[Octave-bug-tracker] [bug #57129] Implement stem plot value "auto" for property "MarkerEdgeColor"

[Rik]

Update of bug #57129 (project octave):

                Severity:              3 - Normal => 2 - Minor              
                Priority:              5 - Normal => 3 - Low                
                 Summary: Add new stem plot properties such as ColorMode
present in latest Matlab versions => Implement stem plot value "auto" for
property "MarkerEdgeColor"

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Follow-up Comment #6:

The issue is the property "MarkerEdgeColor".  In Matlab, this accepts string
color values (e.g., 'k' or 'r'), RGB color values (e.g., [1, 0, 0]), and the
special string value "auto".

In the case of "auto", Matlab uses the value of the "Color" property for the
value of "MarkerEdgeColor".  The issue is that Octave only implements an
actual color specification.  Re-titling the bug to reflect that.

In the meantime, there is a simple workaround of using a LineSpecification
argument to stem.  This is Matlab-compatible so when coded this way will work
in either language.

Instead of 


stem (1:100, 'color', 'k')


try


stem (1:100, 'k')




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