mfem::LpErrorEstimator Class Reference

The LpErrorEstimator class compares the solution to a known coefficient. More...

#include <estimators.hpp>

Inheritance diagram for mfem::LpErrorEstimator:

Collaboration diagram for mfem::LpErrorEstimator:

Public Member Functions
	LpErrorEstimator (int p, GridFunction &sol)
	Construct a new LpErrorEstimator object for a scalar field.
	LpErrorEstimator (int p, Coefficient &coef, GridFunction &sol)
	Construct a new LpErrorEstimator object for a scalar field.
	LpErrorEstimator (int p, VectorCoefficient &coef, GridFunction &sol)
	Construct a new LpErrorEstimator object for a vector field.
void	SetLocalErrorNormP (int p)
	Set the exponent, p, of the Lp norm used for computing the local element errors.
void	SetCoef (Coefficient &A)
void	SetCoef (VectorCoefficient &A)
void	Reset () override
	Reset the error estimator.
const Vector &	GetLocalErrors () override
	Get a Vector with all element errors.
virtual	~LpErrorEstimator ()
	Destructor.
Public Member Functions inherited from mfem::ErrorEstimator
virtual real_t	GetTotalError () const
	Return the total error from the last error estimate.
virtual	~ErrorEstimator ()
	Destruct the error estimator.
Public Member Functions inherited from mfem::AbstractErrorEstimator
virtual	~AbstractErrorEstimator ()

Protected Member Functions
bool	MeshIsModified ()
	Check if the mesh of the solution was modified.
void	ComputeEstimates ()
	Compute the element error estimates.

Protected Attributes
long	current_sequence
int	local_norm_p
Vector	error_estimates
real_t	total_error = 0.0
Coefficient *	coef
VectorCoefficient *	vcoef
GridFunction *	sol

Detailed Description

The LpErrorEstimator class compares the solution to a known coefficient.

This class can be used, for example, to adapt a mesh to a non-trivial initial condition in a time-dependent simulation. It can also be used to force refinement in the neighborhood of small features before switching to a more traditional error estimator.

The LpErrorEstimator supports either scalar or vector coefficients and works both in serial and in parallel.

Definition at line 448 of file estimators.hpp.

Constructor & Destructor Documentation

LpErrorEstimator() [1/3]

mfem::LpErrorEstimator::LpErrorEstimator ( int p, GridFunction & sol )

inline

Construct a new LpErrorEstimator object for a scalar field.

Parameters

p	Integer which selects which Lp norm to use.
sol	The GridFunction representation of the scalar field. Note: the coefficient must be set before use with the SetCoef method.

Definition at line 478 of file estimators.hpp.

LpErrorEstimator() [2/3]

mfem::LpErrorEstimator::LpErrorEstimator ( int p, Coefficient & coef, GridFunction & sol )

inline

Construct a new LpErrorEstimator object for a scalar field.

Parameters

p	Integer which selects which Lp norm to use.
coef	The scalar Coefficient to compare to the solution.
sol	The GridFunction representation of the scalar field.

Definition at line 487 of file estimators.hpp.

LpErrorEstimator() [3/3]

mfem::LpErrorEstimator::LpErrorEstimator ( int p, VectorCoefficient & coef, GridFunction & sol )

inline

Construct a new LpErrorEstimator object for a vector field.

Parameters

p	Integer which selects which Lp norm to use.
coef	The vector VectorCoefficient to compare to the solution.
sol	The GridFunction representation of the vector field.

Definition at line 496 of file estimators.hpp.

~LpErrorEstimator()

virtual mfem::LpErrorEstimator::~LpErrorEstimator ( )

inlinevirtual

Destructor.

Definition at line 518 of file estimators.hpp.

Member Function Documentation

ComputeEstimates()

void mfem::LpErrorEstimator::ComputeEstimates ( )

protected

Compute the element error estimates.

Definition at line 473 of file estimators.cpp.

GetLocalErrors()

const Vector & mfem::LpErrorEstimator::GetLocalErrors ( )

inlineoverridevirtual

Get a Vector with all element errors.

Implements mfem::ErrorEstimator.

Definition at line 511 of file estimators.hpp.

MeshIsModified()

bool mfem::LpErrorEstimator::MeshIsModified ( )

inlineprotected

Check if the mesh of the solution was modified.

Definition at line 462 of file estimators.hpp.

Reset()

void mfem::LpErrorEstimator::Reset ( )

inlineoverridevirtual

Reset the error estimator.

Implements mfem::ErrorEstimator.

Definition at line 508 of file estimators.hpp.

SetCoef() [1/2]

void mfem::LpErrorEstimator::SetCoef ( Coefficient & A )

inline

Definition at line 504 of file estimators.hpp.

SetCoef() [2/2]

void mfem::LpErrorEstimator::SetCoef ( VectorCoefficient & A )

inline

Definition at line 505 of file estimators.hpp.

SetLocalErrorNormP()

void mfem::LpErrorEstimator::SetLocalErrorNormP ( int p )

inline

Set the exponent, p, of the Lp norm used for computing the local element errors.

Definition at line 502 of file estimators.hpp.

Member Data Documentation

coef

Coefficient* mfem::LpErrorEstimator::coef

protected

Definition at line 457 of file estimators.hpp.

current_sequence

long mfem::LpErrorEstimator::current_sequence

protected

Definition at line 451 of file estimators.hpp.

error_estimates

Vector mfem::LpErrorEstimator::error_estimates

protected

Definition at line 453 of file estimators.hpp.

local_norm_p

int mfem::LpErrorEstimator::local_norm_p

protected

Definition at line 452 of file estimators.hpp.

sol

GridFunction* mfem::LpErrorEstimator::sol

protected

Definition at line 459 of file estimators.hpp.

total_error

real_t mfem::LpErrorEstimator::total_error = 0.0

protected

Definition at line 455 of file estimators.hpp.

vcoef

VectorCoefficient* mfem::LpErrorEstimator::vcoef

protected

Definition at line 458 of file estimators.hpp.

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The documentation for this class was generated from the following files:

• fem/estimators.hpp
• fem/estimators.cpp