Plot multiple points in a for loop

Question

Felix Kalscheuer 2017-5-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/341546-plot-multiple-points-in-a-for-loop

编辑： Kasun Kariyawasam 2018-11-29

Hello everyone, I have a for loop which is plotting different points over a certain amount of time. Right now the previous point is removed when the next one is added, but i would like to keep the old points.

n=100
for i=1:n+1
    plot(i,i,'r.','MarkerSize',10);
    axis([0 110 0 110])
    f(i) = getframe(gcf);
end

Hopefully someone can help me with that.

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Answer 1

KL 2017-5-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/341546-plot-multiple-points-in-a-for-loop#answer_268082

在 MATLAB Online 中打开

use hold

n=100

for i=1:n+1
    plot(i,i,'r.','MarkerSize',10);
    hold on
    axis([0 110 0 110])
    f(i) = getframe(gcf);
end
hold off

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Answer 2

Steven Lord 2017-5-23

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https://ww2.mathworks.cn/matlabcentral/answers/341546-plot-multiple-points-in-a-for-loop#answer_268088

Create an animatedline then addpoints to that animatedline each time you step through your for loop.

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Kasun Kariyawasam 2018-11-29

编辑：Kasun Kariyawasam 2018-11-29

Thanks @steven. This was a good solution. Using 'animatedline' rather than 'plot' later allowed me to add different colors and legend entries for each line, which would have been difficult with 'plot'.

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