Package org.flag4j.operations.dense_sparse.coo.real

Class RealDenseSparseVectorOperations

java.lang.Object

org.flag4j.operations.dense_sparse.coo.real.RealDenseSparseVectorOperations

public class RealDenseSparseVectorOperations
extends Object

This class provides low level methods for computing operations between a real dense/sparse vector and a real sparse/dense vector.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	RealDenseSparseVectorOperations()

Method Summary

Modifier and Type	Method	Description
static Vector	add(Vector src1, CooVector src2)	Adds a real dense vector to a real sparse vector.
static void	addEq(Vector src1, CooVector src2)	Adds a real dense vector to a real sparse vector and stores the result in the first vector.
static CooVector	elemDiv(CooVector src1, Vector src2)	Compute the element-wise division between a sparse vector and a dense vector.
static CooVector	elemMult(Vector src1, CooVector src2)	Computes the element-wise multiplication of a real dense vector with a real sparse vector.
static double	inner(double[] src1, double[] src2, int[] indices, int sparseSize)	Computes the vector inner product between a real dense vector and a real sparse vector.
static double[]	outerProduct(double[] src1, double[] src2, int[] indices, int sparseSize)	Computes the vector outer product between a real dense vector and a real sparse vector.
static double[]	outerProduct(double[] src1, int[] indices, int sparseSize, double[] src2)	Computes the vector outer product between a real dense vector and a real sparse vector.
static Vector	sub(Vector src1, CooVector src2)	Subtracts a real sparse vector from a real dense vector.
static Vector	sub(CooVector src1, Vector src2)	Subtracts a real dense vector from a real sparse vector.
static void	subEq(Vector src1, CooVector src2)	Adds a real dense vector to a real sparse vector and stores the result in the first vector.

Methods inherited from class java.lang.Object

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

Constructor Details

RealDenseSparseVectorOperations

private RealDenseSparseVectorOperations()

Method Details

inner

public static double inner(double[] src1,
 double[] src2,
 int[] indices,
 int sparseSize)

Computes the vector inner product between a real dense vector and a real sparse vector.

Parameters:

src1 - Entries of the dense vector.

src2 - Non-zero entries of the sparse vector.

indices - Indices of non-zero entries in the sparse vector.

sparseSize - The size of the sparse vector (including zero entries).

Returns:

The inner product of the two vectors.

Throws:

IllegalArgumentException - If the number of entries in the two vectors is not equivalent.

outerProduct

public static double[] outerProduct(double[] src1,
 double[] src2,
 int[] indices,
 int sparseSize)

Computes the vector outer product between a real dense vector and a real sparse vector.

Parameters:

src1 - Entries of the dense vector.

src2 - Non-zero entries of the sparse vector.

indices - Indices of non-zero entries of sparse vector.

sparseSize - Full size of the sparse vector including zero entries.

Returns:

The matrix resulting from the vector outer product.

outerProduct

public static double[] outerProduct(double[] src1,
 int[] indices,
 int sparseSize,
 double[] src2)

Computes the vector outer product between a real dense vector and a real sparse vector.

Parameters:

src1 - Non-zero entries of the sparse vector.

indices - Indices of non-zero entries of sparse vector.

sparseSize - Full size of the sparse vector including zero entries.

src2 - Entries of the dense vector.

Returns:

The matrix resulting from the vector outer product.

sub

public static Vector sub(Vector src1,
 CooVector src2)

Subtracts a real sparse vector from a real dense vector.

Parameters:

src1 - Dense vector.

src2 - Sparse vector.

Returns:

The result of the vector subtraction.

Throws:

IllegalArgumentException - If the vectors do not have the same shape.

sub

public static Vector sub(CooVector src1,
 Vector src2)

Subtracts a real dense vector from a real sparse vector.

Parameters:

src1 - Sparse vector.

src2 - Dense vector.

Returns:

The result of the vector subtraction.

Throws:

IllegalArgumentException - If the vectors do not have the same shape.

addEq

public static void addEq(Vector src1,
 CooVector src2)

Adds a real dense vector to a real sparse vector and stores the result in the first vector.

Parameters:

src1 - Dense vector. Also, where the result will be stored.

src2 - Sparse vector.

Throws:

IllegalArgumentException - If the vectors do not have the same shape.

subEq

public static void subEq(Vector src1,
 CooVector src2)

Adds a real dense vector to a real sparse vector and stores the result in the first vector.

Parameters:

src1 - Dense vector. Also, where the result will be stored.

src2 - Sparse vector.

Throws:

IllegalArgumentException - If the vectors do not have the same shape.

elemMult

public static CooVector elemMult(Vector src1,
 CooVector src2)

Computes the element-wise multiplication of a real dense vector with a real sparse vector.

Parameters:

src1 - Dense vector.

src2 - Sparse vector.

Returns:

The result of the element-wise multiplication.

Throws:

IllegalArgumentException - If the two vectors are not the same size.

add

public static Vector add(Vector src1,
 CooVector src2)

Adds a real dense vector to a real sparse vector.

Parameters:

src1 - Entries of first vector in the sum.

src2 - Entries of second vector in the sum.

Returns:

The result of the vector addition.

Throws:

IllegalArgumentException - If the vectors do not have the same shape.

elemDiv

public static CooVector elemDiv(CooVector src1,
 Vector src2)

Compute the element-wise division between a sparse vector and a dense vector.

Parameters:

src1 - First vector in the element-wise division.

src2 - Second vector in the element-wise division.

Returns:

The result of the element-wise vector division.