processing test code

float w = 1000;
float h = 400;
size(1000,400);

float y = h * 0.8;
strokeWeight(10);

rectMode(CENTER);
line(20, y, w-20, y);
line(20, 20 , 20, h*.8);

//String numbers = "1,2,3,2,1,2,3,2,1,2,3,2,1";
String numbers = "0,1,2,3,2,1,0,1,2,3,2,1,0,1,2,3,4,3,0,3";
int[] data = int(split(numbers, ','));

//println(data);
float abstand = 40;
float shift_x = 20;
float shift_y = h*0.4;

//draw points
int sum = 0;
for (int i = 0; i < data.length; i++) {
  point(i*abstand + shift_x, data[i] * abstand + shift_y);
  sum = sum + data[i];
}

//autokorrelation
int[] x = data;
float[] r = new float[x.length];
for (int m = 0; m < x.length; m++) {
  for (int n = 0; n < x.length; n++) {
    //println(n-m);
    if(n-m > 0) {
      r[m] += data[n] * x[n-m];
    }
  }
  //println("P" + m + ":\t " +r[m]/ r[0]);
  println("P" + m + ":\t " +r[m]);
}
println(r);