Question

Create a JAVA class that reads data from two arrays and calculates the correlation coefficient.

Answer 1

Solution

class CorrelationCoefficient{
int[] A;
int[] B;
public CorrelationCoefficient(int n,int[] A,int[] B)
{
this.A = new int[n];
this.B = new int[n];
this.A = A;
this.B = B;
}
public float getCorrelationCoefficient(int n)
{
int sumA = 0, sumB = 0, sumAB = 0;
int squareSumA = 0, squareSumB = 0;
float soln = 0;
for(int i = 0;i<n;i++)
{
sumA += A[i];
sumB += B[i];
sumAB += A[i]*B[i];
squareSumA += A[i]*A[i];
squareSumB += B[i]*B[i];
}
soln = (float)(n*sumAB - sumA*sumB)/(float)(Math.sqrt((n*squareSumA - sumA*sumA)*(n*squareSumB - sumB*sumB)));
return soln;
}
  
}
public class Main
{
   public static void main(String[] args) {
   int[] A = {15,18,21,24,27};
   int[] B = {25,25,27,31,32};
   int n = 5;
   CorrelationCoefficient CC = new CorrelationCoefficient(5,A,B);
  
       System.out.println("Correlation Coefficient : " + CC.getCorrelationCoefficient(n));
   }
}

Output

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