How to find correlation between two integer arrays in java

Question

I am searching a lot but could not find exactly what i need till now. I have two integer arrayas int[] x and int[] y. I want to find simple linear

Answer 1

There is nothing in core Java. There are libraries out there you can use. Apache Commons has a statistical project, check PearsonCorrelation class.

Sample code:

public static void main(String[] args) {
    double[] x = {1, 2, 4, 8};
    double[] y = {2, 4, 8, 16};
    double corr = new PearsonsCorrelation().correlation(y, x);

    System.out.println(corr);
}

prints out 1.0