NOX::EpetraNew::Scaling Class Reference

Object to control scaling of a linear system. More...

#include <NOX_EpetraNew_Scaling.H>

Collaboration diagram for NOX::EpetraNew::Scaling:

[legend]List of all members.

Public Types
enum	SourceType { None, RowSum, UserDefined }
	Describes where the scaling vector comes from.
enum	ScaleType { Left, Right }
	Describes the type of scaling to apply.
Public Member Functions
	Scaling ()
	Constructor.
virtual	~Scaling ()
	Virtual destructor.
virtual void	addUserScaling (ScaleType type, Epetra_Vector &D)
	Add a user supplied diagonal scale vector to the scaling object.
virtual void	addRowSumScaling (ScaleType type, Epetra_Vector &D)
	Add "Row Sum" scaling to the scaling object. The supplied vector is used to store the current row sum vector.
virtual void	computeScaling (const Epetra_LinearProblem &problem)
	Computes Row Sum scaling diagonal vectors. Only needs to be called if a row sum scaling has been rewuested.
virtual void	scaleLinearSystem (Epetra_LinearProblem &problem)
	Scales the linear system.
virtual void	unscaleLinearSystem (Epetra_LinearProblem &problem)
	Remove the scaling from the linear system.
virtual void	applyRightScaling (const Epetra_Vector &input, Epetra_Vector &result)
	Applies any RIGHT scaling vectors to an input vector.
virtual void	applyLeftScaling (const Epetra_Vector &input, Epetra_Vector &result)
	Applies any LEFT scaling vectors to an input vector.
virtual void	print (ostream &os)
	Printing.

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Detailed Description

Object to control scaling of a linear system.

Scaling of the linear system can affect the Nonlinear solves if using an inexact Newton method. We must account for computed norms.

Currently this assumes a diagonal scaling only! Once epetra can do matrix-matrix multiplies we will expand this class.

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

• NOX_EpetraNew_Scaling.H
• NOX_EpetraNew_Scaling.C

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