Java Vector vectorL2Norm(double[] v)

Description

Computes the L2 norm of the given vector.

License

Open Source License

Parameter

Parameter	Description
v	the vector.

Return

the L2 norm of v.

Declaration

public static double vectorL2Norm(double[] v) 

Method Source Code

//package com.java2s;
/** A collection of mathematical utility functions.
 * <p>//from w  w  w .ja v a2 s . com
 * Copyright (c) 2008 Eric Eaton
 * <p>
 * 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.
 * <p>
 * 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.
 * <p>
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 * @author Eric Eaton (EricEaton@umbc.edu) <br>
 *         University of Maryland Baltimore County
 *
 * @version 0.1
 *
 */

public class Main {
    /** Computes the L2 norm of the given vector.
     * @param v the vector.
     * @return the L2 norm of v.
     */
    public static double vectorL2Norm(double[] v) {
        double norm = 0;
        for (double d : v) {
            norm += Math.pow(d, 2);
        }
        return Math.sqrt(norm);
    }
}

Related

1. vectorDiff(final double[] vecOne, final double[] vecTwo)
2. vectorDir(int vert, int horiz)
3. vectorDistance(double[] vec1, double[] vec2, double power)
4. vectorIndexToUpperTriangularIndices(int numberOfRows, int index)
5. vectorKLDivergence(double v1[], double v2[])
6. vectorLog10(double v1[])
7. vectorMagnitude4D(float[][][][] vec4D)
8. vectorSimilarity(float[] wordVector1, float[] wordVector2)
9. vectorSizeToBucketNum(int vectorSize)