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

Overloaded versions

• EigenVector()

  Create empty vector

• EigenVector(N)

  Create vector of size N

• EigenVector(x)

  Copy constructor

• EigenVector(x)

  Construct vector from an Eigen shared_ptr

add_local()

Overloaded versions

• add_local(block, m, rows)

  Add block of values using local indices

• add_local(values)

  Add values to each entry on local process

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()

Overloaded versions

• gather(x, indices)

  Gather entries into local vector x

• gather(x, indices)

  Gather entries into x

get_local()

Overloaded versions

• get_local(block, m, rows)

  Get block of values using local indices

• get_local(values)

  Get all values on local process

init()

Overloaded versions

• init(comm, N)

  Initialize vector to size N

• init(comm, range)

  Resize vector with given ownership range

• init(comm, range, local_to_global_map, ghost_indices)

  Resize vector with given ownership range and with ghost values

resize()

Resize vector to size N

set_local()

Overloaded versions

• set_local(block, m, rows)

  Set block of values using local indices

• set_local(values)

  Set all values on local process

sum()

Overloaded versions

• sum()

  Return sum of values of vector

• sum(rows)

  Return sum of selected rows in vector. Repeated entries are only summed once.

thisown None

The membership flag

vec()

Overloaded versions

• vec()

  Return reference to Eigen vector (const version)

• vec()

  Return reference to Eigen vector (non-const version)