DiscreteFunction (weka-stable 3.6.14 API)

java.lang.Object
- weka.classifiers.functions.pace.DiscreteFunction

All Implemented Interfaces:

RevisionHandler
```
public class DiscreteFunction
extends Object
implements RevisionHandler
```
Class for handling discrete functions.
A discrete function here is one that takes non-zero values over a finite set of points.

Version:

$Revision: 1.4 $

Author:

Yong Wang (yongwang@cs.waikato.ac.nz)

Constructor Summary

Constructors
Constructor and Description
`DiscreteFunction()` Constructs an empty discrete function
`DiscreteFunction(DoubleVector p)` Constructs a discrete function with the point values provides and the function values are all 1/n.
`DiscreteFunction(DoubleVector p, DoubleVector v)` Constructs a discrete function with both the point values and function values provided.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Object`	`clone()` Clones the discrete function
`double`	`getFunctionValue(int i)` Gets a particular function value
`double`	`getPointValue(int i)` Gets a particular point value
`String`	`getRevision()` Returns the revision string.
`boolean`	`isEmpty()` Returns true if it is empty.
`static void`	`main(String[] args)`
`DiscreteFunction`	`normalize()` Normalizes the function values with L1-norm.
`DiscreteFunction`	`plus(DiscreteFunction d)` Returns the combined of two discrete functions
`DiscreteFunction`	`plusEquals(DiscreteFunction d)` Returns the combined of two discrete functions.
`void`	`setFunctionValue(int i, double v)` Sets a particular function value
`void`	`setPointValue(int i, double p)` Sets a particular point value
`int`	`size()` Returns the size of the point set.
`void`	`sort()` Sorts the point values of the discrete function.
`DiscreteFunction`	`timesEquals(double x)` All function values are multiplied by a double
`String`	`toString()` Converts the discrete function to string.
`DiscreteFunction`	`unique()` Makes each individual point value unique

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - DiscreteFunction
```
public DiscreteFunction()
```
    Constructs an empty discrete function
  - DiscreteFunction
```
public DiscreteFunction(DoubleVector p)
```
    Constructs a discrete function with the point values provides and the function values are all 1/n.
    
    Parameters:
    
    p - the point values
  - DiscreteFunction
```
public DiscreteFunction(DoubleVector p,
                        DoubleVector v)
```
    Constructs a discrete function with both the point values and function values provided.
    
    Parameters:
    
    p - the point values
    
    v - the function values
- Method Detail
  - normalize
```
public DiscreteFunction normalize()
```
    Normalizes the function values with L1-norm.
  - sort
```
public void sort()
```
    Sorts the point values of the discrete function.
  - clone
```
public Object clone()
```
    Clones the discrete function
    
    Overrides:
    
    clone in class Object
  - unique
```
public DiscreteFunction unique()
```
    Makes each individual point value unique
  - size
```
public int size()
```
    Returns the size of the point set.
  - getPointValue
```
public double getPointValue(int i)
```
    Gets a particular point value
    
    Parameters:
    
    i - the index
  - getFunctionValue
```
public double getFunctionValue(int i)
```
    Gets a particular function value
    
    Parameters:
    
    i - the index
  - setPointValue
```
public void setPointValue(int i,
                          double p)
```
    Sets a particular point value
    
    Parameters:
    
    i - the index
  - setFunctionValue
```
public void setFunctionValue(int i,
                             double v)
```
    Sets a particular function value
    
    Parameters:
    
    i - the index
  - isEmpty
```
public boolean isEmpty()
```
    Returns true if it is empty.
  - plus
```
public DiscreteFunction plus(DiscreteFunction d)
```
    Returns the combined of two discrete functions
    
    Parameters:
    
    d - the second discrete function
    
    Returns:
    
    the combined discrte function
  - plusEquals
```
public DiscreteFunction plusEquals(DiscreteFunction d)
```
    Returns the combined of two discrete functions. The first function is replaced with the new one.
    
    Parameters:
    
    d - the second discrete function
    
    Returns:
    
    the combined discrte function
  - timesEquals
```
public DiscreteFunction timesEquals(double x)
```
    All function values are multiplied by a double
    
    Parameters:
    
    x - the multiplier
  - toString
```
public String toString()
```
    Converts the discrete function to string.
    
    Overrides:
    
    toString in class Object
  - getRevision
```
public String getRevision()
```
    Returns the revision string.
    
    Specified by:
    
    getRevision in interface RevisionHandler
    
    Returns:
    
    the revision
  - main
```
public static void main(String[] args)
```

Class DiscreteFunction

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

DiscreteFunction

DiscreteFunction

DiscreteFunction

Method Detail

normalize

sort

clone

unique

size

getPointValue

getFunctionValue

setPointValue

setFunctionValue

isEmpty

plus

plusEquals

timesEquals

toString

getRevision

main