Changing file name in matlab

I have multiple text files. They are data_23_45.23, data_34.56_56.56, data_23_45

I want to change names and they are data_23.00_45.23, data_34.56_56.56, data_23.00_45.00

How can I change file name.

Answer 1

[Walter Roberson]

You can rename() individual files.

I do not see any pattern in your renaming so I cannot offer code to carry out the task in general.

Answer 2

[Guillaume]

If I understood correctly:

%get list of files
folder = 'c:\somewhere\on\a\filesystem\';
files = dir(fullfile(folder, '*.txt'));
filenames = {files.name}
%find files with incomplete names
filepattern = regexp(filenames, '(data_\d+)(\.\d+)?(_\d+)(\.\d+)?(.*)', 'tokens', 'once');
isdatafile = cellfun(@numel, filepattern) == 5;
filenames(~isdatafile) = [];  %eliminate files that don't conform to the basic pattern
filepattern(~isdatafile) = [];
filepattern = vertcat(filepattern{:}); %concatenate file patterns into an nx5 cell array
hasmissingpattern = cellfun(@isempty, filepattern); %find missing entries
filepattern(hasmissingpattern) = {'.00'};
%only rename files whose name has changed
filenames = filenames(any(hasmissingpattern, 2));
filepattern = num2cell(filepattern(any(hasmissingpattern, 2), :), 2);
%rename files
cellfun(@(old, new) movefile(fullfile(folder, old), fullfile(folder, strjoin(new, ''))), filenames', filepattern);