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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