How to create animation of multiple of frames using for loop ?

I have the following code that plots text file data. However, here I chose few text files to represent and plot. I would like to plot all the data files and combine them as an animation something like a for loop that loops over all my data.

My current code:

% Frame to plot

frame =[18 17 18]; % this is the number of frames (text files) inside each folder (different values of w)
% I have a total of 22 text files in each folder that I wanna loop over and
% make an animation


xStart = [257 257 285]; %257; %[257 257 285]; %230;
xEnd = 340*[1 1 1]; %340; %340*[1 1 1];  %380;
% Get the range in x of the values we want to consider
% Load X and Y data
XX = load([upperDir subDir{1} 'X.txt']);
YY = load([upperDir  subDir{1} 'Y.txt']);

% Make the Fourier mesh
n = size(XX);
dx = XX(2,1) - XX(1,1);
dy = YY(1,2) - YY(1,1);
L(1) = max(max(XX)) + dx;
L(2) = max(max(YY)) + dy;

% Make a vector for x direction
xVec = XX(:,1);
yVec = YY(1,:)';

% Make a vector for ky
kyVec = makeK(L(2), n(2))*1000;
kyVec = kyVec(1:n(2)/2);

maxkx = 0;
minkx = 1e11;

fontSize = 16;
w = [305 175 125];
kx = linspace(minkx, maxkx, 1000);
ky = linspace(kyVec(2), kyVec(end), 1000);

    
for i = 3:-1:1 % this for loop represnts the three different folders that I am taking the text files from to plot
    
    % Make a vector for kx
    kxVec = makeK( xVec(xEnd(i)) - xVec(xStart(i)) + dx, 2^(nextpow2(xEnd(i) - xStart(i) +1)))*1000;
    kxVec = kxVec(1:length(kxVec)/2);
    
    maxkx = max([ maxkx kxVec(end)]);
    minkx = min([ minkx kxVec(2)]);

    % Load density data
    ne_bg = load([upperDir subDir{i} 'ne_unpert.txt']);

    ne =  load([upperDir  subDir{i} 'ne' num2str(frame(i)) '.txt']);
    ne_p = ne - ne_bg ; 
   
    phi_bg = load([upperDir 'phi_unpert.txt']);
    phi =  load([upperDir subDir{i} 'phi' num2str(frame(i)) '.txt']);
    phi_p = phi - phi_bg ; 
     
    dn_over_n = ne_p ./ ne;
    
%     % Take fft in x direction and integrate in y direction to get spectrum
    dn_spectrum_x = FFTmat(dn_over_n(xStart(i):xEnd(i), :), yVec, 2, 1)';
    phi_spectrum_x = FFTmat(phi_p(xStart(i):xEnd(i), :), yVec, 2, 1)';
   
%     % Take fft in y direction and integrate in x direction to get spectrum
    dn_spectrum_y = FFTmat(dn_over_n(xStart(i):xEnd(i), :), xVec(xStart(i):xEnd(i)), 1, 1)';
    phi_spectrum_y = FFTmat(phi_p(xStart(i):xEnd(i), :), xVec(xStart(i):xEnd(i)), 1, 1)';
    
    subplot(1,2,1);
    loglog(kyVec(2:end), dn_spectrum_y(2:end),'-','LineWidth',1,'DisplayName',['w = ' num2str(w(i)) ' km']);
    gird on; 
  
    subplot(1,2,2);
    loglog(kyVec(2:end), phi_spectrum_y(2:end),'-','LineWidth',1,'DisplayName',['w = ' num2str(w(i)) ' km']);
    grid on;
  
end

Answer 1

[the cyclist]

I believe you can do what you want by using the getframe and movie functions.

[Jamie Al]

Thanks! I've never used these functions before, do you mind giving an example? Can I use this inside a loop?

[the cyclist]

There are examples in the documenation pages I cited.

You can also find other examples online if you search for keywords like "example matlab movie".