Deleting data in Plotting

Hey theret I have a problem when I run this plotting code. I want all elements to be plotted in animation and only the last data point, but I only get one of them like that, the others are plotted in animation but the old data dont delete... Here is the code I'm using:

for i = 1:N
    for j = 1:B
        p=plot(x(j,i),y(j,i),'bo');
        hold on
    end   
    pause(0.001)
    delete(p)

end

Thank you

Answer 1

[Oscar García]

Hey I figured it out:

     for i = 1:N
          for j = 1:B
              p(j)=plot(x(j,i),y(j,i),'bo');
              hold on
          end   
          pause(0.001)
          delete(p)

    end

Thanks

Answer 2

[Geoff Hayes]

Oscar - at which point do you want to delete the data? Once the inner for loop has completed or on every iteration of the inner for loop?

If you just want to show the current point only (with no history) then try updating the graphics handle p rather than deleting it. Something like

 hPlot = plot(NaN,NaN);

 for i = 1:N
    for j = 1:B
        set(hPlot,'XData',x(j,i),'YData',y(j,i), ...
                  'Marker','o','MarkerEdgeColor','b');
        pause(0.0001);
    end   
 end

[Oscar García]

Thanks Geoff...I want to delete the data once the inner for loop has completed. The final plot must be B number of elements moving until i=N...

[Oscar García]

I've tried your suggestion but matlab returns an error...:

Error using set
Invalid parameter/value pair arguments

[Geoff Hayes]

Oscar - I should have tested before posting. Try this instead

 set(hPlot,'XData',x(j,i),'YData',y(j,i),'Marker','o','MarkerEdgeColor','b');

[Oscar García]

Now I only get plotted the Bth element

[Geoff Hayes]

Oscar - please be more specific in what you want.