Java Array Dot Product dotProduct(double[] v, double[] u)

Description

Return the dot product of two vectors v u

License

Open Source License

Parameter

Parameter	Description
v	a nx1 vector
u	a nx1 vector

Return

the scalar dot product

Declaration

public static double dotProduct(double[] v, double[] u) throws Exception 

Method Source Code

//package com.java2s;
/*/* w w  w .j  ava 2 s . c o  m*/
 *  Java Information Dynamics Toolkit (JIDT)
 *  Copyright (C) 2012, Joseph T. Lizier
 *  
 *  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 3 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, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    /**
     * Return the dot product of two vectors v u
     * 
     * @param v a nx1 vector
     * @param u a nx1 vector
     * @return the scalar dot product
     */
    public static double dotProduct(double[] v, double[] u) throws Exception {
        if (v.length != u.length) {
            throw new Exception("Number of entries of v " + v.length + " does not match the number of entries of u "
                    + u.length);
        }
        double result = 0;
        for (int r = 0; r < v.length; r++) {
            result += v[r] * u[r];
        }
        return result;
    }
}

Related

1. dotProduct(double[] a, double[] b)
2. dotProduct(Double[] a, Double[] b)
3. dotProduct(double[] array, int[] indices, double[] values)
4. dotProduct(double[] fv1, double[] fv2)
5. dotProduct(double[] thisVector, double[] thatVector)
6. dotProduct(double[] vector1, double[] vector2)
7. dotProduct(double[] x, double[] y)
8. dotProduct(final double[] a, final double[] b)
9. dotProduct(final double[] anArray, final double[] anotherArray)