Save video from comet command

I use a comet command in my code to plot a graph (e.g. comet(x,y)). I want to save this in a video format to show it in a Powerpoint prresentation. How can I do it?

Answer 1

[KSSV]

Instead of video, it is better to go for .gif file. See the example code below:

clc; clear all ;
x = 0:0.01:1;
figure(1)
filename = 'mygif.gif';
t = linspace(0,2*pi) ;
x = sin(pi*t) ;
for n = 1:length(t)
      plot(t(1:n),x(1:n))
      axis([min(t) max(t) min(x) max(x)]) ;
      drawnow
      frame = getframe(1);
      im = frame2im(frame);
      [imind,cm] = rgb2ind(im,256);
      if n == 1;
          imwrite(imind,cm,filename,'gif', 'Loopcount',inf);
      else
          imwrite(imind,cm,filename,'gif','WriteMode','append');
      end
end

[Kostas Sita]

Perfect idea! It worked! However, it runs really slow. Any idea on how I could change the speed (e.g. frames per sec)?

[KSSV]

Yes it is slow...it can be made fast......try this:

http://in.mathworks.com/matlabcentral/fileexchange/21944-animated-gif/content/Animated_GIF/html/AnimatedGif.html

[Kostas Sita]

Perfect! Thanks a lot!!!