Calculating the inner product of two vectors given as arrays - Java Language Basics

Java examples for Language Basics:Array

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Description

Calculating the inner product of two vectors given as arrays

Demo Code

class Main {/*from  www .  j ava  2  s.  c o  m*/

  static double innerproduct(int[] x, int[] y) {
    double sum = 0.0;
    System.out.println("Dim of vector x:" + x.length + " Dim of vector y:" + y.length);

    for (int i = 0; i < x.length; ++i)
      sum = sum + x[i] * y[i];
    return sum;
  }

  public static void main(String[] args) {
    int dimension = 30;
    int[] v1, v2;

    v1 = new int[dimension];
    v2 = new int[dimension];

    for (int i = 0; i < dimension; i++) {
      v1[i] = (int) (Math.random() * 100); // random int [0,99]
      v2[i] = (int) (Math.random() * 100); // random int [0,99]
    }
    System.out.println("The inner product of v1 and v2 is " + innerproduct(v1, v2));
  }
}

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