Creating a gif from a matrix of double.

My problem is that I have a set of matrices , each matrix contain only 1 and -1.

What I'm trying to do is to make a gif of this matrices in succesion, so that the gif frames are the rapresenation of the the matrices with colors, black for -1 and white for 1 (somthing like imagesc) . But from my code somenthind do not work.

In my code x is a cell array which contains my matrices .

Answer 1

[Ameer Hamza]

See this example to create a gif using black and white imagesec() plots.

% 100 matrices of size 4x4 stored in cell array filled with random data
M = squeeze(mat2cell((rand(20,20,100) > 0.5)*2-1, 20, 20, ones(1,100)));

outFilename = 'myGifFile.gif';
fig = figure();
ax = axes();
colormap([0 0 0; 1 1 1]);

for i=1:100
    imagesc(ax, M{i});
    img = getframe(ax);
    img = rgb2gray(img.cdata);
    if i==1
        imwrite(img, outFilename, 'gif', 'LoopCount', inf, 'DelayTime', 0.05)
    else
        imwrite(img, outFilename, 'gif', 'WriteMode', 'append', 'DelayTime', 0.05);
    end
end

Answer 2

[Image Analyst]

See Steve's blog on how to make animated gifs: https://blogs.mathworks.com/steve/2019/02/07/animated-png-apng-files/?s_tid=srchtitle

If you want a non-animated one, just use imwrite().

[andrea]

Not really of any help. I just wanna an animated gif of a sequence matrices which entries are -1 and 1 , I don't know if helps but i'm trying to make an animated gif of an Ising Model simulation.