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))? ------------------------------------------------------- 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 -------------------------------------------------------
