Package com.singularsys.extensions.matrixdiff

Class MatrixDifferentiationVisitor

java.lang.Object

com.singularsys.jep.walkers.GenericDoNothingVisitor<String>

com.singularsys.jep.walkers.GenericDeepCopyVisitor<String>

com.singularsys.extensions.djep.DifferentiationVisitor

com.singularsys.extensions.matrixdiff.MatrixDifferentiationVisitor

All Implemented Interfaces:

GenericVisitor<Node,String,ParseException>, JepComponent, Serializable

public class MatrixDifferentiationVisitor
extends DifferentiationVisitor

A DifferentiationVisitor which knows about vectors and matrices. In particular, it knows the derivative of a constant matrix is the zero matrix. It only works with the vector and matrix functions of a real variables and not the advanced case of functions of vector and matrix variables.

See Also:

• Serialized Form

Field Summary

Fields inherited from class com.singularsys.extensions.djep.DifferentiationVisitor

djep, tu

Fields inherited from class com.singularsys.jep.walkers.GenericDoNothingVisitor

ft, nf, ot

Constructor Summary

Constructors

Constructor	Description
MatrixDifferentiationVisitor(MatrixFactoryI mfact)

Method Summary

Modifier and Type	Method	Description
Node	visit(ASTConstant node, String data)	Differentiates a constant.

Methods inherited from class com.singularsys.extensions.djep.DifferentiationVisitor

differentiate, getDiffRule, init, isConstantVar, printDiffRules, printDiffRules, visit, visit, visit

Methods inherited from class com.singularsys.jep.walkers.GenericDeepCopyVisitor

getLightWeightInstance, visit

Methods inherited from class com.singularsys.jep.walkers.GenericDoNothingVisitor

childrenHaveChanged, copyChildrenIfNeeded, copyChildrenIfNeeded, makeException

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.singularsys.jep.GenericVisitor

makeException, visitChildren

Constructor Details

MatrixDifferentiationVisitor

public MatrixDifferentiationVisitor(MatrixFactoryI mfact)

Method Details

visit

public Node visit(ASTConstant node,
 String data)
           throws ParseException

Description copied from class: DifferentiationVisitor

Differentiates a constant.

Specified by:

visit in interface GenericVisitor<Node,String,ParseException>

Overrides:

visit in class DifferentiationVisitor

Parameters:

node - current node

data - context data

Returns:

0 derivatives of constants are always zero.

Throws:

ParseException