[Octave-bug-tracker] [bug #50497] plotyy() legend in reverse order

[Ray Zimmerman]

URL:
  <http://savannah.gnu.org/bugs/?50497>

                 Summary: plotyy() legend in reverse order
                 Project: GNU Octave
            Submitted by: rdzman
            Submitted on: Wed 08 Mar 2017 07:29:29 PM UTC
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Ray Zimmerman
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.0
        Operating System: Any

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Details:

When using plotyy(), the legend assigns the wrong labels to the data series,
in particular, they are in the reverse order, with the first label being
assigned to the last data series, etc.

The following plots illustrate the problem ...

figure
plot([1;2], [1 2 3 4; 2 3 4 5]);
legend('One', 'Two', 'Three', 'Four')

figure
plotyy([1;2], [1 2 3 4; 2 3 4 5], [1;2], [-1; -5]);
legend('One', 'Two', 'Three', 'Four')


In Matlab, the second plot will look like the first (except for the additional
line on the secondary axis) and the legend will also be identical. In Octave,
the legend labels all 4 lines incorrectly (reverse order), and incidentally,
also uses a different color (red) from that used by Matlab (green).



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File Attachments:


-------------------------------------------------------
Date: Wed 08 Mar 2017 07:29:29 PM UTC  Name: Octave-plot.pdf  Size: 3kB   By:
rdzman
Plots created with Octave 4.2.0, Matlab R2016a on Windows 7.
<http://savannah.gnu.org/bugs/download.php?file_id=39946>
-------------------------------------------------------
Date: Wed 08 Mar 2017 07:29:29 PM UTC  Name: Matlab-plot.pdf  Size: 2kB   By:
rdzman
Plots created with Octave 4.2.0, Matlab R2016a on Windows 7.
<http://savannah.gnu.org/bugs/download.php?file_id=39947>
-------------------------------------------------------
Date: Wed 08 Mar 2017 07:29:29 PM UTC  Name: Octave-plotyy.pdf  Size: 3kB  
By: rdzman
Plots created with Octave 4.2.0, Matlab R2016a on Windows 7.
<http://savannah.gnu.org/bugs/download.php?file_id=39948>
-------------------------------------------------------
Date: Wed 08 Mar 2017 07:29:29 PM UTC  Name: Matlab-plotyy.pdf  Size: 2kB  
By: rdzman
Plots created with Octave 4.2.0, Matlab R2016a on Windows 7.
<http://savannah.gnu.org/bugs/download.php?file_id=39949>

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