but it doesn't take into account the positions in column 1

Sorry, I'm still not sure what you want (and it's a little diffficult to infer it from code which - as you state - doesn't work).

Are you saying the positions in column 1 are meant to represent indices in some sparse array, with all unspecified positions (such as 12498249..12512574, etc.) implicitly having a value of zero, or what?

I think it would help if you could come up with some simplified (but sufficient/complete) sample input (say using a window size of 3) together with the desired output values.

In reply to Re^2: calculate average in sliding windows by Eliya
in thread calculate average in sliding windows by marfabe

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