A moving point plot in MATLAB figure with animation.

My program calculates position of a point on Z plane as (X,Y). I need to plot (X,Y) in Z-plane with a moving point showing location of point over the time in a single MATLAB figure. Please help.

Answer 1

[Iman Ansari]

n = 50;
XY = 10 * rand(2,n) - 5;
for i=1:n
    plot(XY(1,i),XY(2,i),'or','MarkerSize',5,'MarkerFaceColor','r')
    axis([-5 5 -5 5])
    pause(.1)
end

[Usama Faisal]

i=1;

for n=1:length(y) % use for loop to animate the line

if y(n)>sur(n)

plot(x(n),y(n),'o','MarkerFaceColor','b')

i=i+1;

grid on

drawnow

else

end

end

[Bodie]

what does sur stand for?

Answer 2

[Image Analyst]

Use the comet() function. It does exactly that.

[Aakash]

Thanks Image Analyst!! It was helpful.

[Wei-jiunn Jang]

Beautiful solution!

[reema shrestha]

I exactly want to do the same thing in projectile motion simulation. Instead of using comet to trace the path as well,I want to create a ball and make it follow the trajectory without drawing the trajectory,just the ball moving. Can you suggest me any?

[Image Analyst]

You can perhaps just use plot() with a big dot marker over and over:

for k = 1 : whatever
    x = ......
    y = ......
    plot(x, y, 'r.', 'MarkerSize', 30);
end

Answer 3

[Mohamadreza Khashei]

for k = 1 : whatever x = ...... y = ...... plot(x, y, 'r.', 'MarkerSize', 30); end

Answer 4

[Muhammad Hadyan Utoro]

x = [0:0.01:2*pi];

for i = 1:length(x)

y = sin(x);

figure(1)

plot(x,y,'-o','MarkerIndices',1+i)

hold off

pause(0.005)

end