dolfin.fem.projection¶

Projections of a Function or an Expression onto a finite element space.

Functions

project(v[, V, bcs, mesh, funct])

Return projection of given expression v onto the finite element space V.

dolfin.fem.projection.project(v, V=None, bcs=[], mesh=None, funct=None)[source]¶

Return projection of given expression v onto the finite element space V.

Arguments

v: a Function or an Expression
bcs: Optional argument list of DirichletBC
V: Optional argument FunctionSpace
mesh: Optional argument mesh.
funct: Target function where result is stored.

Example of usage

v = Expression("sin(pi*x[0])")
V = FunctionSpace(mesh, "Lagrange", 1)
Pv = project(v, V)
This is useful for post-processing functions or expressions which are not readily handled by visualization tools (such as for example discontinuous functions).