I made a folder with 12 .fig files, I am attempting to convert these to jpeg using a loop.

I have tried multiple loops and commands but I am new to matlab and have still not been able to figure it out.

figs = openfig('Figures');
for K = 1 : length(figs)
         filename = sprintf('figure_%02d.jpg', K);
   saveas(figs(K), filename);
end

This is what I have.

Error using load

Unable to read file 'Figures'. Input cannot be a directory.

Error in matlab.graphics.internal.figfile.FigFile/read (line 31)

hgDataVars = load(filename, '-mat', '-regexp', '^hg[M]');

Error in matlab.graphics.internal.figfile.FigFile

Error in loadFigure (line 31)

FF = matlab.graphics.internal.figfile.FigFile(fullpath);

Error in openfig>localOpenFigure (line 75)

h = loadFigure(filename, visibleAction);

Error in openfig (line 40)

figOut = localOpenFigure(filename, reuse, visibleAction);

Error in P2B (line 1)

figs = openfig('Figures');

These are the errors I am getting and the pictures are the figures the the folder.

Answer 1

[DGM]

Maybe something more like this.

D = dir('Figures/*.fig'); % use dir() to get directory contents
for K = 1:numel(D)
    hf = openfig(fullfile(D.folder,D.name)); % get the full name
    filename = sprintf('figure_%02d.png', K); % don't use JPG for anything
    saveas(hf, filename); % save the opened figure
    close(hf) % close the opened figure instead of creating a pile of them
end

... assuming there are less than 100 .fig files.

[Jackson]

I still got errors although it made another .fig file, P2B.m was other random code I tried I just need the "P2B(1-12).fig" to be converted. Here are the errors:

Error using load

Unable to open file

"C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\C:\Users\Jacks\OneDrive\Documents\MATLAB\Figures\P2B1.fig\P2B10.fig\P2B11.fig\P2B12.fig\P2B2.fig\P2B3.fig\P2B4.fig\P2B5.fig\P2B6.fig\P2B7.fig\P2B8.fig\P2B9.fig"

for output.

Error in matlab.graphics.internal.figfile.FigFile/read (line 31)

hgDataVars = load(filename, '-mat', '-regexp', '^hg[M]');

Error in matlab.graphics.internal.figfile.FigFile

Error in loadFigure (line 31)

FF = matlab.graphics.internal.figfile.FigFile(fullpath);

Error in openfig>localOpenFigure (line 75)

h = loadFigure(filename, visibleAction);

Error in openfig (line 40)

figOut = localOpenFigure(filename, reuse, visibleAction);

Error in untitled5 (line 3)

hf = openfig(fullfile(D.folder,D.name)); % get the full name

[Voss]

D = dir(fullfile('Figures','*.fig')); % use dir() to get directory contents
for K = 1:numel(D)
    hf = openfig(fullfile(D(K).folder,D(K).name)); % get the full name
    filename = sprintf('figure_%02d.png', K); % don't use JPG for anything
    saveas(hf, filename); % save the opened figure
    close(hf) % close the opened figure instead of creating a pile of them
end

[Jackson]

Thank you, that worked perfectly

[Voss]

You're welcome!

[DGM]

oof I can't believe I forgot that. That's what I get for testing with only one file.

Answer 2

[Mitchell Thurston]

You can do it by running this code while inside the Figures directory

files = ls; % get filenames of everything in that directory
K = 0;
for i = 1:length(files(:,1))
    [~,~,ext] = fileparts(files(i,:));
    if strcmp(strip(ext),'.mat')
        K = K+1;
        fig = openfig(files(i,:));
        filename = sprintf('figure_%02d.jpg', K);
        saveas(fig, filename);
    end
end

Also, if the figures are generated by P2B.m, you should be able to get all the figures outputted by publishing that script.