EigenVector¶

class dolfin.cpp.la.EigenVector(*args)¶

Bases: dolfin.cpp.la.GenericVector

This class provides a simple vector class based on Eigen. It is a simple wrapper for a Eigen vector implementing the GenericVector interface. The interface is intentionally simple. For advanced usage, access the underlying Eigen vector and use the standard Eigen interface which is documented at http://eigen.tuxfamily.org

Construct vector from an Eigen shared_ptr.

Parameters:	Eigen::VectorXd > x (std::shared_ptr<) –

add_local()¶

Add block of values using local indices.

Parameters:	*double block** (const) – m (std::size_t) – *dolfin::la_index rows** (const) –
Return type:	void

data(deepcopy=True)¶

Return an array to underlaying data

This method is only available for the Eigen linear algebra backend.

Arguments

deepcopy: Return a copy of the data. If set to False a reference to the Matrix need to be kept, otherwise the data will be destroyed together with the destruction of the Matrix

gather()¶

Gather entries into local vector x.

Parameters:	& x (GenericVector) – std::vector< dolfin::la_index > & indices (const) –
Return type:	void

get_local()¶

Get block of values using local indices.

Parameters:	* block (double) – m (std::size_t) – *dolfin::la_index rows** (const) –
Return type:	void

init()¶

Resize vector with given ownership range and with ghost values.

Parameters:	std::size_t, std::size_t > range (std::pair<) – std::vector< std::size_t > & local_to_global_map (const) – std::vector< la_index > & ghost_indices (const) –
Return type:	void

resize()¶

Resize vector to size N.

Parameters:	N (std::size_t) –
Return type:	void

set_local()¶

Set block of values using local indices.

Parameters:	*double block** (const) – m (std::size_t) – *dolfin::la_index rows** (const) –
Return type:	void

sum()¶

Return sum of values of vector.

Return type:	double

thisown¶: The membership flag

vec()¶

Return reference to Eigen vector (const version)

Return type:	std::shared_ptr< const Eigen::VectorXd >