StandardNormalizer (Solr 9.9.0 ltr API)

java.lang.Object
- org.apache.solr.ltr.norm.Normalizer
- - org.apache.solr.ltr.norm.StandardNormalizer

```
public class StandardNormalizer
extends Normalizer
```
A Normalizer to scale a feature value around an average-and-standard-deviation distribution.
Example configuration:
```
 "norm" : {
   "class" : "org.apache.solr.ltr.norm.StandardNormalizer",
   "params" : { "avg":"42", "std":"6" }
 }
 
```
Example normalizations:
- 39 will be normalized to -0.5
- 42 will be normalized to 0
- 45 will be normalized to +0.5

Constructor Summary

Constructors
Constructor Description

StandardNormalizer()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`float`	`getAvg()`
`float`	`getStd()`
`float`	`normalize(float value)`
`LinkedHashMap<String,Object>`	`paramsToMap()`
`void`	`setAvg(float avg)`
`void`	`setAvg(String avg)`
`void`	`setStd(float std)`
`void`	`setStd(String std)`
`String`	`toString()`
`protected void`	`validate()`	As part of creation of a normalizer instance, this function confirms that the normalizer parameters are valid.

Methods inherited from class org.apache.solr.ltr.norm.Normalizer
explain, getInstance

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

- Constructor Detail
  - StandardNormalizer
```
public StandardNormalizer()
```
- Method Detail
  - getAvg
```
public float getAvg()
```
  - setAvg
```
public void setAvg(float avg)
```
  - getStd
```
public float getStd()
```
  - setStd
```
public void setStd(float std)
```
  - setAvg
```
public void setAvg(String avg)
```
  - setStd
```
public void setStd(String std)
```
  - normalize
```
public float normalize(float value)
```
    Specified by:
    
    normalize in class Normalizer
  - validate
```
protected void validate()
                 throws NormalizerException
```
    Description copied from class: Normalizer
    
    As part of creation of a normalizer instance, this function confirms that the normalizer parameters are valid.
    
    Specified by:
    
    validate in class Normalizer
    
    Throws:
    
    NormalizerException - Normalizer Exception
  - paramsToMap
```
public LinkedHashMap<String,Object> paramsToMap()
```
    Specified by:
    
    paramsToMap in class Normalizer
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object