BlaVector.c File Reference

BLAS1 operations for vectors. More...

#include <math.h>
#include "fasp.h"
#include "fasp_functs.h"

Go to the source code of this file.

Functions
void	fasp_blas_dvec_axpy (const REAL a, const dvector *x, dvector *y)
	y = a*x + y More...
void	fasp_blas_dvec_axpyz (const REAL a, const dvector *x, const dvector *y, dvector *z)
	z = a*x + y, z is a third vector (z is cleared) More...
REAL	fasp_blas_dvec_norm1 (const dvector *x)
	L1 norm of dvector x. More...
REAL	fasp_blas_dvec_norm2 (const dvector *x)
	L2 norm of dvector x. More...
REAL	fasp_blas_dvec_norminf (const dvector *x)
	Linf norm of dvector x. More...
REAL	fasp_blas_dvec_dotprod (const dvector *x, const dvector *y)
	Inner product of two vectors (x,y) More...
REAL	fasp_blas_dvec_relerr (const dvector *x, const dvector *y)
	Relative difference between two dvector x and y. More...

Detailed Description

BLAS1 operations for vectors.

Note

This file contains Level-1 (Bla) functions. It requires: AuxMessage.c, AuxThreads.c, and BlaArray.c

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Copyright (C) 2009–Present by the FASP team. All rights reserved.

Released under the terms of the GNU Lesser General Public License 3.0 or later.

Definition in file BlaVector.c.

Function Documentation

fasp_blas_dvec_axpy()

void fasp_blas_dvec_axpy	(	const REAL	a,
		const dvector *	x,
		dvector *	y
	)

y = a*x + y

Parameters

a	REAL factor a
x	Pointer to dvector x
y	Pointer to dvector y

Author

Chensong Zhang

Date

07/01/2009

Modified by Chunsheng Feng, Xiaoqiang Yue on 05/23/2012

Definition at line 41 of file BlaVector.c.

fasp_blas_dvec_axpyz()

void fasp_blas_dvec_axpyz	(	const REAL	a,
		const dvector *	x,
		const dvector *	y,
		dvector *	z
	)

z = a*x + y, z is a third vector (z is cleared)

Parameters

a	REAL factor a
x	Pointer to dvector x
y	Pointer to dvector y
z	Pointer to dvector z

Author

Chensong Zhang

Date

07/01/2009

Modified by Chunsheng Feng, Xiaoqiang Yue on 05/23/2012

Definition at line 96 of file BlaVector.c.

fasp_blas_dvec_dotprod()

REAL fasp_blas_dvec_dotprod	(	const dvector *	x,
		const dvector *	y
	)

Inner product of two vectors (x,y)

Parameters

x	Pointer to dvector x
y	Pointer to dvector y

Returns

Inner product

Author

Chensong Zhang

Date

07/01/2009

Modified by Chunsheng Feng, Xiaoqiang Yue on 05/23/2012

Definition at line 236 of file BlaVector.c.

fasp_blas_dvec_norm1()

REAL fasp_blas_dvec_norm1

(

const dvector *

x

)

L1 norm of dvector x.

Parameters

x	Pointer to dvector x

Returns

L1 norm of x

Author

Chensong Zhang

Date

07/01/2009

Modified by Chunsheng Feng, Xiaoqiang Yue on 05/23/2012

Definition at line 130 of file BlaVector.c.

fasp_blas_dvec_norm2()

REAL fasp_blas_dvec_norm2

(

const dvector *

x

)

L2 norm of dvector x.

Parameters

x	Pointer to dvector x

Returns

L2 norm of x

Author

Chensong Zhang

Date

07/01/2009

Definition at line 170 of file BlaVector.c.

fasp_blas_dvec_norminf()

REAL fasp_blas_dvec_norminf

(

const dvector *

x

)

Linf norm of dvector x.

Parameters

x	Pointer to dvector x

Returns

L_inf norm of x

Author

Chensong Zhang

Date

07/01/2009

Definition at line 208 of file BlaVector.c.

fasp_blas_dvec_relerr()

REAL fasp_blas_dvec_relerr	(	const dvector *	x,
		const dvector *	y
	)

Relative difference between two dvector x and y.

Parameters

x	Pointer to dvector x
y	Pointer to dvector y

Returns

Relative difference ||x-y||/||x||

Author

Chensong Zhang

Date

07/01/2009

Modified by Chunsheng Feng, Xiaoqiang Yue on 05/23/2012

Definition at line 278 of file BlaVector.c.