[Octave-bug-tracker] [bug #38152] 3d plot of sphere appears squashed with "axis square equal"

[John W. Eaton]

URL:
  <http://savannah.gnu.org/bugs/?38152>

                 Summary: 3d plot of sphere appears squashed with "axis square
equal"
                 Project: GNU Octave
            Submitted by: jwe
            Submitted on: Wed 23 Jan 2013 06:40:08 PM GMT
                Category: Plotting with gnuplot
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  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:

I expect the following code to plot a sphere.  With the fltk+opengl graphics
toolkit, it appears spherical, but with gnuplot, it appears squashed in the Z
dimension.  I'm using gnuplot 4.6 patchlevel 0.


delta = pi/40;
theta = 0:delta:pi;
phi = 0:2*delta:2*pi;
[phi, theta] = meshgrid (phi, theta);

r = 5 .* sin (theta);
x = r .* cos (phi);
y = r .* sin (phi);
z = 5 .* cos (theta);

surf (x, y, z)
axis square equal





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