movie of particle tracking in MATLAB

Question

Sanjana Singh 2020-6-2

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https://ww2.mathworks.cn/matlabcentral/answers/540263-movie-of-particle-tracking-in-matlab

回答： Image Analyst 2020-6-14

I am writing a basic code to trace a streamline in MATLAB. I need to make a movie of the particles tracing a streamline (streakline). I know about streamparticles function but that isn't what I am looking for, I wish to select a particular streamline and trace a particle on that and record that motion. Is there some other method to accomplish this?

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Answer 1

darova 2020-6-14

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https://ww2.mathworks.cn/matlabcentral/answers/540263-movie-of-particle-tracking-in-matlab#answer_450948

编辑：darova 2020-6-14

在 MATLAB Online 中打开

Here is the modified example from MATLAB help. Extract data from streamline and make animation

clc,clear
[x,y] = meshgrid(0:0.1:1,0:0.1:1);
u = x;
v = -y;
quiver(x,y,u,v)
startx = 0.1:0.1:1;
starty = ones(size(startx));
h1 = streamline(x,y,u,v,startx,starty);
xx = get(h1(2),'xdata');            % extract data for line2
yy = get(h1(2),'ydata');
h = line(xx(1),yy(1),'marker','o','markersize',15); % draw marker at start position
for i = 1:length(xx)
    set(h,'xdata',xx(i),'ydata',yy(i))              % change marker position
    pause(0.05)
end