Expression of a non-sequential sub-matrix defined by arbitrary sequences of row and column indices.
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template<typename XprType, typename RowIndices, typename ColIndices>
class Eigen::IndexedView< XprType, RowIndices, ColIndices >
Expression of a non-sequential sub-matrix defined by arbitrary sequences of row and column indices.
- Template Parameters
-
| XprType | the type of the expression in which we are taking the intersections of sub-rows and sub-columns |
| RowIndices | the type of the object defining the sequence of row indices |
| ColIndices | the type of the object defining the sequence of column indices |
This class represents an expression of a sub-matrix (or sub-vector) defined as the intersection of sub-sets of rows and columns, that are themself defined by generic sequences of row indices \( \{r_0,r_1,..r_{m-1}\} \) and column indices \( \{c_0,c_1,..c_{n-1} \}\). Let \( A \) be the nested matrix, then the resulting matrix \( B \) has m rows and n columns, and its entries are given by: \( B(i,j) = A(r_i,c_j) \).
The RowIndices and ColIndices types must be compatible with the following API:
Scalar Scalar int size
Definition: benchVecAdd.cpp:17
EIGEN_DEFAULT_DENSE_INDEX_TYPE Index
The Index type as used for the API.
Definition: Meta.h:83
type
Definition: compute_granudrum_aor.py:141
Typical supported types thus include:
- std::vector<int>
- std::valarray<int>
- std::array<int>
- Eigen::ArrayXi
- decltype(ArrayXi::LinSpaced(...))
- Any view/expressions of the previous types
- Eigen::ArithmeticSequence
- Eigen::internal::AllRange (helper for Eigen::placeholders::all)
- Eigen::internal::SingleRange (helper for single index)
- etc.
In typical usages of Eigen, this class should never be used directly. It is the return type of DenseBase::operator()(const RowIndices&, const ColIndices&).
- See also
- class Block
Inheritance diagram for Eigen::IndexedView< XprType, RowIndices, ColIndices >:
1.9.1 