Package org.tribuo.math.util

Class SigmoidNormalizer

java.lang.Object

org.tribuo.math.util.SigmoidNormalizer

All Implemented Interfaces:

Serializable, VectorNormalizer

public class SigmoidNormalizer
extends Object
implements VectorNormalizer, Serializable

Normalizes the input by applying a logistic sigmoid to each element. Used when the input is independent dimensions of log space.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
SigmoidNormalizer()

Method Summary

Modifier and Type	Method	Description
ONNXNode	exportNormalizer(ONNXNode input)	Returns the ONNX sigmoid node, operating independently over each element.
double[]	normalize(double[] input)	Normalizes the input array in some fashion specified by the class.
void	normalizeInPlace(double[] input)	In place normalization of the array.
static double	sigmoid(double input)	A logistic sigmoid function.

Methods inherited from class java.lang.Object

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

Constructor Details

SigmoidNormalizer

public SigmoidNormalizer()

Method Details

sigmoid

public static double sigmoid(double input)

A logistic sigmoid function.

Parameters:

input - The input to sigmoid.

Returns:

The logistic function applied to the input.

normalize

public double[] normalize(double[] input)

Description copied from interface: VectorNormalizer

Normalizes the input array in some fashion specified by the class.

Specified by:

normalize in interface VectorNormalizer

Parameters:

input - The input to normalize.

Returns:

The normalized array.

normalizeInPlace

public void normalizeInPlace(double[] input)

Description copied from interface: VectorNormalizer

In place normalization of the array.

Note: This default implementation performs a copy by calling the standard normalize method.

Specified by:

normalizeInPlace in interface VectorNormalizer

Parameters:

input - The input to normalize.

exportNormalizer

public ONNXNode exportNormalizer(ONNXNode input)

Returns the ONNX sigmoid node, operating independently over each element.

Specified by:

exportNormalizer in interface VectorNormalizer

Parameters:

input - The node to be normalized according to this implementation.

Returns:

the sigmoid node applied to input.