Re: [Gretl-users] Questions on boxplot whiskers and interactive mode in loops

On Wed, 4 Dec 2013, Андрей Викторович | Andreï wrote: Dear users and higher beings, > > I have been using gretl for a year, starting from GUI and switching to > scripts now. I have two questions (pertains to x64 version 1.9.14 on Win 7 > and x32 1.9.14 on Debian x32): > > 1. For model pre-testing, a quick look at distributions and outlier search > is useful. However, I find it tedious to invoke qqplot or any other > visualization for every variable every time. I tried to create a loop for > 12 variables, like > loop foreach i price..prefarea > qqplot $i > endloop > ---but all I got is 12 .plt files in the working directory. Gretl executed > the loop in batch mode, but... can the loop be forced to execute the > commands in interactive mode? What is desired is twelve windows popping > up, > just like a single ``qqplot var'' in the console does, just 12 times? > Worse > still, a one-line ``qqplot var'' script run from a script editor creates a > file, too, but what is needed is an immediate visual plot. > The manual and reference contain very few mentionings of interactive mode, > so any help would be appreciated! > You're partially right: you can append the "--output=display" to qqplot and have it work in a loop. However, you're perfectly right in saying that this does not appear in the manual. It will soon, thanks. 2. The manual states that in boxplot diagrams, ``the `whiskers' extend to > the minimum and maximum values''. However, if so, there would be no > outliers! I checked the source code and found an implementation of > whiskers: uq and lq stand for quartiles, then the interquartile range is > defined as d: double d = limit * (plt->uq - plt->lq); double xlo = plt->lq > - d; double xhi = plt->uq + d. By default, the limit is 1.5. Is this a > misprint in the manual? Maybe it should be changed to the lines from the > gnuplot manual, which says, “by default the whiskers extend from each end > of the box for a range equal to 1.5 times the interquartile range?” > You're totally right: the manual description refers to an earlier incarnation of the command and the manual need to be updated: we'll see to it soon. Thanks (and special kudos for having looked at the source code). ------------------------------------------------------- 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 ------------------------------------------------------- _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users