How to overlap 2 graph on a single figure, one of them is a dynamic, changing in each step?

Question

Akash Vyas 2022-3-13

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评论： Akash Vyas 2022-3-13

I've plotted the C-space representation of a RR-manipulator, and there are two obstical (Red, green) in C-space, Now I wanted to move the current configuration (black dot) in the C-space but I don't know how to animate the movement of black dot in this still image.

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KSSV 2022-3-13

Do you have the (x,y) coordinates for the red and green arrows shown? Where you want to move the block dot? To red or green?

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Answer 1

Simon Chan 2022-3-13

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https://ww2.mathworks.cn/matlabcentral/answers/1670384-how-to-overlap-2-graph-on-a-single-figure-one-of-them-is-a-dynamic-changing-in-each-step#answer_916284

在 MATLAB Online 中打开

Update the black dot position in the for loop as follows:

f = figure;
ax = gca;
x1 = xline(ax,6);                       % Simulate the red obstacle
hold(ax,'on');
x2 = xline(ax,20);                      % Simulate the green obstacle
xlim(ax,[1 25]);
ylim(ax,[0 100]);
Npoint = 100;                           % Movement of black dot (say 100 positions)
RRx = randi([7 19],1,Npoint);           % Dummy data for x-coordinates of black dot
RRy = randi([1 99],1,Npoint);           % Dummy data for y-coorindtaes of black dot
h = plot(ax,RRx(1),RRy(1),'b*','MarkerSize',10);       % Plot the first black dot
pause(0.2);
for k = 2:Npoint
    h.XData = RRx(k);                   % Update the x-coordinates of black dot
    h.YData = RRy(k);                   % Update the y-coordinates of black dot
    pause(0.2);                         % Pause 0.2sec for each update, to avoid refresh too fast
end