Re: [Gretl-devel] pmean and lists versus mean and lists
On Thu, 20 Dec 2018, Sven Schreiber wrote:
Hi,
I'll admit right away that this question has no real practical problem behind
it, it's just out of internal consistency:
The mean() function accepts a list and then averages across the members of
the list (and returns a series of per-obs-averages).
In contrast, the pmean() function doesn't have this second use, it only
accepts one series (as does mean). Any particular reason why not?
The same goes for pmax(), pmin(), psd(), psum(), and perhaps also pxsum(), I
guess.
Well, this makes sense I suppose, snce pmean() and friends are supposed to
operate "vertically", so to speak, through time, so I can't really imagine
what you might want to have with a list argument. Perhaps pmean(mean(X))?
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Riccardo (Jack) Lucchetti
Dipartimento di Scienze Economiche e Sociali (DiSES)
Università Politecnica delle Marche
(formerly known as Università di Ancona)
r.lucchetti(a)univpm.it
http://www2.econ.univpm.it/servizi/hpp/lucchetti
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