I am looking for a good way to smooth noisy input. I will use noisy devices - a gyro and video tracked cursor data - they produce very jumpy data. 

So far i have tried putting values in an array and averaging them. Works passably with small deviations. But i am guessing there should be something like a "lowpass filter" way of doing it, or even some others that i don't know. 

Any ideas are very appreciated. (also on improving current code)

below is my code so far... 

2. int buffSz = 10;
3. int[] myBufferX = new int[buffSz];
4. int[] myBufferY = new int[buffSz];
5. 
   
6. void setup() {
7.   size(400, 400);
8.   smooth();
9. }
10. void draw() { 
11.   background(0);
12.   strokeWeight(2);
13.   stroke(255);
14.   fill(255);
15. 
    
16. 
    
17.   addInt(width/2+(int)random(20), height/2+(int)random(20));
18. 
    
19.   //println("avr X " +avrX());
20.   //println("avr Y " +avrY());
21.   ellipse(avrX(), avrY(), 40, 40);
22. }
23. 
    
24. //FIFO queue
25. 
    
26. void addInt(int newIntX, int newIntY) {
27.   for (int i=buffSz-1; i>0; i--) {
28.     myBufferX[i] = myBufferX[i-1];
29.   }
30. 
    
31.   for (int j=buffSz-1; j>0; j--) {
32.     myBufferY[j] = myBufferY[j-1];
33.   }
34.   myBufferX[0] = newIntX;
35.   myBufferY[0] = newIntY;
36. }
37. 
    
38.  //average of Y coordinates
39.  
40.  int avrX() {
41.  
42.  int total=0;
43.  int avrX=mouseX;
44.  
45.  for (int i=buffSz-1; i>=0; i--) {
46.  total+=myBufferX[i];
47.  avrX=total/buffSz;
48.  
49.  }
50.  return avrX;
51.  
52.  }
53.  
54. // average of Y coordinates
55. 
    
56. int avrY() {
57. 
    
58.   int total=0;
59.   int avrY=mouseY;
60. 
    
61.   for (int b=buffSz-1; b>=0; b--) {
62.     total+=myBufferY[b];
63.     avrY=total/buffSz;
64.     //println(avrY);
65.   }
66.   return avrY;
67. }