RegTreeNodeStat

java.lang.Object
- biz.k11i.xgboost.tree.RegTreeNodeStat

All Implemented Interfaces:

INodeStat, java.io.Serializable
```
public class RegTreeNodeStat
extends java.lang.Object
implements INodeStat, java.io.Serializable
```
Statistics for node in tree.

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`(package private) float`	`base_weight`
`(package private) int`	`leaf_child_cnt`
`(package private) float`	`loss_chg`
`(package private) float`	`sum_hess`

Constructor Summary

Constructors
Constructor Description

RegTreeNodeStat(ModelReader reader)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`float`	`getBaseWeight()`
`float`	`getCover()`
`float`	`getGain()`
`int`	`getLeafCount()`
`float`	`getWeight()`

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

- Field Detail
  - loss_chg
```
final float loss_chg
```
  - sum_hess
```
final float sum_hess
```
  - base_weight
```
final float base_weight
```
  - leaf_child_cnt
```
final int leaf_child_cnt
```
- Constructor Detail
  - RegTreeNodeStat
```
RegTreeNodeStat(ModelReader reader)
         throws java.io.IOException
```
    Throws:
    
    java.io.IOException
- Method Detail
  - getWeight
```
public float getWeight()
```
    Specified by:
    
    getWeight in interface INodeStat
  - getGain
```
public float getGain()
```
    Returns:
    
    loss chg caused by current split
  - getCover
```
public float getCover()
```
    Returns:
    
    sum of hessian values, used to measure coverage of data
  - getBaseWeight
```
public float getBaseWeight()
```
    Returns:
    
    weight of current node
  - getLeafCount
```
public int getLeafCount()
```
    Returns:
    
    number of child that is leaf node known up to now