Class CooTranspose

java.lang.Object

org.flag4j.linalg.ops.sparse.coo.CooTranspose

public final class CooTranspose
extends Object

Utility class for computing the transpose of a sparse COO tensor or matrix.

Method Summary

Modifier and Type	Method	Description
static void	tensorTranspose(Shape shape, Object[] srcEntries, int[][] srcIndices, int[] axes, Object[] destEntries, int[][] destIndices)	Computes the transpose of a sparse COO tensor.
static void	tensorTranspose(Shape shape, Object[] srcEntries, int[][] srcIndices, int axis1, int axis2, Object[] destEntries, int[][] destIndices)	Computes the transpose of a sparse COO tensor by exchanging axis1 and axis2.

Methods inherited from class java.lang.Object

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

Method Details

tensorTranspose

public static void tensorTranspose(Shape shape,
 Object[] srcEntries,
 int[][] srcIndices,
 int axis1,
 int axis2,
 Object[] destEntries,
 int[][] destIndices)

Computes the transpose of a sparse COO tensor by exchanging axis1 and axis2.

Parameters:

shape - Shape of the tensor to transpose.

srcEntries - The non-zero data of the tensor to transpose.

srcIndices - The non-zero indices of the tensor to transpose. Must have shape [srcEntries.length][shape.getRank()].

axis1 - First axis to exchange. Must be in the range [0, shape.getRank()).

axis2 - Second axis to exchange. Must be in the range [0, shape.getRank()).

destEntries - Array to store the non-zero data of the transpose. Must have the same length as srcEntries.

destIndices - Array to store the non-zero indices of the transpose. Must have shape [srcEntries.length][shape.getRank()]

srcIndices -

Throws:

IndexOutOfBoundsException - If either axis1 or axis2 are out of bounds for the rank of this tensor.

See Also:

• tensorTranspose(Shape, Object[], int[][], int[], Object[], int[][])

tensorTranspose

public static void tensorTranspose(Shape shape,
 Object[] srcEntries,
 int[][] srcIndices,
 int[] axes,
 Object[] destEntries,
 int[][] destIndices)

Computes the transpose of a sparse COO tensor. That is, permutes the axes of the tensor so that it matches the permutation specified by axes.

Parameters:

shape - Shape of the tensor to transpose.

srcEntries - The non-zero data of the tensor to transpose.

srcIndices - The non-zero indices of the tensor to transpose. Must have shape [srcEntries.length][shape.getRank()].

axes - Permutation of tensor axis. If the tensor has rank N, then this must be an array of length N which is a permutation of {0, 1, 2, ..., N-1}.

destEntries - Array to store the non-zero data of the transpose. Must have the same length as srcEntries.

destIndices - Array to store the non-zero indices of the transpose. Must have shape [srcEntries.length][shape.getRank()]

Throws:

IllegalArgumentException - If srcEntries, srcIndices, destEntries, and destIndices do not all have the same length.

IndexOutOfBoundsException - If any element of axes is out of bounds for the rank of this tensor.

IllegalArgumentException - If axes is not a permutation of {1, 2, 3, ... N-1}.