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Computing lowess mean value
I am trying to reimplement lowess algorithm in java. I read in the matlab page explaining the lowess with the follwing steps:
Compute the regression weights for each data point in the span.
A ...
4
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Negative weights in a moving average?
A number of well known moving averages, such as Spencer's 15 point MA, and Henderson moving averages have negative weights in the averages.
What does this mean in a conceptual sense? What information ...
