How to obtain the date and time (datenum) of a .txt saved in the harddrive?
2 次查看(过去 30 天)
显示 更早的评论
I have multiple .txt files with mxn-arrays saved at different date and time.
I wonder if it is possible to write a command line that generates the date and time of the files?
Thank you for your attention
Emerson
0 个评论
采纳的回答
Azzi Abdelmalek
2012-9-19
编辑:Azzi Abdelmalek
2012-9-19
D=struct2cell(dir('*.txt'))
file=D(2,:)'
% your files are
fle{1},file{2},
% if your files are in folder "fold" use
dir('fold/*.txt')
4 个评论
Azzi Abdelmalek
2012-9-19
ok then sort our array
d=datevec(file)
f=datestr(sortrows(d,[1:6]))
Jan
2012-9-19
@Azzi: The order of fields replied by DIR is not documented. Although I assume, that TMW will not change the order, using the field names is safer:
D = dir('*.txt');
Dates = {D.date};
Sorting the numerical date numbers is safer, because it does not fail when the day, month or year changes:
index = sort([D.datenum]);
更多回答(1 个)
Jan
2012-9-19
编辑:Jan
2012-9-19
Which date and time do you mean? The creation date, the date of the last modification or the last access? The dir command replies the last modification date. To get the creation date, you can use FEX: FileTime under Windows:
D = dir(fullfile(Folder, '*.txt')); % Absolute files names are safer
Files = {D.name};
Dates = cell(1, length(Files));
for iFile = 1:length(Files)
Dates{iFile} = GetFileTime(fullfile(Folder, Files{iFile}), ...
'Local', 'Creation');
end
If the modification date is ok, this is simpler:
D = dir(fullfile(Folder, '*.txt')); % Absolute files names are safer
Files = {D.name};
Dates = {D.date};
Then the Files are sorted alphabetically. If you want a chronological sorting:
[dummy, index] = sort([D.datenum]);
Files = Files(index);
Dates = Dates(index);
3 个评论
Azzi Abdelmalek
2012-9-19
编辑:Azzi Abdelmalek
2012-9-19
Simon, I downloades your submission GetFileTime.m, but it's empty (just comments)
Jan
2012-9-19
@Emerson: You forgot the quotes around the folder name. It will be more flexible to use a variable called "Folder" instead of hardcoding the folder in the code.
@Azzi: Then please read the comments. There you find instruction about the compilation of the included C-files. Unfortunately pre-compiled MEX-files are not allowe in the FileExchange, but you find a link to my homepage, where you can download pre-compiled files.
另请参阅
产品
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!