MATLAB: How to automatically let Matlab input the file in sequence

Question

How can I let Matlab automatically input the file itself rather than one by one myself?

I mean, I want to put `Sample 1.wav` and then output `Sample 1.png` and then

put `Sample 2.wav` and then output `Sample 2.png` and then put `Sample 3.wav` and then output `Sample 3.png`

I do not want to type myself 1, 2, 3 and rather let the matlab run itself from `1 to 1,000`

    [y,Fs] = audioread('sample1.wav');
    spectrogram(y,'yaxis')
    saveas(gcf,'sample1.png')

Then

   [y,Fs] = audioread('sample2.wav');
    spectrogram(y,'yaxis')
    saveas(gcf,'sample2.png')

Then

    [y,Fs] = audioread('sample3.wav');
    spectrogram(y,'yaxis')
    saveas(gcf,'sample3.png')

Answer 1

Can you try the following:

>> for i=1:1000
     fn_read  ="sample"+i+".wav"; % this is the file name to read from
     fn_read  = char(fn_read);    % convert the string to a char array

     fn_write ="sample"+i+".png"; % this is the file name to write to
     fn_write = char(fn_write);   % convert the string to a char array
     [y,Fs] = audioread(fn_read);
     spectrogram(y,'yaxis')
     saveas(gcf,fn_write)
end

let me know if it works.