C45 (Mallet 2 API)

java.lang.Object
- cc.mallet.classify.Classifier
- - cc.mallet.classify.C45

All Implemented Interfaces:

Boostable, AlphabetCarrying, java.io.Serializable
```
public class C45
extends Classifier
implements Boostable, java.io.Serializable
```
A C4.5 Decision Tree classifier.

Author:

Gary Huang ghuang@cs.umass.edu

See Also:

C45Trainer, Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class C45.Node

Field Summary
- Fields inherited from class cc.mallet.classify.Classifier
  instancePipe

Constructor Summary

Constructors
Constructor Description

C45(Pipe instancePipe, C45.Node root)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Classification`	`classify(Instance instance)`
`C45.Node`	`getRoot()`
`int`	`getSize()`
`void`	`print()`	Prints the tree
`void`	`prune()`	Prune the tree using minimum description length

Methods inherited from class cc.mallet.classify.Classifier
alphabetsMatch, classify, classify, classify, getAccuracy, getAlphabet, getAlphabets, getAverageRank, getF1, getF1, getF1, getFeatureSelection, getInstancePipe, getLabelAlphabet, getPerClassFeatureSelection, getPrecision, getPrecision, getPrecision, getRecall, getRecall, getRecall, print

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

- Constructor Detail
  - C45
```
public C45(Pipe instancePipe,
           C45.Node root)
```
- Method Detail
  - getRoot
```
public C45.Node getRoot()
```
  - classify
```
public Classification classify(Instance instance)
```
    Specified by:
    
    classify in class Classifier
  - prune
```
public void prune()
```
    Prune the tree using minimum description length
  - getSize
```
public int getSize()
```
    Returns:
    
    the total number of nodes in this tree
  - print
```
public void print()
```
    Prints the tree
    
    Overrides:
    
    print in class Classifier