dolfinx.cpp.function

Function module

Classes

Constant(self, arg0, arg1)	A value constant with respect to integration domain
Expression(self, coefficients, constants, …)	An Expression
Function(*args, **kwargs)	A finite element function
FunctionSpace(self, arg0, arg1, arg2)

class dolfinx.cpp.function.Constant(self: dolfinx.cpp.function.Constant, arg0: List[int], arg1: List[float]) → None

Bases: pybind11_builtins.pybind11_object

A value constant with respect to integration domain

Create a constant from a scalar value array

value(self: dolfinx.cpp.function.Constant) → numpy.ndarray

class dolfinx.cpp.function.Expression(self: dolfinx.cpp.function.Expression, coefficients: List[dolfinx.cpp.function.Function], constants: List[dolfinx.cpp.function.Constant], mesh: dolfinx::mesh::Mesh, x: numpy.ndarray[numpy.float64[m, n], flags.c_contiguous], fn: object, value_size: int) → None

Bases: pybind11_builtins.pybind11_object

An Expression

eval(self: dolfinx.cpp.function.Expression, arg0: List[int], arg1: numpy.ndarray[numpy.float64[m, n], flags.writeable, flags.c_contiguous]) → None

property mesh

property num_points

property value_size

property x

class dolfinx.cpp.function.Function(*args, **kwargs)

Bases: pybind11_builtins.pybind11_object

A finite element function

Overloaded function.

1. __init__(self: dolfinx.cpp.function.Function, arg0: dolfinx::function::FunctionSpace) -> None

Create a function on the given function space

2. __init__(self: dolfinx.cpp.function.Function, arg0: dolfinx::function::FunctionSpace, arg1: dolfinx::la::Vector<double>) -> None

collapse(self: dolfinx.cpp.function.Function) → dolfinx.cpp.function.Function

Collapse sub-function view

compute_point_values(self: dolfinx.cpp.function.Function) → numpy.ndarray[numpy.float64[m, n]]

Compute values at all mesh points

eval(self: dolfinx.cpp.function.Function, x: numpy.ndarray[numpy.float64[m, 3], flags.c_contiguous], cells: numpy.ndarray[numpy.int32[m, 1]], values: numpy.ndarray[numpy.float64[m, n], flags.writeable, flags.c_contiguous]) → None

Evaluate Function

property function_space

property id

interpolate(*args, **kwargs)

Overloaded function.

1. interpolate(self: dolfinx.cpp.function.Function, f: Callable[[numpy.ndarray[numpy.float64[3, n], flags.c_contiguous]], numpy.ndarray[numpy.float64[m, n]]]) -> None

Interpolate an expression

2. interpolate(self: dolfinx.cpp.function.Function, u: dolfinx.cpp.function.Function) -> None

Interpolate a finite element function

interpolate_ptr(self: dolfinx.cpp.function.Function, arg0: int) → None

Interpolate using a pointer to an expression with a C signature

property name

sub(self: dolfinx.cpp.function.Function, arg0: int) → dolfinx.cpp.function.Function

Return sub-function (view into parent Function

property vector

Return the vector associated with the finite element Function

property x

Return the vector associated with the finite element Function

class dolfinx.cpp.function.FunctionSpace(self: dolfinx.cpp.function.FunctionSpace, arg0: dolfinx::mesh::Mesh, arg1: dolfinx::fem::FiniteElement, arg2: dolfinx::fem::DofMap) → None

Bases: pybind11_builtins.pybind11_object

collapse(self: dolfinx.cpp.function.FunctionSpace) → Tuple[dolfinx.cpp.function.FunctionSpace, List[int]]

component(self: dolfinx.cpp.function.FunctionSpace) → List[int]

contains(self: dolfinx.cpp.function.FunctionSpace, arg0: dolfinx.cpp.function.FunctionSpace) → bool

property dim

property dofmap

property element

property id

property mesh

sub(self: dolfinx.cpp.function.FunctionSpace, arg0: List[int]) → dolfinx.cpp.function.FunctionSpace

tabulate_dof_coordinates(self: dolfinx.cpp.function.FunctionSpace) → numpy.ndarray[numpy.float64[m, 3]]