Class SemiringCsrOps

java.lang.Object

org.flag4j.linalg.ops.sparse.csr.semiring_ops.SemiringCsrOps

public final class SemiringCsrOps
extends Object

Utility class for computing ops on sparse CSR Semiring tensors.

Method Summary

Modifier and Type	Method	Description
static <T extends Semiring<T>> T	trace(T[] entries, int[] rowPointers, int[] colIndices)	Computes the trace of a sparse CSR matrix.

Methods inherited from class java.lang.Object

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

Method Details

trace

public static <T extends Semiring<T>> T trace(T[] entries,
 int[] rowPointers,
 int[] colIndices)

Computes the trace of a sparse CSR matrix. That is, the sum of values along the principle diagonal of the matrix.

Parameters:

entries - Non-zero data of the CSR matrix.

rowPointers - Non-zero row pointers of the CSR matrix.

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

Returns:

The trace of the CSR matrix. If there are no non-zero data in this matrix along the principle diagonal, this method will attempt to return the zero element of the semiring. However, if data.length == 0 then this cannot be determined and null will be returned instead.