[Octave-bug-tracker] [bug #55045] clabel in extreme positions

[Giovanni Ciriani]

URL:
  <https://savannah.gnu.org/bugs/?55045>

                 Summary: clabel in extreme positions
                 Project: GNU Octave
            Submitted by: gciriani
            Submitted on: Sat 17 Nov 2018 07:41:37 PM UTC
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Missed Error or Warning
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.4.1
        Operating System: Microsoft Windows

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Details:

contour(X, Y, Z, [.5 .6 .7 .8 .9])
works correctly, but a expanding it with ShowText doesn't:
contour(X,Y,Z,'ShowText', 'on',[.5 .6 .7 .8 .9])
warning: division by zero
warning: called from
    __clabel__ at line 82 column 15
    __contour__>update_text at line 564 column 11
    __contour__ at line 226 column 5
    contour at line 74 column 16

I know that the value 0.9 for the contour line is an extreme position,
because
contour(X,Y,Z,'ShowText', 'on',[.5 .6 .7 .8]) 
doesn't trigger any warning




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