Do not delete obejcts and draw new ones, but keep the obejcts and modify the coordinates. If nothing is deleted, it is easy to keep lines in the diagram.
If you post your code, it would be easier to insert the required changes.
axesH = axes('XLim', [0, 100], 'YLim', [0, 100], ...
'NextPlot', 'add'); % As: hold on
pos = [10, 10];
dotH = plot(pos(1), pos(2), 'go', 'Markersize', 20);
for k = 1:100
pause(0.1);
newPos = randi([0, 100], 1, 2);
line([pos(1), newPos(1)], [pos(2), newPos(2)]);
set(dotH, 'XData', newPos(1), 'YData', newPos(2));
pos = newPos;
end
Every object is hold, but the dot is modified. This is even faster than recreaing the object for each frame.
