com.singularsys.extensions.statistical

Class Rank

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.functions.BinaryFunction

com.singularsys.extensions.statistical.Rank

All Implemented Interfaces:

JepComponent, PostfixMathCommandI, java.io.Serializable

public class Rank
extends BinaryFunction
implements JepComponent

PostfixMathCommand to return the rank of a single number in a list. Various conventions for calculating ranks can be used

Author:

rich

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Rank.Type Type of Rank to calculate.

Field Summary

Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand

curNumberOfParameters, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor and Description
Rank(Rank.Type type, boolean descending, FieldI f) Construct the rank function.

Method Summary

Modifier and Type	Method and Description
boolean	checkNumberOfParameters(int n) Checks the number of parameters of the function.
java.lang.Object	eval(java.lang.Object val, java.lang.Object data)
JepComponent	getLightWeightInstance() Gets a light-weight instance suitable for using in multiple threads.
void	init(Jep jep) Initialize the component.

Methods inherited from class com.singularsys.jep.functions.BinaryFunction

run

Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Rank

public Rank(Rank.Type type,
            boolean descending,
            FieldI f)

Construct the rank function.

Parameters:

type - Method used to calculate ranks, Type.COMPETITION is standard

descending - whether ranks are calculated in descending (standard) or ascending order.

f - field to use

Method Detail

checkNumberOfParameters

public boolean checkNumberOfParameters(int n)

Description copied from class: PostfixMathCommand

Checks the number of parameters of the function. Functions which set numberOfParameter=-1 should overload this method

Specified by:

checkNumberOfParameters in interface PostfixMathCommandI

Overrides:

checkNumberOfParameters in class PostfixMathCommand

Parameters:

n - number of parameters function will be called with.

Returns:

false if an illegal number of parameters is supplied, true otherwise.

eval

public java.lang.Object eval(java.lang.Object val,
                             java.lang.Object data)
                      throws EvaluationException

Specified by:

eval in class BinaryFunction

Throws:

EvaluationException

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 interface JepComponent

Parameters:

jep - the current Jep instance

getLightWeightInstance

public JepComponent getLightWeightInstance()

Description copied from interface: JepComponent

Gets a light-weight instance suitable for using in multiple threads.

Specified by:

getLightWeightInstance in interface JepComponent

Returns:

either an new instance, or 'this'.