Package org.ejml.dense.row.mult

Class VectorVectorMult_CDRM

java.lang.Object

org.ejml.dense.row.mult.VectorVectorMult_CDRM

public class VectorVectorMult_CDRM
extends java.lang.Object

Operations that involve multiplication of two vectors.

Constructor Summary

Constructors

Constructor	Description
VectorVectorMult_CDRM()

Method Summary

Modifier and Type	Method	Description
static org.ejml.data.Complex_F32	innerProd(org.ejml.data.CMatrixRMaj x, org.ejml.data.CMatrixRMaj y, org.ejml.data.Complex_F32 output)	Computes the inner product of the two vectors.
static org.ejml.data.Complex_F32	innerProdH(org.ejml.data.CMatrixRMaj x, org.ejml.data.CMatrixRMaj y, org.ejml.data.Complex_F32 output)	Computes the inner product between a vector and the conjugate of another one.
static void	outerProd(org.ejml.data.CMatrixRMaj x, org.ejml.data.CMatrixRMaj y, org.ejml.data.CMatrixRMaj A)	Sets A ∈ ℜ m × n equal to an outer product multiplication of the two vectors.
static void	outerProdH(org.ejml.data.CMatrixRMaj x, org.ejml.data.CMatrixRMaj y, org.ejml.data.CMatrixRMaj A)	Sets A ∈ ℜ m × n equal to an outer product multiplication of the two vectors.

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorVectorMult_CDRM

public VectorVectorMult_CDRM()

Method Detail

innerProd

public static org.ejml.data.Complex_F32 innerProd(org.ejml.data.CMatrixRMaj x,
                                                  org.ejml.data.CMatrixRMaj y,
                                                  org.ejml.data.Complex_F32 output)

Computes the inner product of the two vectors. In geometry this is known as the dot product.

∑_k=1:n x_k * y_k
where x and y are vectors with n elements.

These functions are often used inside of highly optimized code and therefor sanity checks are kept to a minimum. It is not recommended that any of these functions be used directly.

Parameters:

x - A vector with n elements. Not modified.

y - A vector with n elements. Not modified.

Returns:

The inner product of the two vectors.

innerProdH

public static org.ejml.data.Complex_F32 innerProdH(org.ejml.data.CMatrixRMaj x,
                                                   org.ejml.data.CMatrixRMaj y,
                                                   org.ejml.data.Complex_F32 output)

Computes the inner product between a vector and the conjugate of another one.

∑_k=1:n x_k * conj(y_k)
where x and y are vectors with n elements.

These functions are often used inside of highly optimized code and therefor sanity checks are kept to a minimum. It is not recommended that any of these functions be used directly.

Parameters:

x - A vector with n elements. Not modified.

y - A vector with n elements. Not modified.

Returns:

The inner product of the two vectors.

outerProd

public static void outerProd(org.ejml.data.CMatrixRMaj x,
                             org.ejml.data.CMatrixRMaj y,
                             org.ejml.data.CMatrixRMaj A)

Sets A ∈ ℜ ^{m × n} equal to an outer product multiplication of the two vectors. This is also known as a rank-1 operation.

A = x * y^T where x ∈ ℜ ^m and y ∈ ℜ ⁿ are vectors.

Which is equivalent to: A_ij = x_i*y_j

Parameters:

x - A vector with m elements. Not modified.

y - A vector with n elements. Not modified.

A - A Matrix with m by n elements. Modified.

outerProdH

public static void outerProdH(org.ejml.data.CMatrixRMaj x,
                              org.ejml.data.CMatrixRMaj y,
                              org.ejml.data.CMatrixRMaj A)

Sets A ∈ ℜ ^{m × n} equal to an outer product multiplication of the two vectors. This is also known as a rank-1 operation.

A = x * y^H where x ∈ ℜ ^m and y ∈ ℜ ⁿ are vectors.

Which is equivalent to: A_ij = x_i*y_j

Parameters:

x - A vector with m elements. Not modified.

y - A vector with n elements. Not modified.

A - A Matrix with m by n elements. Modified.