[Octave-bug-tracker] [bug #49494] rescaling axes does not modify gca.ylim

[Clinton Winant]

URL:
  <http://savannah.gnu.org/bugs/?49494>

                 Summary: rescaling axes does not modify gca.ylim
                 Project: GNU Octave
            Submitted by: cwinant
            Submitted on: Mon 31 Oct 2016 08:01:05 PM GMT
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Clinton Winant
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.0-rc2
        Operating System: GNU/Linux

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Details:

The enclosed script plots a straight line twice.  Both the script and
resulting figure are attached. In the right hand plot, the y-axis tick mode
has been set to manual.  Since the right and left plots are not the same, I
conclude that the y-axis has been rescaled by the set(gca... call.  However a
subsequent call to gca shows that ylim is the same for both plots.  As a
result the line "rescale" is placed correctly in only the left hand plot.
Ubuntu 16.04  gl2ps 1.3.8

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>> subplot(1,2,1)
>> plot([0 1],[-2.02 1.3311],'k','linewidth',2);hold on
>> plot([0 1],[0 0],'k')
>> %%      set(gca,'ytickmode','manual','ytick',[]);
>> sgca=get(gca);
>> text(.1,.5,num2str(sgca.ylim(1),"%3.1f"))
>> text(.3,.5,num2str(sgca.ylim(2),"%3.1f"))
>> text(0.1,sgca.ylim(1),'rescale')
>> %% plot the same thing, but force rescale by turning
>> %% ytickmode to manual
>> subplot(1,2,2)
>> plot([0 1],[-2.02 1.3311],'k','linewidth',2);hold on
>> plot([0 1],[0 0],'k')
>> set(gca,'ytickmode','manual','ytick',[]);
>> sgca=get(gca);
>> text(.1,.5,num2str(sgca.ylim(1),"%3.1f"))
>> text(.3,.5,num2str(sgca.ylim(2),"%3.1f"))
>> text(0.1,sgca.ylim(1),'rescale')





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File Attachments:


-------------------------------------------------------
Date: Mon 31 Oct 2016 08:01:05 PM GMT  Name: debug_rescale.m  Size: 612B   By:
cwinant

<http://savannah.gnu.org/bugs/download.php?file_id=38848>
-------------------------------------------------------
Date: Mon 31 Oct 2016 08:01:05 PM GMT  Name: debug_rescale.eps  Size: 8kB  
By: cwinant

<http://savannah.gnu.org/bugs/download.php?file_id=38849>

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