On Sun, Nov 10, 2024 at 1:27 PM Sven Schreiber <sven.schrei...@fu-berlin.de> wrote: > > Hello everybody, > > I'm currently looking at ch. 21 of the guide, "Cheat sheet". I'd propose > the following cleanups (which I could apply if people agree): > > section 21.1: > > - Time averaging of panel datasets: I think it would be nice to use a > real-world dataset such as grunfeld.gdt instead of having the slightly > distracting code for creation of artificial data. > > section 21.2: > > - Generating a dummy variable for a specific observation: Instead of > t=="Italy" one can also write obs=="Italy", which may be more intuitive > for cross-sectional data. > > - Generating a “subset of values” dummy: Nowadays one could use the > contains() function I think, which would be more readable. > > section 21.3: > > - Interaction dummies (p. 194 of the A4 guide version from October): > remove the old string-substitution-based code that pre-dates the > interaction operator (^; which is also already mentioned there). > > - Realized volatility: Is this example even consistent? It starts by > talking about minutes and hours, but then switches over to seconds and > minutes. Maybe that's part of the clever trick, I don't know... Apart > from that, it seems that another trick in the cheat sheet could be > re-used here, namely "Moving functions for time series". > > - Looping over two paired lists: Can't this one be generalized, by using > Lx[i] and Ly[i] instead of y$i and x$i ? > > - Cross-validation: Could it be that using some feature of the regls > apparatus or a contributed package (by Artur?) would be more practical > nowadays? > > - Is my matrix result broken? - One could now use sum() instead of > sumc(sumr()).
These are all good points. Let's see if we can address them. Allin _______________________________________________ Gretl-devel mailing list -- gretl-devel@gretlml.univpm.it To unsubscribe send an email to gretl-devel-le...@gretlml.univpm.it Website: https://gretlml.univpm.it/postorius/lists/gretl-devel.gretlml.univpm.it/
