jsat.datatransform

Class InverseOfTransform

java.lang.Object

jsat.datatransform.InverseOfTransform

All Implemented Interfaces:

Serializable, Cloneable, DataTransform

public class InverseOfTransform
extends Object
implements DataTransform

Creates a new Transform object that simply uses the inverse of an InvertibleTransform as a regular transform. This allows one to apply inverses after the fact in a simple matter like:

  DataSet x = //some data set;
  InvertibleTransform transform = //some transform;
  x.applyTransform(transform);//apply the original transform
  //reverse the transform, getting back to where we started
  x.applyTransform(new InverseOfTransform(transform));
 

Author:

Edward Raff

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
InverseOfTransform(InverseOfTransform toClone) Copy constructor
InverseOfTransform(InvertibleTransform transform) Creates a new transform that uses the transform of the given transform

Method Summary

Modifier and Type	Method and Description
InverseOfTransform	clone()
void	fit(DataSet data) Fits this transform to the given dataset.
DataPoint	transform(DataPoint dp) Returns a new data point that is a transformation of the original data point.

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InverseOfTransform

public InverseOfTransform(InvertibleTransform transform)

Creates a new transform that uses the transform of the given transform

Parameters:

transform - the transform to use the inverse function of

InverseOfTransform

public InverseOfTransform(InverseOfTransform toClone)

Copy constructor

Parameters:

toClone - the object to copy

Method Detail

fit

public void fit(DataSet data)

Description copied from interface: DataTransform

Fits this transform to the given dataset. Some transforms can only be learned from classification or regression datasets. If an incompatible dataset type is given, a FailedToFitException exception may be thrown.

Specified by:

fit in interface DataTransform

Parameters:

data - the dataset to fir this transform to

transform

public DataPoint transform(DataPoint dp)

Description copied from interface: DataTransform

Returns a new data point that is a transformation of the original data point. This new data point is a different object, but may contain the same references as the original data point. It is not guaranteed that you can mutate the transformed point without having a side effect on the original point.

Specified by:

transform in interface DataTransform

Parameters:

dp - the data point to apply a transformation to

Returns:

a transformed data point

clone

public InverseOfTransform clone()

Specified by:

clone in interface DataTransform

Overrides:

clone in class Object