Description Usage Arguments Note
Two input parameters: It receives the edges to cut at: "begin" and "end".
The resulting trend are saved for their contribution to each year yield. If a trend ends before the time series data, it's results are preserved (and not increased) in the following years.
1 2 | #called by sewTrends()
cutTrend(inizio, fine)
|
inizio |
is the lower year (included) of the trended lapse |
fine |
is the upper year (included) of the trended lapse |
The lower year included in the trend comes out as it get in. Considering that the trand is, at that time, experiencing the year of its start no changes actually occur.
Mathematically, the trend is accounted to be linear, and so described by the following:
$yield_n~unTrended= yield_n~Offical - ( year_n - year_startTrend ) * Trend_coefficient $
So that is clear that for n = startTrend (aka "inizio") it is that the trend and the unTrended versions of yield are the same.
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