org.datavec.api.transform.transform.doubletransform

Class MinMaxNormalizer

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.MinMaxNormalizer

All Implemented Interfaces:

Serializable, ColumnOp, Transform

public class MinMaxNormalizer
extends BaseDoubleTransform

Normalizer to map (min to max) -> (newMin-to newMax) linearly.

Mathematically: (newMax-newMin)/(max-min) * (x-min) + newMin

Author:

Alex Black

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected double	max
protected double	min
protected double	newMax
protected double	newMin
protected double	ratio

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
MinMaxNormalizer(String columnName, double min, double max)
MinMaxNormalizer(String columnName, double min, double max, double newMin, double newMax)

Method Summary

Modifier and Type	Method and Description
ColumnMetaData	getNewColumnMetaData(String newColumnName, ColumnMetaData oldColumnMeta)
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.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

min

protected final double min

max

protected final double max

newMin

protected final double newMin

newMax

protected final double newMax

ratio

protected final double ratio

Constructor Detail

MinMaxNormalizer

public MinMaxNormalizer(String columnName,
                        double min,
                        double max)

MinMaxNormalizer

public MinMaxNormalizer(String columnName,
                        double min,
                        double max,
                        double newMin,
                        double newMax)

Method Detail

map

public Writable map(Writable writable)

Specified by:

map in class BaseDoubleTransform

getNewColumnMetaData

public ColumnMetaData getNewColumnMetaData(String newColumnName,
                                           ColumnMetaData oldColumnMeta)

Overrides:

getNewColumnMetaData 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