Java Array Normalize norm(double[] a)

Description

Description of the Method

License

Open Source License

Parameter

Parameter	Description
a	Description of the Parameter

Return

Description of the Return Value

Declaration

public static double norm(double[] a) 

Method Source Code

//package com.java2s;
/**/*from w  w w  .j av a2 s. c o m*/
*  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 (version 2). 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.
*/

public class Main {
    /**
     *  Description of the Method
     *
     *@param  a  Description of the Parameter
     *@return    Description of the Return Value
     */
    public static double norm(double[] a) {
        return (double) Math.sqrt(innerproduct(a, a));
    }

    public static double norm(double[][] a) {
        double sum = 0.0;
        for (int row = 0; row < a.length; ++row)
            sum += norm(a[row]);
        return sum / a.length;
    }

    /**
     *  Description of the Method
     *
     *@param  a  Description of the Parameter
     *@param  b  Description of the Parameter
     *@return    Description of the Return Value
     */
    public static double innerproduct(final double[] a, final double[] b) {
        double answer = 0;
        for (int i = 0; i < a.length; ++i)
            answer += a[i] * b[i];

        return answer;
    }
}

Related

1. norm(byte[] tab)
2. norm(double[] a)
3. norm(double[] a)
4. norm(double[] array)
5. norm(double[] data)
6. norm(double[] v)
7. norm(double[] vector)