animate 2d plot

Hi, All!

Say i have 2 variable, x1 and x2. I wanna plot (x1, x2) and animate it over time. i've tried this code:

x = [1 2;2 1;3 1;1 2;2 1;3 2];
x1 = x(1:end,1);
x2 = x(1:end,2);
r=animatedline;

for t=1:1000
    for i=1:6
        x1(i,t+1)=x1(i,t)+3;
        x2(i,t+1)=x2(i,t)+x1(i,t);
    end
    
addpoints(r,x1(1,:),x2(1,:))
addpoints(r,x1(2,:),x2(2,:))
drawnow
end

But that's not what i meant. From code above, the first line move from (1,2) to (4,3) to (7,7).... the second line move from (2,1) to (5,3), to (8,8),...

till the figure show the movement of those 6 lines.

[KSSV]

Read about Comet

[Nur Amalina]

Thanks @Kssv. i've tried comet but it doesn't work for multiple trajectory.

comet(x1(1,:),x2(1,:),x1(2,:),x2(2,:))

error: Too many input arguments.

[jonas]

I dont understand what you want to do. Do you want to animate six or two lines?

[Nur Amalina]

6 lines @jonas. i was trying to make 2 lines first but it didn't work

Answer 1

[Cris LaPierre]

Here's one way to do it following the instructions on the Line Animations documentation page. I reduced the number of points to 100.

x = [1 2 3 1 2 3];
y = [2 1 1 2 1 2];

l1 = animatedline;
l2 = animatedline;
l3 = animatedline;
l4 = animatedline;
l5 = animatedline;
l6 = animatedline;
axis([0 150 0 1500])
for t = 1:100
    if t>1
        x(t,:)=x(t-1,:)+3;
        y(t,:)=y(t-1,:)+x(t,:);
    end
        
    addpoints(l1,x(t,1),y(t,1))
    addpoints(l2,x(t,2),y(t,2))
    addpoints(l3,x(t,3),y(t,3))
    addpoints(l4,x(t,4),y(t,4))
    addpoints(l5,x(t,5),y(t,5))
    addpoints(l6,x(t,6),y(t,6))
    
    drawnow limitrate
end