org.datavec.api.transform.transform.doubletransform

Class StandardizeNormalizer

java.lang.Object

org.datavec.api.transform.transform.BaseTransform

org.datavec.api.transform.transform.BaseColumnTransform

org.datavec.api.transform.transform.doubletransform.BaseDoubleTransform

org.datavec.api.transform.transform.doubletransform.StandardizeNormalizer

All Implemented Interfaces:

Serializable, ColumnOp, Operation<Schema,Schema>, Transform

public class StandardizeNormalizer
extends BaseDoubleTransform

Normalize using (x-mean)/stdev. Also known as a standard score, standardization etc.

Author:

Alex Black

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected double	mean
protected double	stdev

Fields inherited from class org.datavec.api.transform.transform.BaseColumnTransform

columnName, columnNumber

Fields inherited from class org.datavec.api.transform.transform.BaseTransform

inputSchema

Constructor Summary

Constructors

Constructor and Description
StandardizeNormalizer(String columnName, double mean, double stdev)

Method Summary

Modifier and Type	Method and Description
Object	map(Object input) Transform an object in to another object
Writable	map(Writable writable)
String	toString()

Methods inherited from class org.datavec.api.transform.transform.doubletransform.BaseDoubleTransform

getNewColumnMetaData

Methods inherited from class org.datavec.api.transform.transform.BaseColumnTransform

columnName, columnNames, equals, hashCode, map, mapSequence, outputColumnName, outputColumnNames, setInputSchema, transform

Methods inherited from class org.datavec.api.transform.transform.BaseTransform

getInputSchema, mapSequence

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.datavec.api.transform.ColumnOp

getInputSchema

Field Detail

mean

protected final double mean

stdev

protected final double stdev

Constructor Detail

StandardizeNormalizer

public StandardizeNormalizer(String columnName,
                             double mean,
                             double stdev)

Method Detail

map

public Writable map(Writable writable)

Specified by:

map in class BaseDoubleTransform

toString

public String toString()

Specified by:

toString in class BaseColumnTransform

map

public Object map(Object input)

Transform an object in to another object

Parameters:

input - the record to transform

Returns:

the transformed writable