Groups > comp.graphics.apps.gnuplot > #1563

Re: Image or special files do not work on y2 axis?

From	sfeam <sfeam@users.sourceforge.net>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: Image or special files do not work on y2 axis?
Followup-To	comp.graphics.apps.gnuplot
Date	2012-12-31 12:09 -0800
Organization	gnuplot development team
Message-ID	<kbsrdr$t2n$1@dont-email.me> (permalink)
References	<ak8bmvFf1e8U1@mid.individual.net> <kbnq29$kqb$1@dont-email.me> <akaicaFtjnaU1@mid.individual.net>

Followups directed to: comp.graphics.apps.gnuplot

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Ingo Thies wrote:

> Hi Ethan!
> 
>> I believe the problem is that autoscaling (set yrange [0:*])
>> cannot be combined with either sampling (plot '++' ...)
>> It requires an explicit range over which the samples are generated.
> 
> This is also my thought since  recently added a comment to feature
> request #3589786 about a way to get gradient-fill with filledcurves.
> This requires to create the gradient as an image plot (which is then
> partially hidden by the fill above the curve; this results in a gradient
> pattern below the curve).
> 
> I tried, as a workaround, to determine the plot limits (which are not
> previously known and vary strongly from datafile to datafile) with a
> preceeding dummy plot to table ("set table") and writeback option. But
> for some reason, writeback & restore doesn't work with tables, so the
> only remaining solution was a dummy plot to the screen which is
> overwritten afterwards. The limits can then be accessed by restore or
> explicitely with GPVAL_Y_MIN and GPVAL_Y_MAX.

4.6 and 4.7 provide the "stats" command for this purpose.

	Ethan

 
> So, a good solution would be a fix to writeback&restore with table plots
> to avoid temporary pop-up plots.
> 
> Thanks so far,
> 
> Ingo

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Thread

Image or special files do not work on y2 axis? Ingo Thies <ingo.thies@gmx.de> - 2012-12-29 15:06 +0100
  Re: Image or special files do not work on y2 axis? sfeam <sfeam@users.sourceforge.net> - 2012-12-29 14:15 -0800
    Re: Image or special files do not work on y2 axis? Ingo Thies <ingo.thies@gmx.de> - 2012-12-30 11:12 +0100
      Re: Image or special files do not work on y2 axis? sfeam <sfeam@users.sourceforge.net> - 2012-12-31 12:09 -0800
        Re: Image or special files do not work on y2 axis? Ingo Thies <ingo.thies@gmx.de> - 2013-01-01 13:36 +0100

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