MultiMeshFunction

class dolfin.functions.multimeshfunction.MultiMeshFunction(*args, **kwargs)

Bases: ufl.coefficient.Coefficient, dolfin.cpp.function.MultiMeshFunction

This class represents a multimeshfunction \(u_h=(u_{h,1}\cross \dots u_{h,N}\) in a finite element multimeshfunction space \(V_h=V_{h,1}\cross \dots V_{h,N}\), given by

\[u_{h,j}= \sum_{i=1}^n U_i \phi_{i,j},\]

where \(\{\phi_{i,j}\}_{i=1}^n\) is a basis for \(V_{h,j}\), and \(U\) is a vector of expansion coefficients for \(u_h\).

Arguments

There is a maximum of two arguments. The first argument must be a :py:class:`MultiMeshFunctionSpace

<dolfin.cpp.function.MultiMeshFunctionSpace>`.

The second argument must be a GenericVector and is intended for library use only.

Examples

Create a MultiMeshFunction:

• from a MultiMeshFunctionSpace V

  f = MultiMeshFunction(V)
  

• from a MultiMeshFunctionSpace V and a GenericVector v

  Warning: this constructor is intended for internal libray use only.

  g = MultiMeshFunction(V, v)
  

Initialize MultiMeshFunction.

assign(rhs)

Parameters:

rhs: A dolfin.MultiMeshFunction

function_space()

interpolate(v)

Interpolate function.

Arguments

v

a MultiMeshFunction or an :py:class:`Expression <dolfin.functions.expression.Expression’>

Example of usage

V = MultiMeshFunctionSpace(multimesh, "Lagrange", 1)
v = MultiMeshFunction(V)
w = Expression("sin(pi*x[0])")
v.interpolate(w)

part(i, deepcopy=False)

parts(deepcopy=False)

Generator for MultiMeshFunction