Groups > comp.graphics.apps.gnuplot > #1561

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

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From	Ingo Thies <ingo.thies@gmx.de>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: Image or special files do not work on y2 axis?
Date	Sun, 30 Dec 2012 11:12:26 +0100
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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.

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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