SplitEvaluate

All Known Implementing Classes:

CorrelationSplitInfo, YongSplitInfo
```
public interface SplitEvaluate
```
Interface for objects that determine a split point on an attribute

Version:

$Revision: 1.3 $

Author:

Mark Hall (mhall@cs.waikato.ac.nz)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`attrSplit(int attr, Instances inst)`	Finds the best splitting point for an attribute in the instances
`SplitEvaluate`	`copy()`	makes a copy of the SplitEvaluate object
`double`	`maxImpurity()`	Returns the impurity of this split
`int`	`position()`	Returns the position of the split in the sorted values.
`int`	`splitAttr()`	Returns the attribute used in this split
`double`	`splitValue()`	Returns the split value

- Method Detail
  - copy
```
SplitEvaluate copy()
            throws java.lang.Exception
```
    makes a copy of the SplitEvaluate object
    
    Returns:
    
    a copy of the object
    
    Throws:
    
    java.lang.Exception
  - attrSplit
```
void attrSplit(int attr,
               Instances inst)
        throws java.lang.Exception
```
    Finds the best splitting point for an attribute in the instances
    
    Parameters:
    
    attr - the splitting attribute
    
    inst - the instances
    
    Throws:
    
    java.lang.Exception - if something goes wrong
  - maxImpurity
```
double maxImpurity()
```
    Returns the impurity of this split
    
    Returns:
    
    the impurity of this split
  - position
```
int position()
```
    Returns the position of the split in the sorted values. -1 indicates that a split could not be found.
    
    Returns:
    
    an int value
  - splitAttr
```
int splitAttr()
```
    Returns the attribute used in this split
    
    Returns:
    
    the attribute used in this split
  - splitValue
```
double splitValue()
```
    Returns the split value
    
    Returns:
    
    the split value