org.nd4j.linalg.inverse

Class InvertMatrix

java.lang.Object

org.nd4j.linalg.inverse.InvertMatrix

public class InvertMatrix
extends Object

Constructor Summary

Constructors

Constructor and Description
InvertMatrix()

Method Summary

Modifier and Type	Method and Description
static INDArray	invert(INDArray arr, boolean inPlace) Inverts a matrix
static INDArray	pinvert(INDArray arr, boolean inPlace) Calculates pseudo inverse of a matrix using QR decomposition
static INDArray	pLeftInvert(INDArray arr, boolean inPlace) Compute the left pseudo inverse.
static INDArray	pRightInvert(INDArray arr, boolean inPlace) Compute the right pseudo inverse.

Methods inherited from class java.lang.Object

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

Constructor Detail

InvertMatrix

public InvertMatrix()

Method Detail

invert

public static INDArray invert(INDArray arr,
                              boolean inPlace)

Inverts a matrix

Parameters:

arr - the array to invert

inPlace - Whether to store the result in arr

Returns:

the inverted matrix

pinvert

public static INDArray pinvert(INDArray arr,
                               boolean inPlace)

Calculates pseudo inverse of a matrix using QR decomposition

Parameters:

arr - the array to invert

Returns:

the pseudo inverted matrix

pLeftInvert

public static INDArray pLeftInvert(INDArray arr,
                                   boolean inPlace)

Compute the left pseudo inverse. Input matrix must have full column rank. See also: Moore–Penrose inverse

Parameters:

arr - Input matrix

inPlace - Whether to store the result in arr

Returns:

Left pseudo inverse of arr

Throws:

IllegalArgumentException - Input matrix arr did not have full column rank.

pRightInvert

public static INDArray pRightInvert(INDArray arr,
                                    boolean inPlace)

Compute the right pseudo inverse. Input matrix must have full row rank. See also: Moore–Penrose inverse

Parameters:

arr - Input matrix

inPlace - Whether to store the result in arr

Returns:

Right pseudo inverse of arr

Throws:

IllegalArgumentException - Input matrix arr did not have full row rank.