/*
 * Copyright (c) 2002-2006 Samit Basu
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef __LeastSquaresSolver_hpp__
#define __LeastSquaresSolver_hpp__

#include "Interpreter.hpp"

/**
 * Solve $$A  X = B$$ in a least-squares sense, where $$A$$ is $$m \times n$$, 
 * and $$B$$ is $$m \times k$$. $$C$$ is $$n \times k$$, and all of the terms 
 * are double precision.  Uses the LAPACK routine dgelsy.
 */
void doubleSolveLeastSq(Interpreter* eval, int m, int n, int k, double *c,
			double *a, double *b);
/**
 * Solve $$A  X = B$$ in a least-squares sense, where $$A$$ is $$m \times n$$, 
 * and $$B$$ is $$m \times k$$. $$C$$ is $$n \times k$$, and all of the terms 
 * are dcomplex precision.  Uses the LAPACK routine zgelsy.
 */
void dcomplexSolveLeastSq(Interpreter* eval,int m, int n, int k, double *c,
			  double *a, double *b);
/**
 * Solve $$A  X = B$$ in a least-squares sense, where $$A$$ is $$m \times n$$, 
 * and $$B$$ is $$m \times k$$. $$C$$ is $$n \times k$$, and all of the terms 
 * are float precision.  Uses the LAPACK routine sgelsy.
 */
void floatSolveLeastSq(Interpreter* eval,int m, int n, int k, float *c,
		       float *a, float *b);
/**
 * Solve $$A  X = B$$ in a least-squares sense, where $$A$$ is $$m \times n$$, 
 * and $$B$$ is $$m \times k$$. $$C$$ is $$n \times k$$, and all of the terms 
 * are complex precision.  Uses the LAPACK routine cgelsy.
 */
void complexSolveLeastSq(Interpreter* eval,int m, int n, int k, float *c,
			 float *a, float *b);
#endif