AuxVector.c File Reference

Simple vector operations – init, set, copy, etc. More...

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

Go to the source code of this file.

Functions
SHORT	fasp_dvec_isnan (const dvector *u)
	Check a dvector whether there is NAN. More...
dvector	fasp_dvec_create (const INT m)
	Create dvector data space of REAL type. More...
ivector	fasp_ivec_create (const INT m)
	Create vector data space of INT type. More...
void	fasp_dvec_alloc (const INT m, dvector *u)
	Create dvector data space of REAL type. More...
void	fasp_ivec_alloc (const INT m, ivector *u)
	Create vector data space of INT type. More...
void	fasp_dvec_free (dvector *u)
	Free vector data space of REAL type. More...
void	fasp_ivec_free (ivector *u)
	Free vector data space of INT type. More...
void	fasp_dvec_rand (const INT n, dvector *x)
	Generate fake random REAL vector in the range from 0 to 1. More...
void	fasp_dvec_set (INT n, dvector *x, const REAL val)
	Initialize dvector x[i]=val for i=0:n-1. More...
void	fasp_ivec_set (INT n, ivector *u, const INT m)
	Set ivector value to be m. More...
void	fasp_dvec_cp (const dvector *x, dvector *y)
	Copy dvector x to dvector y. More...
REAL	fasp_dvec_maxdiff (const dvector *x, const dvector *y)
	Maximal difference of two dvector x and y. More...
void	fasp_dvec_symdiagscale (dvector *b, const dvector *diag)
	Symmetric diagonal scaling D^{-1/2}b. More...

Detailed Description

Simple vector operations – init, set, copy, etc.

Note

This file contains Level-0 (Aux) functions. It requires: AuxThreads.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 AuxVector.c.

Function Documentation

fasp_dvec_alloc()

void fasp_dvec_alloc	(	const INT	m,
		dvector *	u
	)

Create dvector data space of REAL type.

Parameters

m	Number of rows
u	Pointer to dvector (OUTPUT)

Author

Chensong Zhang

Date

2010/04/06

Definition at line 105 of file AuxVector.c.

fasp_dvec_cp()

void fasp_dvec_cp	(	const dvector *	x,
		dvector *	y
	)

Copy dvector x to dvector y.

Parameters

x	Pointer to dvector
y	Pointer to dvector (MODIFIED)

Author

Chensong Zhang

Date

11/16/2009

Definition at line 334 of file AuxVector.c.

fasp_dvec_create()

dvector fasp_dvec_create

(

const INT

m

)

Create dvector data space of REAL type.

Parameters

m	Number of rows

Returns

u The new dvector

Author

Chensong Zhang

Date

2010/04/06

Definition at line 62 of file AuxVector.c.

fasp_dvec_free()

void fasp_dvec_free

(

dvector *

u

)

Free vector data space of REAL type.

Parameters

u	Pointer to dvector which needs to be deallocated

Author

Chensong Zhang

Date

2010/04/03

Definition at line 145 of file AuxVector.c.

fasp_dvec_isnan()

SHORT fasp_dvec_isnan

(

const dvector *

u

)

Check a dvector whether there is NAN.

Parameters

u	Pointer to dvector

Returns

Return TRUE if there is NAN

Author

Chensong Zhang

Date

2013/03/31

Definition at line 39 of file AuxVector.c.

fasp_dvec_maxdiff()

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

Maximal difference of two dvector x and y.

Parameters

x	Pointer to dvector
y	Pointer to dvector

Returns

Maximal norm of x-y

Author

Chensong Zhang

Date

11/16/2009

Modified by chunsheng Feng, Zheng Li

Date

06/30/2012

Definition at line 357 of file AuxVector.c.

fasp_dvec_rand()

void fasp_dvec_rand	(	const INT	n,
		dvector *	x
	)

Generate fake random REAL vector in the range from 0 to 1.

Parameters

n	Size of the vector
x	Pointer to dvector

Note

Sample usage:

dvector xapp;

fasp_dvec_create(100,&xapp);

fasp_dvec_rand(100,&xapp);

fasp_dvec_print(100,&xapp);

Author

Chensong Zhang

Date

11/16/2009

Definition at line 192 of file AuxVector.c.

fasp_dvec_set()

void fasp_dvec_set	(	INT	n,
		dvector *	x,
		const REAL	val
	)

Initialize dvector x[i]=val for i=0:n-1.

Parameters

n	Number of variables
x	Pointer to dvector
val	Initial value for the vector

Author

Chensong Zhang

Date

11/16/2009

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

Definition at line 222 of file AuxVector.c.

fasp_dvec_symdiagscale()

void fasp_dvec_symdiagscale	(	dvector *	b,
		const dvector *	diag
	)

Symmetric diagonal scaling D^{-1/2}b.

Parameters

b	Pointer to dvector
diag	Pointer to dvector: the diagonal entries

Author

Xiaozhe Hu

Date

01/31/2011

Definition at line 410 of file AuxVector.c.

fasp_ivec_alloc()

void fasp_ivec_alloc	(	const INT	m,
		ivector *	u
	)

Create vector data space of INT type.

Parameters

m	Number of rows
u	Pointer to ivector (OUTPUT)

Author

Chensong Zhang

Date

2010/04/06

Definition at line 125 of file AuxVector.c.

fasp_ivec_create()

ivector fasp_ivec_create

(

const INT

m

)

Create vector data space of INT type.

Parameters

m	Number of rows

Returns

u The new ivector

Author

Chensong Zhang

Date

2010/04/06

Definition at line 84 of file AuxVector.c.

fasp_ivec_free()

void fasp_ivec_free

(

ivector *

u

)

Free vector data space of INT type.

Parameters

u	Pointer to ivector which needs to be deallocated

Author

Chensong Zhang

Date

2010/04/03

Note

This function is same as fasp_dvec_free except input type.

Definition at line 164 of file AuxVector.c.

fasp_ivec_set()

void fasp_ivec_set	(	INT	n,
		ivector *	u,
		const INT	m
	)

Set ivector value to be m.

Parameters

n	Number of variables
m	Integer value of ivector
u	Pointer to ivector (MODIFIED)

Author

Chensong Zhang

Date

04/03/2010

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

Definition at line 291 of file AuxVector.c.