如何让 MATLAB 代码为弹跳球制作动画

Question

    close all;
    clear all;
    clc;
% height and period of time per data change
timeStep = 0.0005;
height = zeros(4e4,1);
% acceleration
g = 9.81;
% COR and initial height
COR = 0.8;
height(1)=15;
% initial speed
v = 0;


for i=2:length(height)
    v = v - g*timeStep;
    %new height
    height(i)=max(0,height(i-1)+v*timeStep);
    % stop ball from going below ground      
    if height(i)<=0
        % change velocity direction
        v = -COR*v;                      
    end

end  
% plot height on y and time on x axis
time = (1:4e4)*timeStep;
plot(time,height);
% turn into animation
%z = plot(time,height,'o','markerfacecolor','r','markersize',11);
i = 0;
while 1
    %set(z,'XData',time,'YData',height);
    %drawnow
    time2 = time(i);
    height2 = height(i);
    plot(time2,height2,'o','markerfacecolor','r','markersize',11);
    axis([0 15 0 15]);
    i = i + 1;
    pause(0.1);
end   
grid on; 
box on;

Answer 1

我发现了一个小错误。您的索引 i 应该从 1 而不是 0 开始。除此之外，您所需要的只是用 drawnow 更新图表。可以找到文档 here.

由于您在评论中提供了此方法，我建议您看一下 pause(0.1) 因为这意味着您的动画需要超过 16 分钟才能完成。由于时间步长较小，您的图表可能在您没有注意到的情况下进行了更新。

使用您注释掉的代码是一种可能的解决方案。

% turn into animation
z= plot(time(1),height(1),'o','markerfacecolor','r','markersize',11);
axis([0 15 0 15]);
grid on;
box on;
for i = 2:length(height)
    set(z,'XData',time(i),'YData',height(i));
    drawnow limitrate
end

如何让 MATLAB 代码为弹跳球制作动画

How do I make the MATLAB code animate a bouncing ball

matlab

animation