could you please tell me how to plot 2 objects with different velocity

Question

garry dcruz 2019-8-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/475171-could-you-please-tell-me-how-to-plot-2-objects-with-different-velocity

回答： KSSV 2019-8-7

clear all;
close all;
clc;
vA = [2.31; -0.55];     % initial velocity OF 1
dt = 0.1;                              % time step for animation.
t = 0:dt:10 ; 
% get points trajectory 
pA = zeros(2,length(t)+1) ;
pA(:,1) = [4 ;10] ;                       % initial position
for i = 2:length(t)+1                        % t is time variable
   % plot(pA(1),pA(2),'ro')            % Plot circle
    pA(:,i) = pA(:,i-1) + vA*dt; % update position
    %pB(:,i) = pB(:,i-1) + vB*dt; % update position
end
%plot
figure
title('Motion animation');
%xlabel('x (m)');
%ylabel('y (m)');
h = plot(pA(1,2),pA(1,1),'cs') ;
%h = plot(pB(1,1),pB(1,2),'gp') ;
axis([min(pA(2,:)) max(pA(2,:)) min(pA(1,:)) max(pA(1,:)) ])
for i = 1:length(pA)
    set(h,'XData',pA(1,i),'YData',pA(2,i))
    %set(h,'XData',pB(1,i),'YData',pB(2,i))
    pause(.5)
end

this is the code for a single object moving with constant velocity,anyone explain how to create two objects with same velocity?

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Answer 1

KSSV 2019-8-7

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/475171-could-you-please-tell-me-how-to-plot-2-objects-with-different-velocity#answer_386510

在 MATLAB Online 中打开

close all;
clc;
vA = [2.31; -0.55];     % initial velocity OF 1
vB = [2.31; -0.55];     % initial velocity OF 1
dt = 0.1;                              % time step for animation.
t = 0:dt:10 ;
% get points trajectory
pA = zeros(2,length(t)+1) ;
pA(:,1) = [4 ;10] ;                       % initial position
pB = zeros(2,length(t)+1) ;
pB(:,1) = [2 ;8] ;                       % initial position
for i = 2:length(t)+1                        % t is time variable
    % plot(pA(1),pA(2),'ro')            % Plot circle
    pA(:,i) = pA(:,i-1) + vA*dt; % update position
    pB(:,i) = pB(:,i-1) + vB*dt; % update position
end
%plot
figure
title('Motion animation');
%xlabel('x (m)');
%ylabel('y (m)');
x = [pA(1,2) ; pB(1,2)] ;
y = [pA(1,1) ; pB(1,1)] ;
h = plot(x,y,'s') ;
%h = plot(pB(1,1),pB(1,2),'gp') ;
axis([min(pA(2,:)) max(pA(2,:)) min(pA(1,:)) max(pA(1,:)) ])
for i = 1:length(pA)
    
    x = [pA(1,i) ; pB(1,i)] ;
    y = [pA(1,i) ; pB(1,i)] ;
    set(h,'XData',x,'YData',y)
    %set(h,'XData',pB(1,i),'YData',pB(2,i))
    pause(.5)
end