I need to speedup saving spectrogram images

I have 28 diseases every diseases has his own file in my computer to save the images on it..

I came with this code and its work but its it take time because my data are huge.

        if ANNOTD(c)==0
         
            
          spectrogram(M(LL:RR,1),'yaxis');
          filename = fullfile('C:\Users\SCC\Desktop\task1\heart DB\spectrigram\NOTQRS',sprintf('NOTQRS-patient(%02d)-beat(%04d)-channel(1).jpg',patient_num,c));
          exportgraphics(gca,filename);
          

if any one know pls help me

Answer 1

[Bjorn Gustavsson]

Maybe you get some speedup by using print instead of exportgraphics. You can at least try and check that:

...as above
print('-djpg',filename) % instead of exportgraphics

Maybe other file-formats are faster to write to, perhaps you can try to save as .png-images too.

HTH

[abdulrahman Hakami]

i got this error

Error in spectrigram (line 308)

print('-djpg',filename) ;

[Bjorn Gustavsson]

Oops. It should be:

print('-djpeg',filename)