David <[email protected]> wrote: > On Fri, 6 Feb 2026 at 09:40, Chris Green <[email protected]> wrote: > > Svetlana Tkachenko <[email protected]> wrote: > > > Arno Lehmann wrote: > > > > > have a look at gnuplot. > > > > +1, gnuplot is easy to use for me. How does it work for you, Chris? > > > The trouble with gnuplot (and many others) is that they are aimed at > > plotting functions rather than raw data. > > > > I've looked at the 2D examples at > > https://gnuplot.sourceforge.net/demo_6.0/ and none of them show a simple > > value (i.e. raw data) versus time plot which is what I'm after. > > > > I realise that it can be done in gnuplot (running_avg.dem is sort of some > > of the way there) but something aimed specifically at time plots, > > especially with the ability to squeeze the horizontal (time) ticks would > > be much closer to what I'm specifically looking for. > > Hi, > > Does this do what you want? > > $ cat values > 1 2 > 3 3 > 4 4 > 5 3 > 6.5 1.2 > > $ gnuplot > gnuplot> set style line 1 lc rgb '#0060ad' lt 1 lw 1 pt 7 pi -1 ps 1 > gnuplot> set pointintervalbox 1.25 > gnuplot> plot "values" using 1:2 with lp ls 1 > > If that does not do what you want, can you explain more clearly what you > mean by "squeezing" the x-axis.
No, it doesn't really address the issue, or at least I don't think it does, I may be misunderstanding though. I have more X values than will fit across the screen as discrete points. So, for a day's results, I have 1440 x values, going from 0 to 1339 (minutes in a day). One of the sets of y values will simply be a battery voltage, probably in the range 10v to 15v. I want to have a plot which shows how the voltage varies over the 24 hours (1440 minutes) of the day with, say, the hour of the day shown on the x-axis. -- Chris Green ยท
