quadraticproblem.java

一个很好的LIBSVM的JAVA源码。对于要研究和改进SVM算法的学者。可以参考。来自数据挖掘工具YALE工具包。

/*
 *  YALE - Yet Another Learning Environment
 *  Copyright (C) 2001-2004
 *      Simon Fischer, Ralf Klinkenberg, Ingo Mierswa, 
 *          Katharina Morik, Oliver Ritthoff
 *      Artificial Intelligence Unit
 *      Computer Science Department
 *      University of Dortmund
 *      44221 Dortmund,  Germany
 *  email: [e-mail]
 *  web:   http://yale.cs.uni-dortmund.de/
 *
 *  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.
 */
package edu.udo.cs.mySVM.Optimizer;

public abstract class quadraticProblem
{
    /*
     *
     *  A quadratic optimization problem
     *
     */

    // Public variables that describe the quadratic problem
    protected int n; // number of variables
    static int m=1; // number of linear constraints, 1 for now
    
    public double[] c;
    public double[] H;  // c' * x + 1/2 x' * H * x -> min
    public double[] A;
    public double[] b;  // A * x = b
    public double[] l;
    public double[] u;  // l <= x <= u
    public double[] x; 

    public double max_allowed_error;

    public quadraticProblem(){
	n = 0;
	lambda_eq=0.0d;
    };


    public void set_n(int new_n){
	n = new_n;
	c = new double[n];
	H = new double[n*n];
	A = new double[n];
	b = new double[n];
	l = new double[n];
	u = new double[n];
	x = new double[n];
    };


    public int get_n(){
	return(n);
    };


    public double lambda_eq;
    protected abstract void calc_lambda_eq();

    public abstract int solve();
};