Smoothing signals

A simple algorithm to smooth signals in arduino

Solutions to smoothing algorithms. Code below smooths out an analog signal, it needs 3 variables, data (sensor signal) smoothed var and the alpha variable which can be set to change the smoothness.

if (data > smoothed){
     smoothed = smoothed + (data - smoothed)/alpha;
   }else{
     smoothed = smoothed - (smoothed - data)/alpha;
   }
   if (smoothed < alpha){
     smoothed = smoothed - 1;
     if (smoothed < 0){
       smoothed = 0;
     }
   }
   data = smoothed;