Matlab plot recording to a video

Question

MaD 2019-9-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/479736-matlab-plot-recording-to-a-video

回答： darova 2019-9-10

hi,

I woulkd like to create a video where a plot is created based on the .txt file read. The plot should have the 'main screen' and a 'zoomed screen' in the conner and the variable should be recorded simultaneously in both plots.

Im sharing my current example.

Is it possible to specify the target plot for the variable? or any other suggestion?

%% Create figure frame
fid = figure;
hold on
grid on
xlim([-0.1 1.12]) %setting hard limits for x-axis
ylim([0.8 1.2]) %setting hard limits for y-axis
h=axes('Parent', fid, 'position',[0.5 0.2 0.3 0.3]);
%% Set up and writing the movie.
writerObj = VideoWriter('out_movie_540_.avi'); % movie name.
writerObj.FrameRate = 540/4; % Frames per second. Larger number correlates to smaller movie time duration. 
open(writerObj);
for i=1:size(tnow)      
%     pause(0.1); % The command designed to slow down the live recording of the matlab graph. 
    figure(fid); % Makes sure you use your desired frame.
    plot(tnow(i),p_pf1(i),'r.');
    
    if mod(i,4)==0 % Uncomment to take 1 out of every 4 frames.
        frame = getframe(gcf); % 'gcf' can handle if you zoom in to take a movie.
        writeVideo(writerObj, frame);
    end
 
end
hold off
close(writerObj);% Saves the movie.

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Answer 1

darova 2019-9-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/479736-matlab-plot-recording-to-a-video#answer_391276

Example

clc,clear
x = linspace(0,10);
y = sin(x) + 0.1*cos(10*x);
fid = figure;
h1 = gca;
plot(x,y);
hold on 
h2 = axes('Parent',fid,'Position',[0.6 0.2 0.2 0.2]);
plot(x,y)
hold on
for i = 1:length(x)
    h(1) = plot(h1,x(i),y(i),'or');
    h(2) = plot(h2,x(i),y(i),'or');
    xlim(h2, [-1 1]+x(i))
    ylim(h2, [-1 1]+y(i))
    pause(0.2)
    delete(h)
end
hold off