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Index › Programming Questions & Help › Programs › Smoothing Data
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Smoothing Data ? (Read 575 times)
zooto68
Smoothing Data ?
Oct 27th, 2008, 12:21pm  
Can anyone tell me an easy solution for smoothing data for a graph? I am reading in temperatures from 2 temp sensors (DS18B20) and the temperatures are read everyu 30 seconds. When plotted on a graph the trace is very rough as the temperature goes up and down by approx 0.5 degrees from time to time (I am presuming it is noise somewhere).

What is a good way of smoothing the data out to give a smoother and more accurate trace on the graph please?
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Amateur Astronomer/Astrophotographer and Electronics Hobbyist.
 
zooto68
Re: Smoothing Data ?
Reply #1 - Oct 27th, 2008, 3:55pm  
OK I think I am able to answer my own question. I am going to use a 'moving average' of the data by averaging a set of 5 data points to include the 2 before and after the point in the array, e.g. :-

([D-2] [D-1] [D] [D+1] [D+2]) / 5


On some test data this smoothed the graph nicely.
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Amateur Astronomer/Astrophotographer and Electronics Hobbyist.
 
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