[bug #68089] (image) imhist.m is broken since Octave 11.1.0 (due to colorbar.m)

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URL:
  <https://savannah.gnu.org/bugs/?68089>

                 Summary: (image) imhist.m is broken since Octave 11.1.0 (due
to colorbar.m)
                   Group: GNU Octave
               Submitter: hardy
               Submitted: Mi 25 Feb 2026 12:49:17 UTC
                Category: Octave Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Regression
                  Status: None
             Assigned to: None
         Originator Name:
        Originator Email:
             Open/Closed: Open
         Discussion Lock: Unlocked
                 Release: 11.1.0
        Operating System: Any
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Mi 25 Feb 2026 12:49:17 UTC    By: Hartmut <hardy>
In the new Octave version 11.1.0 the imhist.m command of the image package
does not work any more. You can check with this easy code:


pkg load image
clear, close all
I = checkerboard;
imhist(I);


The resulting error message is:


error: colorbar: LOC specification must occur as first argument
error: called from
    colorbar at line 122 column 11
    imhist at line 165 column 5
    problemcode at line 4 column 1


I assume this is due to a change of the colorbar command in core Octave since
Octave version 11.1.0. The problem of the image package's imhist command seems
to be in line 165 of imhist.m:


    colorbar ("xticklabel", [], "SouthOutside");


This call to core Octave's colorbar.m does not seem to be "legal" any more
since Octave 11.1.0. (This used to work fine with many, many older Octave core
versions.)

I assume this should be fixed in the image package. Or is this a bug in core
Octave's colorbar function?









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