[Octave-bug-tracker] [bug #60350] Incorrect plotting of solidline with qt and fltk

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?60350>

                 Summary: Incorrect plotting of solidline with qt and fltk
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Tue 06 Apr 2021 02:49:50 PM UTC
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Bernard
        Originator Email: bernard.gelly@live.com
             Open/Closed: Open
                 Release: 6.1.0
         Discussion Lock: Any
        Operating System: Any

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Details:

Line plots rendition in (default) solidline style depends on how big the
numbers are... Does not happen when linestyle is point-like. Does not happen
with gnuplot backend. Does happen with qt and fltk. Try this:

>> version
ans = 6.1.0
>> graphics_toolkit
ans = fltk
>> tn=now:1/864:now+1;   % make some date related (large) numbers
>> plot(tn,'.')          % ok (linear splope, as expected)
>> plot(tn)              % Not ok at all !!!  (broken  line)
>> plot(tn-tn(1))        % Ok again but with smaller number

Happens in:
Windows 6.1.0
Gnu/Linux 4.2.0




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