How can I run this script and only create folders with files in it without having an additional file outside the folder?

clc

clear

close all

% start timer

start = tic;

% input n and m

n = input('\n How many folders would you like me to make?:');

m = input('\n How many files per folder would you like me to make?:');

% create for loop to make folders and files

for i=1:n

foldername=strcat('dir',num2str(i)); % name folder

mkdir(foldername); % creates folder

for j=1:m

filename = strcat('file',num2str(j),'.txt'); % name file

filename1 = fullfile(foldername,filename); % build a full file

file = fopen(filename1,'w'); % open file in write mode

writematrix(magic(j),filename,'delimiter','|'); % write matrix in txt format with | as delimiter

fclose(file); % close file

end

end

% stop timer

stop = toc(start);

% display the recorded time

fprintf('\n Execution time : %f seconds \n',stop);

Answer 1

[Stephen23]

Get rid of the FOPEN and FCLOSE, they are completely unrelated to WRITEMATRIX:

start = tic;
% input n and m
n = input('\n How many folders would you like me to make?:');
m = input('\n How many files per folder would you like me to make?:');
% create for loop to make folders and files
for ii = 1:n
    foldername = strcat('dir',num2str(ii)); % name folder
    mkdir(foldername); % creates folder
    for jj = 1:m
        filename = strcat('file',num2str(jj),'.txt'); 
        fullname = fullfile(foldername,filename);
        writematrix(magic(jj), fullname, 'delimiter','|');
    end
end
% stop timer
stop = toc(start);
% display the recorded time
fprintf('\n Execution time : %f seconds \n',stop);