Capture plot titles using getframe and writerobj

I am recording the plots to make a movie. I am able to get the axis info on each frame but not able to get the title. Since with every interetion the title changes I want to capture that too. How can I do that?

Answer 1

[Turlough Hughes]

You can use the figure handle (instead of the axis handle) with the getframe function and that captures the entire interior of the figure window, including the axes title. Here's an example:

filename = 'testVideo.avi';
fontSize = 14;

% Initialisation
hf = figure();              % hf - figure handle
[X,Y,Z] = peaks(100);
hp = surf(X,Y,Z);           % hp - plot handle

% Ensure axis limits are fixed
ax = gca;
axis([-4 4 -4 4 -10 10])
ax.ZLimMode = 'manual';

v = VideoWriter(filename);  % v - video writer object
open(v)

% Example of a video scaling the peaks function
C = [0:0.1:20 19.9:-0.1:0]./20;
for ii = 1:numel(C)
    
    % update the figure title
    title(sprintf('Z = %.2fZ_P',C(ii)),'fontSize',fontSize) 
    % update the plot
    hp.ZData = C(ii)*Z;
    
    f = getframe(hf); % getframe using the fig. handle, hf.
    writeVideo(v,f)   % write video
end

close(v)