PAA with reduced number of loops to compute the segments #4
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Iterating over series_len * paa_segement to calculate the PAA series
might take very long. Instead we precompute the series break points
for the segmentation and iterate only once over the series.
Edit: I think this is as good as it gets now. I did some tests and compared
the resulting series with the results of the original PAA implementation and
the deltas were within +/- 10^-11.