How can i specify which subplot that i want to plot on it?

Hi everyone! Now, i want to draw an animated arrow (general is any object) and an animated line, each of them is plotted on each subplot. I used draw-delete method to create an animated arrow and use "addpoints" command to create an animated line. Of course, we need a for loop, and so on. You can see below code. But, i couldn't do what i want with this code. The animated arrow always drew on second subplot. Who can help me? P/s: My problem is "How can i specify which subplot that i want to plot on it?" Thank you so much. And, my code:

clear
clc
subplot(2,1,1);
axis([-1 24 -1.1 1.1]);
line([0 23],[0 0],'Color','r');
jumpstep=0.1;
subplot(2,1,2);
axis([0 240 -1.1 1.1]);
sodiem=linspace(0,23,231);
cvi=sin(sodiem);
higharrow=0.8;
ani=animatedline('Color','y');
for k=0:length(sodiem)-1
    arr=arrow([jumpstep*k higharrow],[jumpstep*k 0],13,'EdgeColor','r','FaceColor','g');
    addpoints(ani,sodiem(k+1),cvi(k+1))
    drawnow
    pause(0.01)
    delete(arr);
end

Answer 1

[KL]

use axis handles,

ax1 = subplot(2,1,1);
something
ax2 = subplot(2,1,2);
something

now again go back to ax1

axes(ax1)
hold on
something more

[Le Dung]

Thank you so much. KL

[KL]

You're welcome!