Java Array Normalize normalize(double[] vector)

Description

normalize

License

Apache License

Declaration

public static double[] normalize(double[] vector) 

Method Source Code

//package com.java2s;
/**/*from  w ww. j  a v  a 2  s  .co m*/
 * Copyright 2013-2015 Pierre Merienne
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    public static double[] normalize(double[] vector) {
        double magnitude = magnitude(vector);
        return magnitude != 0 ? mult(vector, 1 / magnitude) : vector;
    }

    public static double magnitude(double[] vector) {
        double magnitude = 0.0;
        for (int i = 0; i < vector.length; i++) {
            magnitude += Math.pow(vector[i], 2);
        }

        return Math.sqrt(magnitude);
    }

    public static double[] mult(double[] vector, double scalar) {
        int length = vector.length;
        double[] result = new double[length];
        for (int i = 0; i < length; i++) {
            result[i] = vector[i] * scalar;
        }
        return result;
    }
}

Related

1. normalize(double[] v)
2. normalize(double[] v)
3. normalize(double[] vals)
4. normalize(double[] values)
5. normalize(double[] values)
6. normalize(double[] vector)
7. normalize(double[] w)
8. normalize(double[] weights)
9. normalize(double[] weights)