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> But if you want to give it a try, you should get to the code for 
> autopilot project. 
> 
> http://autopilot.sourceforge.net/ 
> 
> It will give you a good place to start. 
> 
> Personally I generally use a moving average for similar things. 
> Very easy to implement and works ok in most situations. 

Before my first post at piclist I did a good search on google. 

The algorithm is complex and above my skills for now. 

A moving average won't work for my application, as it needs to predict the 
next sample. 

I am trying this code and verifying how good it is. 

ERROR(n-1) = ERROR(n) 

ERROR(n) = ERROR(n-1) + SAMPLE(n) - SAMPLE(n+1) 

SAMPLE(n+1) = SAMPLE(n) * 2 - SAMPLE(n-1) + ERROR(n) 


SAMPLE(n) is the reading from sensor. 

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