[Octave-bug-tracker] [bug #39370] contourc adds duplicates to the start and end of the 1st level

[Nicholas Jankowski]

Follow-up Comment #6, bug #39370 (project octave):

as of Octave v.6.1.0, the examples from comment #0:

The help contourc help example now reads:


x = 0:2;
y = x;
z = x' * y;
c = contourc (x, y, z, 2:3)
 => c =
       2.0000   1.0000   1.0000   2.0000   2.0000   3.0000   1.5000   2.0000
       4.0000   2.0000   2.0000   1.0000   1.0000   2.0000   2.0000   1.5000


which matches wat Octave 6.1.0 produces:


>> x = 0:2;
>> y = x;
>> z = x' * y;
>> a = contourc (x, y, z, 2:3)
a =

   2.0000   1.0000   1.0000   2.0000   2.0000   3.0000   1.5000   2.0000
   4.0000   2.0000   2.0000   1.0000   1.0000   2.0000   2.0000   1.5000


Matlab 2020b produces:

>> x = 0:2;
>> y = x;
>> z = x' * y;
>> contourc (x, y, z, 2:3)
ans =
    2.0000    1.0000    2.0000    3.0000    1.5000    2.0000
    2.0000    2.0000    1.0000    2.0000    2.0000    1.5000


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