[Octave-bug-tracker] [bug #55713] meshc throws an error with Octave 5.00.91

[Stephan Gebauer]

URL:
  <https://savannah.gnu.org/bugs/?55713>

                 Summary: meshc throws an error with Octave 5.00.91
                 Project: GNU Octave
            Submitted by: stephan_ii
            Submitted on: Thu 14 Feb 2019 08:44:33 PM UTC
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 5.0.91
        Operating System: Microsoft Windows

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Details:

Hi,

i have testet a peace of code works well with Octave 4.4.1, but
gives an error message with Octave 5.00.91.

Here the Code:



N = 25;                     % frame count for the movie
[X,Y]=meshgrid(-pi:.1:pi);  % generate grid
for t=1:N
    f=cos(X-t*pi/N).*sin(Y-t*pi/N);   %  test function
    meshc(X,Y,f);                     % Plot
    xlim([-pi,pi]);
    ylim([-pi,pi]);
    xlabel('x');
    ylabel('y');
    zlabel('f');
    title('Evolution der Funktion f(x,y,t)=cos(x-(t\pi)/N)sin(y-(t\pi)/N)');
    colorbar;
    pause(0.05);
    M(:,t) = getframe(gcf);  % Save the current Frame in M
end



from the second pass of the for loop the meshc(X,Y,f) cause this error message
with 
each pass:

debug>
error: get: invalid handle (= -64.2043)
execution error in graphics callback function
error: get: invalid handle (= -31.1792)
execution error in graphics callback function
.
.
.


nevertheless the code works, means M stores the frames as it should do.
Just the error is thrown in the command line.

Otave runs under Windows 10.

Hope its helpful!

Best regards

 Stephan








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