Am 19.11.2021 um 19:46 schrieb Rigoberto Perez Suarez:
Hello, I have been following the interesting debate on X13a and TRAMO-SEATS, and I support the idea raised by Sven about jDemetra+.
Thanks, Rigoberto. But to avoid any misunderstanding, let me be clear that I wasn't suggesting to port or adapt anything from JDemetra+. And since it is a Java program, I believe it would also be a bit more difficult to call it from gretl than it currently is to call X12/X13 or Tramo.
In my opinion deseas() is extremely helpful, but it would also be interesting to have some additional function providing for instance the Trend-cycle component (quite useful in signal extraction or quartering of time series).
If I understand correctly, that is what Allin's idea would do; you would get an option to request the Trend-Cycle thing just like you can in the GUI. @Allin and @jack, there's the complication that when you request several series (components) as output, how should those be returned? Inside the options bundle in pointer form? We don't want to necessitate several redundant calls to deseas, I guess. thanks sven
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