[Octave-bug-tracker] [bug #45851] Dot plot inaccurate

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?45851>

                 Summary: Dot plot inaccurate
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Mon 31 Aug 2015 08:11:05 PM UTC
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Inaccurate Result
                  Status: None
             Assigned to: None
         Originator Name: Pablo Creades
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.8.2
        Operating System: GNU/Linux

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Details:

I've noticed that when the X data is floating point with lots of decimals, the
line and dotted line plots generated using "fltk" are misaligned, and even
worst, the lines and dots moves randomly as you resize the plot window.
This behavior is not exhibited when using "gnuplot".
Here is a simple piece of code that would reproduce the error:

plot([7777777.0, 7777777.1], [1,2], ".-")

I found the problem when trying to plot time series in which the x axis
contain the date as the number of days since January 1st 0000, as returned by
the function "datenum".




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