[Octave-bug-tracker] [bug #55481] Plotting differences from Matlab

[Rik]

URL:
  <https://savannah.gnu.org/bugs/?55481>

                 Summary: Plotting differences from Matlab
                 Project: GNU Octave
            Submitted by: rik5
            Submitted on: Tue 15 Jan 2019 12:38:38 PM PST
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

Visual comparisons of plots from the various graphics toolkits (fltk, gnuplot,
qt) as well as Matlab are available at:

https://drive.google.com/file/d/16txXTl2k6-nrHQzWSFhHj2J35Wju91BK/view?usp=sharing



Basic things that I have noticed

demo bar 1 : axes ticks are shown on top of the bars
demo text 1 : rotated text is only valid for 0, 90, 180, 270 degrees.  This is
not the case for the FLTK toolkit which also uses gl2ps
demo polar 1 : The axes lines are semi-transparent in Matlab, as they are for
Octave on a rectangular axes
demo copyobj 1 : Completely fails on Matlab, so we must have the wrong syntax
demo errorbar 2 : Completely different plot.
demo ezplot 3 : Complaint from Matlab about undefined variable 'T'
demo annotation 3 : There are more arrowhead styles available for Matlab.
demo box 3 : The 3-D ticklengths are overly large.  This is a problem with all
3-D plots.
demo ezplot3 1 : Completely different plot
demo ezplot 1 : Matlab replaces special text, like pi, with '\pi' so that tex
interpreter can produce symbols.
demo fplot 1 : Matlab doesn't automatically add a legend, but I actually like
having one.
demo isonormal 1 : Upper left plot is different from Matlab.
demo stem 1 : Matlab draws axes box for stem plots.  Could turn that on very
easily.
demo light 5 : It looks like the reflections in the right column are in the
opposite direction from Matlab (multiplication by -1 maybe?)
demo light 9 : Matlab's "lit" and "unlit" look the same.
demo line 1 : No Matlab plot so we have incorrect syntax somehow.
demo polar 2 : Matlab plot is completely different.
demo polar 4 : polar axes grid lines are under, rather than over, polar plot.
demo scatter 3 : Matlab fails because the color argument C is somehow
incorrect.





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