Package com.singularsys.extensions.djep

Class DVariableTable

java.lang.Object

java.util.Observable

com.singularsys.jep.VariableTable

com.singularsys.extensions.xjep.XVariableTable

com.singularsys.extensions.djep.DVariableTable

All Implemented Interfaces:

JepComponent, java.io.Serializable

public class DVariableTable
extends XVariableTable

A VariableTable which works with partial derivatives of variables. Closely linked with DVariableFactory

Author:

Rich Morris Created on 23-Nov-2003

See Also:

Serialized Form

Field Summary

Fields inherited from class com.singularsys.jep.VariableTable

table, vf

Constructor Summary

Constructors

Constructor	Description
DVariableTable()

Method Summary

Modifier and Type	Method	Description
PartialDerivative	getPartialDeriv(java.lang.String name, java.lang.String[] dnames)	Gets the partial derivative of a variable.

Methods inherited from class com.singularsys.extensions.xjep.XVariableTable

init, newInstance, print

Methods inherited from class com.singularsys.jep.VariableTable

addConstant, addVariable, addVariable, clear, clearValues, containsKey, containsVariable, copyConstantsFrom, copyVariablesFrom, getLightWeightInstance, getVariable, getVariableFactory, getVariables, isEmpty, keySet, remove, remove, removeNonConstants, setVariableFactory, size, toString, values

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Constructor Detail

DVariableTable

public DVariableTable()

Method Detail

getPartialDeriv

public PartialDerivative getPartialDeriv(java.lang.String name,
                                         java.lang.String[] dnames)

Gets the partial derivative of a variable.

Parameters:

name - name of variable to find derivative of

dnames - array of names, ["x","y"] would give the derivative d/dxdy

Returns:

the derivative or null if it has not been calculated.