Smoothing Algorithm

Smoother

const int numReadings = 10;

int readings[numReadings];      // the readings from centroid.x
int index = 0;                  // the index of the current reading
int total = 0;                  // the running total
int average = 0;                // the average

int inputPin = A0;

void setup()
{
  // initialize all the readings to 0: 
  for (int thisReading = 0; thisReading < numReadings; thisReading++)
    readings[thisReading] = 0;          
}

void update() {

  // subtract the last reading:
  total= total - readings[index];
         
  // read from the sensor:  
  readings[index] = analogRead(inputPin);
 
  // add the reading to the total:
  total= total + readings[index];
       
  // advance to the next position in the array:  
  index = index + 1;                    

  // if we're at the end of the array...
  if (index >= numReadings)              
    // ...wrap around to the beginning: 
    index = 0;                           

  // calculate the average:
  average = total / numReadings;         
         
}