Package org.flag4j.operations.dense_sparse.csr.real_complex

Class RealComplexCsrDenseMatrixMultiplication

java.lang.Object

org.flag4j.operations.dense_sparse.csr.real_complex.RealComplexCsrDenseMatrixMultiplication

public final class RealComplexCsrDenseMatrixMultiplication
extends Object

This class contains low-level implementations of real-complex sparse-dense matrix multiplication where the sparse matrix is in CSR format.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	RealComplexCsrDenseMatrixMultiplication()

Method Summary

Modifier and Type	Method	Description
static CMatrix	standard(CMatrix src1, CsrMatrix src2)	Computes the matrix multiplication between a real dense matrix and a real sparse CSR matrix.
static CMatrix	standard(Matrix src1, CsrCMatrix src2)	Computes the matrix multiplication between a real dense matrix and a real sparse CSR matrix.
static CMatrix	standard(CsrCMatrix src1, Matrix src2)	Computes the matrix multiplication between a complex sparse CSR matrix and a real dense matrix.
static CMatrix	standard(CsrMatrix src1, CMatrix src2)	Computes the matrix multiplication between a real sparse CSR matrix and a complex dense matrix.
static CMatrix	standardTranspose(CsrMatrix src1, CMatrix src2)	Computes the matrix multiplication between a real sparse CSR matrix and the transpose of a complex dense matrix.
static CVector	standardVector(CsrCMatrix src1, Vector src2)	Computes the matrix-vector multiplication between a real sparse CSR matrix and a complex dense vector.
static CVector	standardVector(CsrMatrix src1, CVector src2)	Computes the matrix-vector multiplication between a real sparse CSR matrix and a complex dense vector.

Methods inherited from class java.lang.Object

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

Constructor Details

RealComplexCsrDenseMatrixMultiplication

private RealComplexCsrDenseMatrixMultiplication()

Method Details

standard

public static CMatrix standard(CsrMatrix src1,
 CMatrix src2)

Computes the matrix multiplication between a real sparse CSR matrix and a complex dense matrix. WARNING: If the first matrix is very large but not very sparse, this method may be slower than converting the first matrix to a dense matrix and calling Matrix.mult(CMatrix).

Parameters:

src1 - First matrix in the matrix multiplication.

src2 - Second matrix in the matrix multiplication.

Returns:

The result of the matrix multiplication between src1 and src2.

Throws:

IllegalArgumentException - If src1 does not have the same number of columns as src2 has rows.

standardTranspose

public static CMatrix standardTranspose(CsrMatrix src1,
 CMatrix src2)

Computes the matrix multiplication between a real sparse CSR matrix and the transpose of a complex dense matrix. WARNING: This method is likely slower than standard(src1, src2.T()) unless src1 has many more columns than rows and is very sparse.

Parameters:

src1 - First matrix in the matrix multiplication.

src2 - Second matrix in the matrix multiplication. Will be implicitly transposed.

Returns:

The result of the matrix multiplication between src1 and src2.

Throws:

IllegalArgumentException - If src1 and src2 do not have the same number of rows.

standard

public static CMatrix standard(Matrix src1,
 CsrCMatrix src2)

Computes the matrix multiplication between a real dense matrix and a real sparse CSR matrix. WARNING: If the second matrix is very large but not very sparse, this method may be slower than converting the second matrix to a dense matrix and calling Matrix.mult(Matrix).

Parameters:

src1 - First matrix in the matrix multiplication (dense matrix).

src2 - Second matrix in the matrix multiplication (sparse CSR matrix).

Returns:

The result of the matrix multiplication between src1 and src2.

Throws:

IllegalArgumentException - If src1 does not have the same number of columns as src2 has rows.

standard

public static CMatrix standard(CMatrix src1,
 CsrMatrix src2)

Computes the matrix multiplication between a real dense matrix and a real sparse CSR matrix. WARNING: If the second matrix is very large but not very sparse, this method may be slower than converting the second matrix to a dense matrix and calling Matrix.mult(Matrix).

Parameters:

src1 - First matrix in the matrix multiplication (dense matrix).

src2 - Second matrix in the matrix multiplication (sparse CSR matrix).

Returns:

The result of the matrix multiplication between src1 and src2.

Throws:

IllegalArgumentException - If src1 does not have the same number of columns as src2 has rows.

standardVector

public static CVector standardVector(CsrMatrix src1,
 CVector src2)

Computes the matrix-vector multiplication between a real sparse CSR matrix and a complex dense vector.

Parameters:

src1 - The matrix in the multiplication.

src2 - Vector in multiplication. Treated as a column vector.

Returns:

The result of the matrix-vector multiplication.

Throws:

IllegalArgumentException - If the number of columns in src1 does not equal the length of src2.

standard

public static CMatrix standard(CsrCMatrix src1,
 Matrix src2)

Computes the matrix multiplication between a complex sparse CSR matrix and a real dense matrix. WARNING: If the first matrix is very large but not very sparse, this method may be slower than converting the first matrix to a dense matrix and calling Matrix.mult(CMatrix).

Parameters:

src1 - First matrix in the matrix multiplication.

src2 - Second matrix in the matrix multiplication.

Returns:

The result of the matrix multiplication between src1 and src2.

Throws:

IllegalArgumentException - If src1 does not have the same number of columns as src2 has rows.

standardVector

public static CVector standardVector(CsrCMatrix src1,
 Vector src2)

Computes the matrix-vector multiplication between a real sparse CSR matrix and a complex dense vector.

Parameters:

src1 - The matrix in the multiplication.

src2 - Vector in multiplication. Treated as a column vector.

Returns:

The result of the matrix-vector multiplication.

Throws:

IllegalArgumentException - If the number of columns in src1 does not equal the length of src2.