Thanks Eliya
Here's the simplified sample set 

position     value
1    1
10    3
30    1
40    2
60    2

[download]

And here the output for window size of 30

1-30   1.666666667
31-60  2

[download]

In reply to Re^3: calculate average in sliding windows by marfabe
in thread calculate average in sliding windows by marfabe

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