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

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!

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?”