors remain vectors.
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The usage of using Base::operator=; fails on MSVC. Since the code below is working with GCC and MSVC, we skipped the usage of 'using'. This should be done only for operator=.
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Set all the entries to value.