qrecipe.cpp

/*
 *	This file is part of qpOASES.
 *
 *	qpOASES -- An Implementation of the Online Active Set Strategy.
 *	Copyright (C) 2007-2017 by Hans Joachim Ferreau, Andreas Potschka,
 *	Christian Kirches et al. All rights reserved.
 *
 *	qpOASES is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU Lesser General Public
 *	License as published by the Free Software Foundation; either
 *	version 2.1 of the License, or (at your option) any later version.
 *
 *	qpOASES 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 Lesser General Public License for more details.
 *
 *	You should have received a copy of the GNU Lesser General Public
 *	License along with qpOASES; if not, write to the Free Software
 *	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */


/**
 *	\file examples/qrecipe.cpp
 *	\author Andreas Potschka
 *	\version 3.2
 *	\date 2007-2017
 *
 *	QRECIPE example from the CUTEr test set with sparse matrices.
 */



#include <qpOASES.hpp>

#include "qrecipe_data.hpp"



int main( )
{
	USING_NAMESPACE_QPOASES

	long i;
	int_t nWSR;
	real_t err, tic, toc;
	real_t *x1 = new real_t[180];
	real_t *y1 = new real_t[271];
	real_t *x2 = new real_t[180];
	real_t *y2 = new real_t[271];

	/* create sparse matrices */
	SymSparseMat *H = new SymSparseMat(180, 180, H_ri, H_cp, H_val);
	SparseMatrix *A = new SparseMatrix(91, 180, A_ri, A_cp, A_val);

	H->createDiagInfo();

	real_t* H_full = H->full();
	real_t* A_full = A->full();

	SymDenseMat *Hd = new SymDenseMat(180,180,180,H_full);
	DenseMatrix *Ad = new DenseMatrix(91,180,180,A_full);

	/* solve with dense matrices */
	nWSR = 1000;
	QProblem qrecipeD(180, 91);
	tic = getCPUtime();
	qrecipeD.init(Hd, g, Ad, lb, ub, lbA, ubA, nWSR, 0);
	toc = getCPUtime();
	qrecipeD.getPrimalSolution(x1);
	qrecipeD.getDualSolution(y1);

	fprintf(stdFile, "Solved dense problem in %d iterations, %.3f seconds.\n", (int)nWSR, toc-tic);

	/* solve with sparse matrices */
	nWSR = 1000;
	QProblem qrecipeS(180, 91);
	tic = getCPUtime();
	qrecipeS.init(H, g, A, lb, ub, lbA, ubA, nWSR, 0);
	toc = getCPUtime();
	qrecipeS.getPrimalSolution(x2);
	qrecipeS.getDualSolution(y2);

	fprintf(stdFile, "Solved sparse problem in %d iterations, %.3f seconds.\n", (int)nWSR, toc-tic);

	/* check distance of solutions */
	err = 0.0;
	for (i = 0; i < 180; i++)
		if (getAbs(x1[i] - x2[i]) > err)
			err = getAbs(x1[i] - x2[i]);
	fprintf(stdFile, "Primal error: %9.2e\n", err);
	err = 0.0;
	for (i = 0; i < 271; i++)
		if (getAbs(y1[i] - y2[i]) > err)
			err = getAbs(y1[i] - y2[i]);
	fprintf(stdFile, "Dual error: %9.2e  (might not be unique)\n", err);

	delete H;
	delete A;
	delete[] H_full;
	delete[] A_full;
	delete Hd;
	delete Ad;

	delete[] y2;
	delete[] x2;
	delete[] y1;
	delete[] x1;

	return 0;
}


/*
 *	end of file
 */