rename files inside the folder

I have to rename files that is placed inside the folder, for e.g. in the below shown example 080 needs to be replaced as 020.. Any help ??

1_ss_ddd_080_y000.txt

1_ss_ddd_080_y001.txt

1_ss_ddd_080_y002.txt

Answer 1

[Voss]

old_file_names = { ...
    '1_ss_ddd_080_y000.txt', ...
    '1_ss_ddd_080_y001.txt', ...
    '1_ss_ddd_080_y002.txt'};

new_file_names = strrep(old_file_names,'080','020');

for ii = 1:numel(old_file_names)
    movefile(old_file_names{ii},new_file_names{ii});
end

[Turbulence Analysis]

Thanks, actually there are 100 files not just 3 files.. Is there any way to rename all the files in the directory ??

1_ss_ddd_080_y000.txt

1_ss_ddd_080_y001.txt

1_ss_ddd_080_y002.txt

.

.

.

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1_ss_ddd_080_y100.txt

[Voss]

The loop works the same whether there are 3 or 100 or 100000 files.

However, one thing to consider is whether MATLAB's working directory is the directory where the files are. Because if not, you ned to refer to the files by their full paths. This renames all the .txt files in the directory your_directory:

your_directory = 'C:\path\to\some\folder';

s = dir(fullfile(your_directory,'*.txt'));

old_file_names = fullfile(your_directory,{s.name});
new_file_names = fullfile(your_directory,strrep({s.name},'080','020'));

for ii = 1:numel(old_file_names)
    movefile(old_file_names{ii},new_file_names{ii});
end

[Turbulence Analysis]

End up with below error

Error using movefile
Cannot copy or move a file or directory onto itself.

[Voss]

I guess one of the files didn't have '080' in the name (possibly because it was already renamed by a previous run of this code).

To handle that situation, I skip the file in that case:

your_directory = 'C:\path\to\some\folder';

s = dir(fullfile(your_directory,'*.txt'));

old_file_names = fullfile(your_directory,{s.name});
new_file_names = fullfile(your_directory,strrep({s.name},'080','020'));

for ii = 1:numel(old_file_names)
    if strcmp(old_file_names{ii},new_file_names{ii})
        continue
    end
    movefile(old_file_names{ii},new_file_names{ii});
end

[Turbulence Analysis]

It's perfect now... Thanks a lot..