How can I make an animating plot moving with the speed I predefined?

Question

Jiwoo 2023-7-19

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https://ww2.mathworks.cn/matlabcentral/answers/1998138-how-can-i-make-an-animating-plot-moving-with-the-speed-i-predefined

评论： Jiwoo 2023-7-21

Hello, I am trying to make a simple simulation of a robot following straight lines. I am using a plot function and I would like to know how to make the robot in the plot move with the speed I want (ex. 2 m/s or 5 m/s)

Thank you!

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Dyuman Joshi 2023-7-19

One way would be to update the coordinates of the robot according to the velocity after each iteraion.

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Answer 1

Benjamin Kraus 2023-7-19

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This is a very basic/crude example, but it shows some basic concepts:

y0 = 0; % Starting location
v0 = 100; % Starting velocity
a = -10; % Acceleration
p = plot(0, y0, 'o');
xlim([0 25])
ylim([0 600])
drawnow
t0 = datetime(); % Get the starting time.
tnow = t0;
while (tnow - t0 < minutes(1) && p.YData >= 0)
    t = seconds(tnow-t0); % How much time has passed?
    p.XData = t;
    p.YData = y0 + v0*t + 0.5*a*t.^2;
    drawnow
    tnow = datetime(); % Get the current time
end

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Benjamin Kraus 2023-7-19

Once you get that working, you may want to look into either timer or backgroundPool so you can run the simulation without blocking the MATLAB command window (for example Background Processing).

Jiwoo 2023-7-21