DoubleVector.java

/*
 Copyright (C) 2010 by
 * 
 * 	Cam-Tu Nguyen	ncamtu@ecei.tohoku.ac.jp ncamtu@gmail.com
 *  Xuan-Hieu Phan  pxhieu@gmail.com 
 
 *  College of Technology, Vietnamese University, Hanoi
 * 
 * 	Graduate School of Information Sciences
 * 	Tohoku University
 *
 *  JVnTextPro-v.2.0 is a 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.
 *
 * JVnTextPro-v.2.0 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  JVnTextPro-v.2.0); if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 */

package jflexcrf;

// TODO: Auto-generated Javadoc
/**
 * The Class DoubleVector.
 */
public class DoubleVector {
    
    /** The vect. */
    public double[] vect = null;
    
    /** The len. */
    public int len = 0;
    
    /**
     * Instantiates a new double vector.
     */
    public DoubleVector() {
	len = 0;
	vect = null;
    }
    
    /**
     * Instantiates a new double vector.
     *
     * @param len the len
     */
    public DoubleVector(int len) {
	this.len = len;
	vect = new double[len];
    }
    
    /**
     * Instantiates a new double vector.
     *
     * @param len the len
     * @param vect the vect
     */
    public DoubleVector(int len, double[] vect) {
	this.len = len;
	this.vect = new double[len];
	for (int i = 0; i < len; i++) {
	    this.vect[i] = vect[i];
	}
    }
    
    /**
     * Instantiates a new double vector.
     *
     * @param dv the dv
     */
    public DoubleVector(DoubleVector dv) {
	len = dv.len;
	vect = new double[len];
	for (int i = 0; i < len; i++) {
	    vect[i] = dv.vect[i];
	}
    }
    
    /**
     * Size.
     *
     * @return the int
     */
    public int size() {
	return len;
    }
    
    /**
     * Assign.
     *
     * @param val the val
     */
    public void assign(double val) {
	for (int i = 0; i < len; i++) {
	    vect[i] = val;
	}
    }
    
    /**
     * Assign.
     *
     * @param dv the dv
     */
    public void assign(DoubleVector dv) {
	for (int i = 0; i < len; i++) {
	    vect[i] = dv.vect[i];
	}
    }
    
    /**
     * Sum.
     *
     * @return the double
     */
    public double sum() {
	double res = 0.0;
	for (int i = 0; i < len; i++) {
	    res += vect[i];
	}
	return res;	
    }
    
    /**
     * Comp mult.
     *
     * @param val the val
     */
    public void compMult(double val) {
	for (int i = 0; i < len; i++) {
	    vect[i] *= val;
	}
    }
    
    /**
     * Comp mult.
     *
     * @param dv the dv
     */
    public void compMult(DoubleVector dv) {
	for (int i = 0; i < len; i++) {
	    vect[i] *= dv.vect[i];
	}
    }

} // end of class DoubleVector