Re: [Gretl-users] gnuplot: 2nd yaxis

On Fri, 27 Feb 2015, Artur T. wrote: > I've got another question regarding gnuplot. At the moment gretl > automatically draws a 2nd yaxis (if it is not suppressed by the > "--single-yaxis" option) if a certain criteria is fulfilled. However, > is there a way to specify manually a separate variable (or a list of > vars) to a 2nd yaxis? Not within gretl's "gnuplot" command; you'd have to take charge of that yourself.

printf "set timefmt \"%Y%m\" \n"

Reverting to the time data business for a moment: what actually happens here is that if you specify "set xdata time" gnuplot rewrites the x-axis values as seconds since some reference point -- in current gnuplot that's the unix "epoch" which begins at the start of 1970. So a preset x range based on your x numbers in the 200-thousands would translate to a few hours or days in January 1970. No wonder no data were shown! We now (CVS) try to be a little smarter: we check if the "literal" argument to gnuplot contains "set xdata time", and if so we don't attempt to set the x range. We print an x-range setting in gretl-generated gnuplot scripts only because sometimes this seems to come out quite sub-optimally in gnuplot itself. The x range can be "too tight" in that you get data points that are right on the y-axis and therefore hard to see. We try to ensure that there's a little elbow room around the minimum and maximum x-values in the data.

Allin _______________________________________________