Compute the length of a vector - Java java.lang

Java examples for java.lang:Math Vector

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Description

Compute the length of a vector

Demo Code

/*//from w  w w . j  a v  a  2s .  c  om
 * Copyright (C) 2014 University of Freiburg.
 *
 * 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.
 */
//package com.java2s;
import java.util.Collection;

public class Main {
    /**
     * Compute the length of a vector
     * 
     * @param vector
     *          List representing the vector
     * @return The length of the vector
     */
    public static double computeVectorLength(Collection<Double> vector) {
        double length = 0;
        for (Double value : vector) {

            double squared = Math.pow(value, 2);
            length += squared;
        }
        return Math.sqrt(length);
    }
}

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