Rename a lot of files

Question

Cheuk Yin Wong 2022-8-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1779330-rename-a-lot-of-files

评论： Cheuk Yin Wong 2022-8-15

I have a lot of files with names 'Sample_1.csv, Sample_2.csv, Sample_3.csv, ..., Sample_101'. I would like to rename all of them to the format of Sample_xxx.csv, so it becomes like this: 'Sample_001.csv, Sample_002.csv, Sample_003.csv, ..., Sample_101'.

Can anyone help me? Thank you very much.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2022-8-15

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1779330-rename-a-lot-of-files#answer_1026510

在 MATLAB Online 中打开

@Akira Agata's solution is perfectly usable. But here is a different approach that never converts to numeric and back

dinfo = dif('*.csv');
filenames = {dinfo.name};
new_filenames = regexprep(filenames, {'_(\d)\.', '_(\d\d)\.'}, {'_00$1.', '_0$1.'});
mask = ~strcmp(filenames, new_filenames);
cellfun(@(OLD, NEW) movefile(OLD,NEW), filenames(mask), new_filenames(mask));

The mask part is to avoid trying to movefile() a file to the same name. A file might have the same name after regexprep() if it did not follow the pattern at all, or if it already had 3 or more digits after the '_'

3 个评论
显示 1更早的评论隐藏 1更早的评论

Walter Roberson 2022-8-15

~ is logical negation. The strcmp() is looking for file names that are the same after text replacement; you do not want to process those (besides being inefficient, the movefile() woud complain about moving a file to itself.)

Cheuk Yin Wong 2022-8-15

Thank you! It works very well.

请先登录，再进行评论。

Answer 2

Akira Agata 2022-8-15

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1779330-rename-a-lot-of-files#answer_1026490

在 MATLAB Online 中打开

How about the following?

fileList = dir('*.csv');
for kk = 1:numel(fileList)
  fileNum = extractBetween(fileList(kk).name,'_','.csv');
  fileNum = str2double(fileNum);
  newFileName = sprintf("Sample_%03d.csv", fileNum);
  movefile(fileList(kk).name, newFileName);
end