You need to iterate through your dataset and ensure the necessary subfolder exist, then move the file
% concat sub folder path
subfolderPath = [parentDirPath '\' flowerName];
% check if subfolder exists
if ~exist(subfolderPath, 'dir')
% create subfolder
mkdir(subfolderPath);
end
% move file from original path to subfolder
[status, msg] = movefile([parentDirPath '\' fileName], [subfolderPath '\' fileName]);
% check if file moved successfully
if ~status
% log error
end
That's the general idea
