[Octave-bug-tracker] [bug #62883] plot() function handles property/value pairs differently from Matlab

[Rik]

Update of bug #62883 (project octave):

              Item Group:                    None => Matlab Compatibility   
                  Status:                    None => Confirmed              
                 Release:                   7.1.0 => dev                    
                 Summary: 'parent' property not working as expected => plot()
function handles property/value pairs differently from Matlab

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Follow-up Comment #1:

This is not a problem with the "parent" property, but rather a general
difference between how Octave and Matlab handle property/value pairs.  In
Octave, prop/val pairs apply to the nearest XY data and you can have different
prop/val pairs for different sets of XY data.  In Matlab, you can specify a
LineSpec per XY data set, but ALL XY data share the prop/val pairs.

Example


x = linspace(-2*pi,2*pi);
y1 = sin(x);
y2 = cos(x);
plot (x,y1,x,y2, 'color', 'm')


The result is that the first line uses the default color from the ColorOrder
property while the second line has the default overridden to magenta.

File:octave.png

In Octave, you can apply properties individually so this works


plot (x,y1, 'color', 'r', x,y2, 'color', 'm')


File:octave2.png

If you try this syntax with Matlab it will generate an error because it only
allows one set of property/value pairs and it must occur after all XY data has
been specified.





(file #53557, file #53558)

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Additional Item Attachment:

File name: octave.png                     Size:31 KB
    <https://file.savannah.gnu.org/file/octave.png?file_id=53557>

File name: octave2.png                    Size:27 KB
    <https://file.savannah.gnu.org/file/octave2.png?file_id=53558>



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