sorting files into 2 separate folders

Hi I am trying to sort some DICOM files (1584), by separating them and saving them into 2 separate folders. the way i need to separate them is every alternating 8 files goes to one of the 2 folders. so i think i need start counting 1-8 and put in 1 folder and the next 8 go to the other folder. I'm not sure how to proceed this is what i have till now

      % sorting alternating data 

    path = 'C:\Users\......';
    output_dir = uigetdir('','C:\Users\Sorted_GE_SE_Images');

    dirs = dir('C:\Users\GE_SE_Images\....\10_ep2d_ge_se_128_DCE\*.dcm') 
    N = length(dirs);

    for i = 1 : N;
        for j = 1:8; 
            file_SE = dirs(j).name
            copyfile(file_SE,'C:\Users\\Sorted_GE_SE_Images\SE_images')
            for k = 9:16;
                file_GE = dirs(k).name
                copyfile(file_GE,'C:\Users\Sorted_GE_SE_Images\SE_images')
            end
        end
    end

Answer 1

[per isakson]

Maybe this will help you

sorting alternating data

    path = 'C:\Users\......';
    output_dir = uigetdir('','C:\Users\Sorted_GE_SE_Images');

    dirs = dir('C:\Users\GE_SE_Images\....\10_ep2d_ge_se_128_DCE\*.dcm');
    N = length(dirs);

    for ii = 1 : 16 : N
        sad = dirs(ii:min([N,ii+16]));
        for jj = 1:length(sad)
            file_SE = dirs(jj).name;
            if jj<=8
                copyfile( file_SE, 'C:\Users\Sorted_GE_SE_Images\SE_images')
            else
                copyfile( file_SE, 'C:\Users\Sorted_GE_SE_Images\GE_images')
            end
        end
    end

[Hoda]

Thanks alot Per, if you dont mind could you explain what this command

   sad = dirs(ii:min([N,ii+16]));

does. Also tried to run your code but I get an error : Error using copyfile No matching files were found.

[per isakson]

The outer loop takes steps of 16 items of the file list except for the last where it takes the rest.

    for ii = 1 : 16 : N
        sad = dirs(ii:min([N,ii+16]));

sixteen items of the file list are copied to sad. The inner loop loops over the length of sad. Copying to sad makes the indexing simpler.

&nbsp

"Error using copyfile No matching files were found" &nbsp Replace

    file_SE

by

    fullfile( 'folder_name', file_SE )