[Octave-bug-tracker] [bug #57716] [octave forge] (control) pzmap matlab compatibility issues

[Nicholas Jankowski]

Follow-up Comment #2, bug #57716 (project octave):

best to keep everything here, lest nabble be unavailable

pzmap [control package 3.2.0] appears to have some issues with plot
formatting. confirmed non-compability with Matlab 2019a. 

Issuing the following commands produces an image with incorrect color and
legend (see pkmap.png and pkmap_matlab.png):


pzmap(tf([1 9],[1 2 2 4 5]))

hold on

pzmap(tf([1 8],[1 2 2 4 5]))



the following produces a plot with a red line replacing the plot instead of
pole-zero marks (see pzmap1.png and pzmap1_matlab.png:


pzmap(tf([1 8],[1 2 2 4 5]))
hold on
pzmap(tf([1 9],[1 2 2 4 5]),'r')


Last, the following should result in blue x and o, but it just makes them all
x's (see pkmap2.png and pkmap2_matlab.png):


pzmap(tf([1 9],[1 2 2 4 5]),'bx')


(file #48319, file #48320, file #48321, file #48322)
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Additional Item Attachment:

File name: pzmap.png                      Size:23 KB
    <https://savannah.gnu.org/file/pzmap.png?file_id=48319>

File name: pzmap_matlab.png               Size:15 KB
    <https://savannah.gnu.org/file/pzmap_matlab.png?file_id=48320>

File name: pzmap1.png                     Size:24 KB
    <https://savannah.gnu.org/file/pzmap1.png?file_id=48321>

File name: pzmap1_matlab.png              Size:15 KB
    <https://savannah.gnu.org/file/pzmap1_matlab.png?file_id=48322>



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