Continual points on a movie

2 次查看（过去 30 天）

Jake Elliott 2020-4-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/519477-continual-points-on-a-movie

回答： Bjorn Gustavsson 2020-4-21

I have a movie made of a plot with images behind each frame and points that mark certain locations via plots. I want to have the points from previous frames showing on the current frame as if showing a "path" per se. I have made the movie using the imshow, hold on, plot(), and get frame functions in a for loop. What would be the best way to accomplish this? Thank you.

4 个评论
显示 2更早的评论隐藏 2更早的评论

Jake Elliott 2020-4-21

Here is my for loop. I would like all past points to be added to the current frame with the new data

darova 2020-4-21

If you want to write a movie use VideoWriter

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Bjorn Gustavsson 2020-4-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/519477-continual-points-on-a-movie#answer_427311

在 MATLAB Online 中打开

If you want to plot all the points (x,y) from the first to point i you can do something like this:

q = 1;
for i1 = 1:numimgs % Avoid using i and j as indices, they are also used for (-1)^(1/2)
    imshow(I{i1})
    hold on
    plot(x(1:i1),y(1:i1),'b.')
    fishplot(i1) = plot(x(i1,:),y(i1,:),'r.')
    hold off
    P(q) = getframe;
    q = q+1;
end