how to plot the number of each run/plot in a scatterplot

tried to realize the problem by using annotations, but the programm overwrites and keeps the number of the loop-variable zas in the plot. This produces a "black numberball". Is it possible to delete the privious number?

figure(1)

v = VideoWriter('testvideo1.avi');
open(v);

for zas=1:Schritte
    
    plot([untere_Grenze untere_Grenze],[ Grenze untere_Grenze], 'black'); % Gerade 
    title('Stickstoffgenerator')
    hold on

    plot([Grenze untere_Grenze],[untere_Grenze untere_Grenze], 'black'); % Gerade 

    hold on

    plot([Grenze Grenze],[Grenze untere_Grenze], 'black');

    hold on

    plot([untere_Grenze Grenze],[Grenze Grenze], 'black');

    hold on

    plot([0 0],[untere_Grenze Grenze], 'magenta'); % Membran

    hold on
    txt={'N2 sind um den Faktor X und O2 sind um den Faktor Y vergrößert'};
    text(1.3,1.5, 'Stickstoff', 'HorizontalAlignment','left', 'Color', 'r')
    text(1.3,1.7, 'Sauerstoff', 'HorizontalAlignment','left', 'Color', 'b')
    a=annotation('textbox',[.6 .8 .7 .2],'String',txt,'EdgeColor','none');
    
    
    numbzas=annotation('textbox',[.1 .8 .7 .2],'String',zas,'EdgeColor','none');  % used annotation !!!
    
    a.FontSize=5.4;

    
    for zp=1:2:(2*Anzahl_mol)
    
    xlim([untere_Grenze+3/10*untere_Grenze Grenze+3/10*Grenze])

    ylim([untere_Grenze+3/10*untere_Grenze Grenze+3/10*Grenze])
   
    scatter(Vector_Lage(zp,zas),Vector_Lage(zp+1,zas),350*R,'filled','red')%,'markerfacecolor','red')
    hold on
    
    end
    for zp=(2*Anzahl_mol)+1:2:(2*Gesamt_Mol)
    
    xlim([untere_Grenze+3/10*untere_Grenze Grenze+3/10*Grenze])
    ylim([untere_Grenze+3/10*untere_Grenze Grenze+3/10*Grenze])
    scatter(Vector_Lage(zp,zas),Vector_Lage(zp+1,zas),200*R2,'filled', 'blue')%,'markerfacecolor','red')
    hold on
        
    end
    
pause(.005)
frame =getframe(gcf);
writeVideo(v,frame);
hold off

end

close(v);

[Image Analyst]

It's hard to visualize what's going on without the video. Please attach a short video in a zip file.

[Johannes Köbele]

The mentioned "black numberball" is in the top left corner. I hope you can open the file and thanks a lot!

Answer 1

[Alan Moses]

Hi,

Yes, it is possible to modify the number of each run. Initialize the annotation outside the loop and change the text inside the loop. Please try the following method:

txt = '';
numbzas=annotation('textbox',[.1 .8 .7 .2],'String',txt,'EdgeColor','none')

for zas=1:Schritte
    txt = sprintf('Run number: %d ',zas);
    set(numbzas,'String',txt)
end

Hope this helps!