how not to delete one figure using clf?

I want to plot animation with a background image.

but for animation, i used clf in for loop.

so the backgorund image is deleted because of clf.

here is my code.

    open('example.fig')
 for i = 1:length(TX)
     clf
    plot3(TX(1,i),TX(2,i),TX(3,i),'o','markerfacecolor','r','markersize',10,'markeredgecolor','k');
    hold on

    VVS = VV{i};
    VV_lon = VVS(1,:);
    VV_lat = VVS(2,:);
    VV_alt = VVS(3,:);
    plot3(VV_lon,VV_lat,VV_alt,'b--')
        
        drawnow; pause(0.1)
 end     

thanks.

[Voss]

Does removing clf produce the desired result? If not, how not?

Answer 1

[Jan]

clf clears the contents of the current figure. If you do not want this, remove clf.

Maybe all you want is to clear the current axes. Then use gca instead. This causes some flickering. Animating objects is smoother, if they are not created repeatedly, but the values are adjusted.

axesH = axes('NextPlot', 'add');  % as: hold on
H1    = plot3(TX(1,1), TX(2,1), TX(3,1), 'o', ...
              'markerfacecolor','r','markersize',10,'markeredgecolor','k');
for i = 1:length(TX)
   pause(0.1);  % No additional drawnow required
   set(H1, 'XData', TX(1,1), 'YData', TX(2,1), 'ZData', TX(3,1));
end