How to read all mat files in folder and save plot as image

Hello everyone, i hope you are doing well. i have the following 100 .mat files in folders.

i want to save the plot of all .mat files as image.

I have implement the following code for single mat file

S = load('C:\Users\DELL\Documents\MATLAB\Examples\R2021b\deeplearning_shared\ModulationClassificationWithDeepLearningExample\Dataset1\frame8PSK001.mat');
plot(real(S.frame))
set(gca,'visible','off')

[Stephen23]

What is your question?

[Med Future]

@Stephen23 i want to read all mat files from folder then plot real of the mat file and saves the plot as images as i done for one file in above code

Answer 1

[Mathieu NOE]

hello

you can try / build your solution based on this example

here I wanted all data being in one single plot so I concatenated all the files data in one output array. You can of course avoid this step and plot individually each file and save it

fileDir = pwd; % this directory

fileNames = dir(fullfile(fileDir,'frame*.mat')); % get list of data files in directory
fileNames_sorted = natsortfiles({fileNames.name}); % sort file names into natural order 
                    % (download FEX : https://fr.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort)

M= length (fileNames_sorted);

time1 = [];
signal1 = [];
     
for f = 1:M 
    
    S = load(fullfile(fileDir, fileNames_sorted{f}))
    %  contatenation of all individual files data
    time1 = [time1; S.ScopeData1.time];
    signal1 = [signal1; S.ScopeData1.signals.values];
        
end

figure
plot(time1,signal1,'*-')
% save plot
print('MySavedPlot','-dpng')

Answer 2

[Image Analyst]

To save the plot you can use exportgraphics:

fileName = fullfile(folder, 'frame8PSK001.png');
exportgraphics(gca, fileName);