Package weka.classifiers.rules

Class DecisionTableHashKey

java.lang.Object

weka.classifiers.rules.DecisionTableHashKey

All Implemented Interfaces:

Serializable, RevisionHandler

public class DecisionTableHashKey
extends Object
implements Serializable, RevisionHandler

Class providing hash table keys for DecisionTable

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
DecisionTableHashKey(double[] t)	Constructor for a hashKey
DecisionTableHashKey(Instance t, int numAtts, boolean ignoreClass)	Constructor for a hashKey

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object b)	Tests if two instances are equal
String	getRevision()	Returns the revision string.
int	hashCode()	Calculates a hash code
void	print_hash_code()	Prints the hash code
String	toString(Instances t, int maxColWidth)	Convert a hash entry to a string

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DecisionTableHashKey

public DecisionTableHashKey(Instance t,
 int numAtts,
 boolean ignoreClass)
                     throws Exception

Constructor for a hashKey

Parameters:

t - an instance from which to generate a key

numAtts - the number of attributes

ignoreClass - if true treat the class as a normal attribute

Throws:

Exception - if something goes wrong

DecisionTableHashKey

public DecisionTableHashKey(double[] t)

Constructor for a hashKey

Parameters:

t - an array of feature values

Method Details

toString

public String toString(Instances t,
 int maxColWidth)

Convert a hash entry to a string

Parameters:

t - the set of instances

maxColWidth - width to make the fields

Returns:

string representation of the hash entry

hashCode

public int hashCode()

Calculates a hash code

Overrides:

hashCode in class Object

Returns:

the hash code as an integer

equals

public boolean equals(Object b)

Tests if two instances are equal

Overrides:

equals in class Object

Parameters:

b - a key to compare with

Returns:

true if both objects are equal

print_hash_code

public void print_hash_code()

Prints the hash code

getRevision

public String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Returns:

the revision