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/* $Id: nlm_linear_algebra.h,v 1.6 2005/12/01 13:54:04 gertz Exp $
* ===========================================================================
*
* PUBLIC DOMAIN NOTICE
* National Center for Biotechnology Information
*
* This software/database is a "United States Government Work" under the
* terms of the United States Copyright Act. It was written as part of
* the author's official duties as a United States Government employee and
* thus cannot be copyrighted. This software/database is freely available
* to the public for use. The National Library of Medicine and the U.S.
* Government have not placed any restriction on its use or reproduction.
*
* Although all reasonable efforts have been taken to ensure the accuracy
* and reliability of the software and data, the NLM and the U.S.
* Government do not and cannot warrant the performance or results that
* may be obtained by using this software or data. The NLM and the U.S.
* Government disclaim all warranties, express or implied, including
* warranties of performance, merchantability or fitness for any particular
* purpose.
*
* Please cite the author in any work or product based on this material.
*
* ===========================================================================*/
/**
* @file nlm_linear_algebra.h
*
* @author E. Michael Gertz
*
* Declarations for several linear algebra routines
*/
#ifndef __NLM_LINEAR_ALGEBRA__
#define __NLM_LINEAR_ALGEBRA__
#include <algo/blast/core/blast_export.h>
#include <algo/blast/core/ncbi_std.h>
#ifdef __cplusplus
extern "C" {
#endif
NCBI_XBLAST_EXPORT
double ** Nlm_DenseMatrixNew(int nrows, int ncols);
NCBI_XBLAST_EXPORT
double ** Nlm_LtriangMatrixNew(int n);
NCBI_XBLAST_EXPORT
void Nlm_DenseMatrixFree(double *** mat);
NCBI_XBLAST_EXPORT
Int4 ** Nlm_Int4MatrixNew(int nrows, int ncols);
NCBI_XBLAST_EXPORT
void Nlm_Int4MatrixFree(Int4 *** mat);
NCBI_XBLAST_EXPORT
void Nlm_FactorLtriangPosDef(double ** A, int n);
NCBI_XBLAST_EXPORT
void Nlm_SolveLtriangPosDef(double x[], int n, double ** L);
NCBI_XBLAST_EXPORT
double Nlm_EuclideanNorm(const double v[], int n);
NCBI_XBLAST_EXPORT
void Nlm_AddVectors(double y[], int n, double alpha,
const double x[]);
NCBI_XBLAST_EXPORT
double Nlm_StepBound(const double x[], int n,
const double step_x[], double max);
#ifdef __cplusplus
}
#endif
#endif
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