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Class weka.classifiers.adtree.Splitter
java.lang.Object
|
+----weka.classifiers.adtree.Splitter
- public abstract class Splitter
- extends java.lang.Object
- implements java.io.Serializable, java.lang.Cloneable
Abstract class representing a splitter node in an alternating tree.
- Version:
- $Revision: 1.1 $
- Author:
- Richard Kirkby (rkirkby@cs.waikato.ac.nz)
orderAdded- The number this node was in the order of nodes added to the tree
Splitter()
-
attributeString(Instances)
- Gets the string describing the attributes the split depends on.
branchInstanceGoesDown(Instance)
- Gets the index of the branch that an instance applies to.
clone()
- Clones this node.
comparisonString(int, Instances)
- Gets the string describing the comparision the split depends on for a particular
branch.
equalTo(Splitter)
- Tests whether two splitters are equivalent.
getChildForBranch(int)
- Gets the child for a branch of the split.
getNumOfBranches()
- Gets the number of branches of the split.
instancesDownBranch(int, Instances)
- Gets the subset of instances that apply to a particluar branch of the split.
setChildForBranch(int, PredictionNode)
- Sets the child for a branch of the split.
orderAdded
public int orderAdded
The number this node was in the order of nodes added to the tree
Splitter
public Splitter()
getNumOfBranches
public abstract int getNumOfBranches()
Gets the number of branches of the split.
- Returns:
- the number of branches
branchInstanceGoesDown
public abstract int branchInstanceGoesDown(Instance i)
Gets the index of the branch that an instance applies to. Returns -1 if no branches
apply.
- Parameters:
i
- the instance
- Returns:
- the branch index
instancesDownBranch
public abstract ReferenceInstances instancesDownBranch(int branch,
Instances sourceInstances)
Gets the subset of instances that apply to a particluar branch of the split. If the
branch index is -1, the subset will consist of those instances that don't apply to
any branch.
- Parameters:
branch
- the index of the branch
sourceInstances
- the instances from which to find the subset
- Returns:
- the set of instances that apply
attributeString
public abstract java.lang.String attributeString(Instances dataset)
Gets the string describing the attributes the split depends on.
i.e. the left hand side of the description of the split.
- Parameters:
dataset
- the dataset that the split is based on
- Returns:
- a string describing the attributes
comparisonString
public abstract java.lang.String comparisonString(int branchNum,
Instances dataset)
Gets the string describing the comparision the split depends on for a particular
branch. i.e. the right hand side of the description of the split.
- Parameters:
branchNum
- the branch of the split
dataset
- the dataset that the split is based on
- Returns:
- a string describing the comparison
equalTo
public abstract boolean equalTo(Splitter compare)
Tests whether two splitters are equivalent.
- Parameters:
compare
- the splitter to compare with
- Returns:
- whether or not they match
setChildForBranch
public abstract void setChildForBranch(int branchNum,
PredictionNode childPredictor)
Sets the child for a branch of the split.
- Parameters:
branchNum
- the branch to set the child for
childPredictor
- the new child
getChildForBranch
public abstract PredictionNode getChildForBranch(int branchNum)
Gets the child for a branch of the split.
- Parameters:
branchNum
- the branch to get the child for
- Returns:
- the child
clone
public abstract java.lang.Object clone()
Clones this node. Performs a deep copy, recursing through the tree.
- Returns:
- a clone
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