Eigen  3.3.7
List of all members | Public Member Functions | Protected Member Functions
Eigen::SparseCompressedBase< Derived > Class Template Reference
Sparse linear algebra » Reference » SparseCore module

Detailed Description

template<typename Derived>
class Eigen::SparseCompressedBase< Derived >

Common base class for sparse [compressed]-{row|column}-storage format.

This class defines the common interface for all derived classes implementing the compressed sparse storage format, such as:

+ Inheritance diagram for Eigen::SparseCompressedBase< Derived >:

Public Member Functions

Map< Array< Scalar, Dynamic, 1 > > coeffs ()
 
const Map< const Array< Scalar, Dynamic, 1 > > coeffs () const
 
StorageIndex * innerIndexPtr ()
 
const StorageIndex * innerIndexPtr () const
 
StorageIndex * innerNonZeroPtr ()
 
const StorageIndex * innerNonZeroPtr () const
 
bool isCompressed () const
 
Index nonZeros () const
 
StorageIndex * outerIndexPtr ()
 
const StorageIndex * outerIndexPtr () const
 
Scalar * valuePtr ()
 
const Scalar * valuePtr () const
 

Protected Member Functions

 SparseCompressedBase ()
 

Constructor & Destructor Documentation

◆ SparseCompressedBase()

template<typename Derived >
Eigen::SparseCompressedBase< Derived >::SparseCompressedBase ( )
inlineprotected

Default constructor. Do nothing.

Member Function Documentation

◆ coeffs() [1/2]

template<typename Derived >
Map<Array<Scalar,Dynamic,1> > Eigen::SparseCompressedBase< Derived >::coeffs ( )
inline
Returns
a read-write view of the stored coefficients as a 1D array expression
Warning
this method is for compressed storage only, and it will trigger an assertion otherwise.

Here is an example:

SparseMatrix<double> A(3,3);
A.insert(1,2) = 0;
A.insert(0,1) = 1;
A.insert(2,0) = 2;
A.makeCompressed();
cout << "The matrix A is:" << endl << MatrixXd(A) << endl;
cout << "it has " << A.nonZeros() << " stored non zero coefficients that are: " << A.coeffs().transpose() << endl;
A.coeffs() += 10;
cout << "After adding 10 to every stored non zero coefficient, the matrix A is:" << endl << MatrixXd(A) << endl;

and the output is:

The matrix A is:
0 1 0
0 0 0
2 0 0
it has 3 stored non zero coefficients that are: 2 1 0
After adding 10 to every stored non zero coefficient, the matrix A is:
0 11 0
0 0 10
12 0 0
See also
valuePtr(), isCompressed()

◆ coeffs() [2/2]

template<typename Derived >
const Map<const Array<Scalar,Dynamic,1> > Eigen::SparseCompressedBase< Derived >::coeffs ( ) const
inline
Returns
a read-only view of the stored coefficients as a 1D array expression.
Warning
this method is for compressed storage only, and it will trigger an assertion otherwise.
See also
valuePtr(), isCompressed()

◆ innerIndexPtr() [1/2]

template<typename Derived >
StorageIndex* Eigen::SparseCompressedBase< Derived >::innerIndexPtr ( )
inline
Returns
a non-const pointer to the array of inner indices. This function is aimed at interoperability with other libraries.
See also
valuePtr(), outerIndexPtr()

◆ innerIndexPtr() [2/2]

template<typename Derived >
const StorageIndex* Eigen::SparseCompressedBase< Derived >::innerIndexPtr ( ) const
inline
Returns
a const pointer to the array of inner indices. This function is aimed at interoperability with other libraries.
See also
valuePtr(), outerIndexPtr()

◆ innerNonZeroPtr() [1/2]

template<typename Derived >
StorageIndex* Eigen::SparseCompressedBase< Derived >::innerNonZeroPtr ( )
inline
Returns
a non-const pointer to the array of the number of non zeros of the inner vectors. This function is aimed at interoperability with other libraries.
Warning
it returns the null pointer 0 in compressed mode

◆ innerNonZeroPtr() [2/2]

template<typename Derived >
const StorageIndex* Eigen::SparseCompressedBase< Derived >::innerNonZeroPtr ( ) const
inline
Returns
a const pointer to the array of the number of non zeros of the inner vectors. This function is aimed at interoperability with other libraries.
Warning
it returns the null pointer 0 in compressed mode

◆ isCompressed()

template<typename Derived >
bool Eigen::SparseCompressedBase< Derived >::isCompressed ( ) const
inline
Returns
whether *this is in compressed form.

◆ nonZeros()

template<typename Derived >
Index Eigen::SparseCompressedBase< Derived >::nonZeros ( ) const
inline
Returns
the number of non zero coefficients

◆ outerIndexPtr() [1/2]

template<typename Derived >
StorageIndex* Eigen::SparseCompressedBase< Derived >::outerIndexPtr ( )
inline
Returns
a non-const pointer to the array of the starting positions of the inner vectors. This function is aimed at interoperability with other libraries.
Warning
it returns the null pointer 0 for SparseVector
See also
valuePtr(), innerIndexPtr()

◆ outerIndexPtr() [2/2]

template<typename Derived >
const StorageIndex* Eigen::SparseCompressedBase< Derived >::outerIndexPtr ( ) const
inline
Returns
a const pointer to the array of the starting positions of the inner vectors. This function is aimed at interoperability with other libraries.
Warning
it returns the null pointer 0 for SparseVector
See also
valuePtr(), innerIndexPtr()

◆ valuePtr() [1/2]

template<typename Derived >
Scalar* Eigen::SparseCompressedBase< Derived >::valuePtr ( )
inline
Returns
a non-const pointer to the array of values. This function is aimed at interoperability with other libraries.
See also
innerIndexPtr(), outerIndexPtr()

◆ valuePtr() [2/2]

template<typename Derived >
const Scalar* Eigen::SparseCompressedBase< Derived >::valuePtr ( ) const
inline
Returns
a const pointer to the array of values. This function is aimed at interoperability with other libraries.
See also
innerIndexPtr(), outerIndexPtr()
The documentation for this class was generated from the following file: