org.lsmp.djep.djep.diffRules

Class PassThroughDiffRule

java.lang.Object

org.lsmp.djep.djep.diffRules.PassThroughDiffRule

All Implemented Interfaces:

DiffRulesI

public class PassThroughDiffRule
extends java.lang.Object
implements DiffRulesI

Rules like Sum where diff(sum(a,b,c),x) -> sum(da/dx,db/dx,dc/dx) are instance of this class.

Constructor Summary

Constructors

Constructor and Description
PassThroughDiffRule(DJep djep, java.lang.String inName)
PassThroughDiffRule(java.lang.String inName, PostfixMathCommandI inPfmc)

Method Summary

Methods

Modifier and Type	Method and Description
Node	differentiate(ASTFunNode node, java.lang.String var, Node[] children, Node[] dchildren, DJep djep) Returns the top node of of the derivative of this function wrt to variable var.
java.lang.String	getName() Returns the name of the function.
java.lang.String	toString() Returns a string representation of the rule.

Methods inherited from class java.lang.Object

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

Constructor Detail

PassThroughDiffRule

public PassThroughDiffRule(DJep djep,
                   java.lang.String inName)

PassThroughDiffRule

public PassThroughDiffRule(java.lang.String inName,
                   PostfixMathCommandI inPfmc)

Method Detail

toString

public java.lang.String toString()

Description copied from interface: DiffRulesI

Returns a string representation of the rule.

Specified by:

toString in interface DiffRulesI

Overrides:

toString in class java.lang.Object

getName

public java.lang.String getName()

Description copied from interface: DiffRulesI

Returns the name of the function. Used as index in hashtable and as way of linking with standard JEP functions. You probably want to specify the in the constructors.

Specified by:

getName in interface DiffRulesI

differentiate

public Node differentiate(ASTFunNode node,
                 java.lang.String var,
                 Node[] children,
                 Node[] dchildren,
                 DJep djep)
                   throws ParseException

Description copied from interface: DiffRulesI

Returns the top node of of the derivative of this function wrt to variable var.

Specified by:

differentiate in interface DiffRulesI

var - The name of variable to differentiate wrt to.

children - the arguments of the function

dchildren - the derivatives of each argument of the function.

Returns:

top node of and expression tree for the derivative.

Throws:

ParseException - if there is some problem in compiling the derivative.