drasys.or.linear.blas
Class VectorBLAS1

java.lang.Object
  |
  +--drasys.or.linear.blas.VectorBLAS1

public class VectorBLAS1

extends java.lang.Object

BLAS1 layer that operates on contiguous vectors. For a traditional and more feature rich implementation of the BLAS see BLAS1, BLAS2 and BLAS3.

References:

Linear Algebra and Its Applications
    Gilbert Strang / Hardcover / Published 1988
Matrix Computations (Johns Hopkins Studies in the Mathematical Sciences)
    Gene H. Golub, Charles F. Van Loan (Contributor) / Paperback / Published 1996
Numerical Recipes in C : The Art of Scientific Computing
    William H. Press, et al / Hardcover / Published 1993

Constructor Summary

VectorBLAS1()           Create a vector BLAS with the default BLAS implementation and a base index of '0'.

VectorBLAS1(int base)           Create a vector BLAS with a default BLAS implementation and an explicit base index.

VectorBLAS1(int base, BLAS1I blas1)           Create a vector BLAS with an explicit BLAS implementation and an explicit base index.

 

Method Summary
double	dasum(ContiguousVectorI x)           Computes the sum of the absolute values.
void	daxpy(double a, ContiguousVectorI x, ContiguousVectorI y)           Constant times a vector plus a vector. Y = Y + a * X
void	dcopy(ContiguousVectorI x, ContiguousVectorI y)           Copies vector x to vector y. Y = X;
double	ddot(ContiguousVectorI x, ContiguousVectorI y)           Computes the dot product of two vectors. Y = X .
double	dnrm2(ContiguousVectorI x)           Computes the euclidean norm of the vector.
void	drot(ContiguousVectorI x, ContiguousVectorI y, double cos, double sin)           Applies a plane rotation.
void	dscal(double a, ContiguousVectorI x)           Scale a vector by a constant. X = a * X
void	dswap(ContiguousVectorI x, ContiguousVectorI y)           Interchange two vectors. X <-> Y
int	idamax(ContiguousVectorI x)           Finds the index of the element with the maximum absolute value.
void	zaxpy(ComplexI a, ContiguousVectorI x, ContiguousVectorI y)           Constant times a vector plus a vector. Y = Y + a * X
void	zcopy(ContiguousVectorI x, ContiguousVectorI y)           Copies vector x to vector y. Y = X;
Complex	zdotc(ContiguousVectorI x, ContiguousVectorI y, Complex results)           Computes the dot product of two vectors: alpha = conjugate(x) (.) y.
Complex	zdotu(ContiguousVectorI x, ContiguousVectorI y, Complex results)           Computes the dot product of two vectors: alpha = x (.) y.
void	zscal(ComplexI a, ContiguousVectorI x)           Scale a vector by a constant. X = a * X
void	zswap(ContiguousVectorI x, ContiguousVectorI y)           Interchange two vectors. X <-> Y

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

VectorBLAS1

public VectorBLAS1()

Create a vector BLAS with the default BLAS implementation and a base index of '0'. All computations will use elements A[0...(nrow-1)][0...(ncol-1)].

VectorBLAS1

public VectorBLAS1(int base)

Create a vector BLAS with a default BLAS implementation and an explicit base index. Typically 'base' will be '0' or '1'. All computations will use elements A[base...(nrow-1)][base...(ncol-1)].

VectorBLAS1

public VectorBLAS1(int base,
                   BLAS1I blas1)

Create a vector BLAS with an explicit BLAS implementation and an explicit base index. Typically 'base' will be '0' or '1'. All computations will use elements A[base...(nrow-1)][base...(ncol-1)].

dasum

public double dasum(ContiguousVectorI x)
             throws BlasException

Computes the sum of the absolute values.

daxpy

public void daxpy(double a,
                  ContiguousVectorI x,
                  ContiguousVectorI y)
           throws BlasException

Constant times a vector plus a vector.
Y = Y + a * X

dcopy

public void dcopy(ContiguousVectorI x,
                  ContiguousVectorI y)
           throws BlasException

Copies vector x to vector y.
Y = X;

ddot

public double ddot(ContiguousVectorI x,
                   ContiguousVectorI y)
            throws BlasException

Computes the dot product of two vectors.
Y = X . Y

drot

public void drot(ContiguousVectorI x,
                 ContiguousVectorI y,
                 double cos,
                 double sin)
          throws BlasException

Applies a plane rotation.

dscal

public void dscal(double a,
                  ContiguousVectorI x)
           throws BlasException

Scale a vector by a constant.
X = a * X

dswap

public void dswap(ContiguousVectorI x,
                  ContiguousVectorI y)
           throws BlasException

Interchange two vectors.
X <-> Y

dnrm2

public double dnrm2(ContiguousVectorI x)
             throws BlasException

Computes the euclidean norm of the vector.

idamax

public int idamax(ContiguousVectorI x)
           throws BlasException

Finds the index of the element with the maximum absolute value.

zaxpy

public void zaxpy(ComplexI a,
                  ContiguousVectorI x,
                  ContiguousVectorI y)
           throws BlasException

Constant times a vector plus a vector.
Y = Y + a * X

zcopy

public void zcopy(ContiguousVectorI x,
                  ContiguousVectorI y)
           throws BlasException

Copies vector x to vector y.
Y = X;

zdotu

public Complex zdotu(ContiguousVectorI x,
                     ContiguousVectorI y,
                     Complex results)
              throws BlasException

Computes the dot product of two vectors: alpha = x (.) y.

zdotc

public Complex zdotc(ContiguousVectorI x,
                     ContiguousVectorI y,
                     Complex results)
              throws BlasException

Computes the dot product of two vectors: alpha = conjugate(x) (.) y.

zscal

public void zscal(ComplexI a,
                  ContiguousVectorI x)
           throws BlasException

Scale a vector by a constant.
X = a * X

zswap

public void zswap(ContiguousVectorI x,
                  ContiguousVectorI y)
           throws BlasException

Interchange two vectors.
X <-> Y