com.singularsys.extensions.djep

Interface DiffRulesI

All Superinterfaces:

JepComponent, java.io.Serializable

All Known Implementing Classes:

ChainRuleDiffRules, DivideDiffRule, IfDiffRule, MacroDiffRules, MacroFunctionDiffRules, MultiplyDiffRule, PassThroughDiffRule, PowerDiffRule, ZeroDiffRule

public interface DiffRulesI
extends JepComponent

Defines a set of rules describing how to differentiate a function. Each function to be differentiated should have a object which implements this interface.

Method Summary

Modifier and Type	Method and Description
Node	differentiate(ASTFunNode node, java.lang.String var, Node[] children, Node[] dchildren) 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 interface com.singularsys.jep.JepComponent

getLightWeightInstance, init

Method Detail

differentiate

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

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

Parameters:

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.

JepException

toString

java.lang.String toString()

Returns a string representation of the rule.

Overrides:

toString in class java.lang.Object

getName

java.lang.String getName()

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.