signalextraction: Real-Time Signal Extraction (Direct Filter Approach)
The Direct Filter Approach (DFA) provides efficient estimates of
signals at the current boundary of time series in real-time. For
that purpose, one-sided ARMA-filters are computed by minimizing
customized error criteria. The DFA can be used for estimating
either the level or turning-points of a series, knowing that both
criteria are incongruent. In the context of real-time turning-
point detection, various risk-profiles can be operationalized,
which account for the speed and/or the reliability of the one-
sided filter.
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