rename files from subfolders

I have a folder that contain 10 subfolders each subfolder contains 4 images named 1.bmp,2.bmp,3.bmp,4.bmp, I want to rename those images to 9.bmp,10.bmp,11.bmp,12.bmp like that how i can?

Answer 1

[Bhaskar R]

Get all files structure to one variable

cd <your directory>
d = dir('**/*.bmp')

Apply loop to get every file to structure

filename_full = fullfile(d(loop variable).folder, d(loop variable).name);
[~, filename, ext] = fileparts(filename_full);

check file names use ifelse condition

if strcmp(filename, '1');
    filename = '9'  % so to all other 3 files
end

concatanate all string to form renamed path

filename_full_ren = fullfile(d(loop variable).folder,[filename, ext]);

then rename file by moving

movefile(filename_full, filename_full_ren);

You are done

[Balaji M. Sontakke]

Error using movefile

Cannot copy or move a file or directory onto itself.

Error in renamefile (line 16)

movefile(filename_full, filename_full_ren);

cd db

d = dir('**/*.bmp');

for i = 1 : 10 % no of classes 100

for j = 1 : 4

filename_full = fullfile(d(j).folder, d(j).name);

[~, filename, ext] = fileparts(filename_full);

count=9;

if strcmp(filename,filename_full)

filename = count; % so to all other 3 files

end

filename_full_ren = fullfile(d(j).folder,[filename, ext]);

movefile(filename_full, filename_full_ren);

count=count+1;

end

end

[Bhaskar R]

cd db
d = dir('**/*.bmp');
for ii = 1:length(d)
    filename_full = fullfile(d(ii).folder, d(ii).name);
    [~, filename, ext] = fileparts(filename_full);
    if strcmp(filename,'1')
        filename = '9';
    elseif strcmp(filename,'2')
        filename = '10';
    elseif strcmp(filename,'3')
        filename = '11';
    elseif strcmp(filename,'4')
        filename = '12';
    end
    filename_full_ren = fullfile(d(ii).folder,[filename, ext]);
    movefile(filename_full, filename_full_ren);
end

[Balaji M. Sontakke]

it works but changes are in only first folder

cd testn;

d = dir('**/*.bmp');

for j=1:10

for ii = 1:4

filename_full = fullfile(d(ii).folder, d(ii).name);

[~, filename, ext] = fileparts(filename_full);

if strcmp(filename,'1')

filename = '9';

elseif strcmp(filename,'2')

filename = '10';

elseif strcmp(filename,'3')

filename = '11';

elseif strcmp(filename,'4')

filename = '12';

end

filename_full_ren = fullfile(d(ii).folder,[filename, ext]);

movefile(filename_full, filename_full_ren);

end

end

[Bhaskar R]

for ii = 1:4    % you have written for 4 files i think change for loop count as
end
for ii = 1:length(d)    % change to this

[Balaji M. Sontakke]

yes it works, thanks

cd testn;

d = dir('**/*.bmp');

for ii = 1:length(d) % change to this

filename_full = fullfile(d(ii).folder, d(ii).name);

[~, filename, ext] = fileparts(filename_full);

if strcmp(filename,'1')

filename = '9';

elseif strcmp(filename,'2')

filename = '10';

elseif strcmp(filename,'3')

filename = '11';

elseif strcmp(filename,'4')

filename = '12';

end

filename_full_ren = fullfile(d(ii).folder,[filename, ext]);

movefile(filename_full, filename_full_ren);

end