[Octave-bug-tracker] [bug #65734] same bar plot updates don't properly update axes and labels

[Nicholas Jankowski]

URL:
  <https://savannah.gnu.org/bugs/?65734>

                 Summary: same bar plot updates don't properly update axes and
labels 
                   Group: GNU Octave
               Submitter: nrjank
               Submitted: Mon 13 May 2024 01:16:33 PM EDT
                Category: Plotting
                Severity: 2 - Minor
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 9.1.0
         Discussion Lock: Any
        Operating System: Any
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


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Date: Mon 13 May 2024 01:16:33 PM EDT By: Nicholas Jankowski <nrjank>
while writing bar/barh tests for bug #65671, i came upon a few cases where
changes to bar data do not trigger needed updates to axes properties:

1) changing to horizontal results in incorrect yaxis ticks/labels
h = bar (2:4);
set (h, 'horizontal', 'on');

result should be identical, or close too h = barh(2:4).  vertical axis
ticks/labels are not updated however, leaving a number of intermediate values.
 see attached figure comparing both for octave 9.1.0 and matlab. (results are
independent of the pending patch for bug #65671)

2) changing xdata moves the bars but fails to update xlim and xticks to
match:

hf = figure(); hax = axes('parent',hf);
h = bar (hax, 2:4);
set (h, 'xdata', [3:5]')  # stored vert, but horiz no difference
set (hax, 'xlim', [2.5 5.5]);

as shown in the figure next to a matlab comparison, setting xdata fails to
update xlim to show the bars, and even with a manual xlim the new xaxis
ticks/lables have not been created. 

since changing xdata calls h= bar () again, not sure why the axis setting
isn't occurring along with it. 

will be writing up xtest BISTs to capture these along with tests for bug
#65671. then will give these a look after that one's finished.








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File Attachments:


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Name: bar+horizotal_yaxistickslabels.PNG  Size: 50KiB
<https://file.savannah.gnu.org/file/bar+horizotal_yaxistickslabels.PNG?file_id=56040>
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Name: bar+xdatachange.PNG  Size: 42KiB
<https://file.savannah.gnu.org/file/bar+xdatachange.PNG?file_id=56041>

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