Class CooConversions

java.lang.Object

org.flag4j.linalg.ops.sparse.coo.CooConversions

public final class CooConversions
extends Object

Utility class for converting COO tensor to another type of tensor.

Method Summary

Modifier and Type	Method	Description
static <T> void	toCsr(Shape shape, T[] entries, int[] rowIndices, int[] colIndices, T[] destEntries, int[] destRowPointers, int[] destColIndices)	Converts a COO matrix to an equivalent CSR matrix.
static <T> void	toDense(Shape shape, T[] entries, int[][] indices, T[] dest)	Converts a sparse COO tensor to an equivalent dense tensor.

Methods inherited from class java.lang.Object

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

Method Details

toDense

public static <T> void toDense(Shape shape,
 T[] entries,
 int[][] indices,
 T[] dest)

Converts a sparse COO tensor to an equivalent dense tensor.

Parameters:

shape - Shape of the COO tensor.

entries - Non-zero data of the COO tensor.

indices - Non-zero indices of the COO tensor.

dest - Array to store the dense result in.

Throws:

IllegalArgumentException - If dest.length != shape.totalEntriesIntValueExact().

toCsr

public static <T> void toCsr(Shape shape,
 T[] entries,
 int[] rowIndices,
 int[] colIndices,
 T[] destEntries,
 int[] destRowPointers,
 int[] destColIndices)

Converts a COO matrix to an equivalent CSR matrix.

Parameters:

shape - Shape of the COO matrix.

entries - Non-zero data of the COO matrix.

rowIndices - Non-zero row indices of the COO matrix.

colIndices - Non-zero column indices of the COO matrix.

destEntries - Array to store non-zero data of the CSR matrix.

destRowPointers - Array to store non-zero row pointers of the CSR matrix.

destColIndices - Array to store non-zero column indices of the CSR matrix.