Re: prev/next scaling history

[sfeam (E. Merritt) <eam...@gm...>]

On Friday, 30 August 2013, pl...@pi... wrote:
> On 08/31/13 01:47, sfeam <Ethan A Merritt> wrote:
> > On Friday, 30 August, 2013 21:45:50 pl...@pi... wrote:
> >> Hi,
> >>
> >> this is only a niggle but a niggle that bugs me every day and every time
> >> I use gnuplot.
> >>
> >> Why isn't "auto-scale" included in the history of scaling values stored
> >> for the previous/next scale feature.
> >>
> >> eg
> >>
> >> reset
> >> plot datafile w l
> >> set xr [1:10]; replot
> >>
> >> now in an interactive terminal (eg wxt) I hit "p" but instead of it
> >> returning to autoscale it jumps to some scaling I used yesterday on a
> >> different plot. ie , the last NON autoscale setting of xr.
> >>
> >> Equally, if I explicitly set 'auto' and then zoom to some other setting,
> >>    it does not get counted next time I do 'previous'.
> >>
> >> Is there a problem with including auto as a value in the scaling history?
> >
> > Could it be that you are looking for the "u" hot key?
> >
> > 	Ethan
> >
> >
> 
> Thanks but no.
> 
>   p              `builtin-zoom-previous` go to previous zoom in the zoom 
> stack
>   u              `builtin-unzoom`
> 
> I'm talking about the unzoomed (autoscaled) state being included in the 
> zoom stack.
> ie first plot would put "auto" onto the zoom stack as would reset; replot

But "auto" is not a zoom state at all.
I don't see how it fits in with n/p.

> 
> eg
> 
> reset
> set xr [1:50]
> plot datafile w l
> set auto; replot
> set xr [1:10]; replot

Gnuplot keeps no history of previous plots.
Once you say "set xr [1:10]; plot", that's it, boom, all the
previous states are gone.  
The [1:50] resulting plot is not there any more;
the autoscaled resulting plot is not there any more either.

All that n/p/u can do is work with the base state of the
current plot.


> then pressing p hotkey would take me to the unzoomed state not [1:50] as 
> it currently does.

Um.  Are you sure that's what it currently does? 
The sequence of commands you give above does not
act that way when I try it here.
I don't recall ever seeing anything like you describe.


> a second "p" would then take me to [1:50]
> 
> Although set auto is the "unzoomed" state it is a finite scaling option 
> that has been viewed and likely explicitly set.
> 
> The special treatment of this scaling is disrouting and frequently 
> rather inconvenient.
> 
> I hope that's clearer.

It's clearer in the sense that you really do want a scaling history.
But the program doesn't currently keep anything of the sort,
so it would be a major change.  About the same difficulty as
the recurring request for zoomable multiplots, and for much
the same reason.  The necessary information is not available.

	Ethan