Draw the trail of a moving marker on an animated 2D plot

Question

Jake 2020-8-5

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/575335-draw-the-trail-of-a-moving-marker-on-an-animated-2d-plot

评论： Jake 2020-8-5

Hi everyone!

So, I'm creating a 2D plot where the marker moves from one point to another (nothing fancy, just pausing the plot). Code in question is something similar to this.

A = rand(1800,1); 
B = rand(1800,1); % I'm just using dummy values here but my actual program has similar outputs (1800 x 1 double)
for i=1:1800
    plot (A(i),B(i), 'd', 'MarkerSize', 5, 'MarkerFaceColor', 'k')
    axis ([-10 10 -10 10])
    pause (0.1)
end

What I'm trying to achieve now is, however, the trail of the marker. When the marker goes from point 1 to 2 (for instance) I want it to leave a trail. So at the end of the day, there will be a plotted graph. How can I approach this?

Also, I'd appreciate any pointers or easier methods for this than using a for loop, if there is one :)

Thanks in advance!

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Answer 1

KSSV 2020-8-5

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/575335-draw-the-trail-of-a-moving-marker-on-an-animated-2d-plot#answer_475294

编辑：KSSV 2020-8-5

在 MATLAB Online 中打开

A = rand(1800,1); 
B = rand(1800,1); % I'm just using dummy values here but my actual program has similar outputs (1800 x 1 double)
for i=1:1800
    plot (A(i),B(i), 'd', 'MarkerSize', 5, 'MarkerFaceColor', 'k')
    hold on
    plot(A(1:i),B(1:i),'r')
    hold off
    axis ([-10 10 -10 10])
    pause (0.1)
end