com.singularsys.extensions.matrixdiff

Class MatrixDifferentiationVisitor

java.lang.Object

com.singularsys.jep.walkers.DoNothingVisitor

com.singularsys.jep.walkers.DeepCopyVisitor

com.singularsys.extensions.djep.DifferentiationVisitor

com.singularsys.extensions.matrixdiff.MatrixDifferentiationVisitor

All Implemented Interfaces:

JepComponent, ParserVisitor, java.io.Serializable

public class MatrixDifferentiationVisitor
extends DifferentiationVisitor

A DifferentationVisitor 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.DoNothingVisitor

ft, jep, nf, ot, vt

Constructor Summary

Constructors

Constructor and Description
MatrixDifferentiationVisitor(MatrixFactoryI mfact)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	visit(ASTConstant node, java.lang.Object 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.DeepCopyVisitor

deepCopy

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

childrenHaveChanged, copyChildrenIfNeeded, getFunctionTable, getLightWeightInstance, getNodeFactory, getOperatorTable, getVariableTable, visit, visitChildren, visitNode

Methods inherited from class java.lang.Object

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

Constructor Detail

MatrixDifferentiationVisitor

public MatrixDifferentiationVisitor(MatrixFactoryI mfact)

Method Detail

visit

public java.lang.Object visit(ASTConstant node,
                              java.lang.Object data)
                       throws ParseException

Description copied from class: DifferentiationVisitor

Differentiates a constant.

Specified by:

visit in interface ParserVisitor

Overrides:

visit in class DifferentiationVisitor

Returns:

0 derivatives of constants are always zero.

Throws:

ParseException