Class MultiplyDiffRule
- java.lang.Object
-
- com.singularsys.extensions.djep.diffRules.MultiplyDiffRule
-
- All Implemented Interfaces:
DiffRulesI
,JepComponent
,java.io.Serializable
public class MultiplyDiffRule extends java.lang.Object implements DiffRulesI
Differentiates a product with respect to a variable. diff(y*z,x) -> diff(y,x)*z+y*diff(z,x)- Since:
- Extensions 1.0 now works when multiply has more than two arguments.
- See Also:
- Serialized Form
-
-
Constructor Summary
Constructors Constructor Description MultiplyDiffRule(DJep djep, Operator op)
MultiplyDiffRule(DJep djep, Operator mulop, Operator addop)
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method 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.JepComponent
getLightWeightInstance()
Returns nulljava.lang.String
getName()
Returns the name of the function.void
init(Jep jep)
Initialize the component.java.lang.String
toString()
Returns a string representation of the rule.
-
-
-
Method Detail
-
init
public void init(Jep jep)
Description copied from interface:JepComponent
Initialize the component. This methods is called whenever a component is added to Jep. Hence it allows components to keep track of the other components they may rely on.- Specified by:
init
in interfaceJepComponent
- Parameters:
jep
- the current Jep instance
-
getLightWeightInstance
public JepComponent getLightWeightInstance()
Returns null- Specified by:
getLightWeightInstance
in interfaceJepComponent
- Returns:
- either an new instance, null or 'this'.
-
toString
public java.lang.String toString()
Description copied from interface:DiffRulesI
Returns a string representation of the rule.- Specified by:
toString
in interfaceDiffRulesI
- Overrides:
toString
in classjava.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 interfaceDiffRulesI
-
differentiate
public Node differentiate(ASTFunNode node, java.lang.String var, Node[] children, Node[] dchildren) throws JepException
Description copied from interface:DiffRulesI
Returns the top node of of the derivative of this function wrt to variable var.- Specified by:
differentiate
in interfaceDiffRulesI
var
- The name of variable to differentiate wrt to.children
- the arguments of the functiondchildren
- 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
-
-