How to get creation date of files

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Gen
Gen 2016-6-8
评论： Stephen23 2023-1-26
How can I get the creation date of file? I can get modified date with dir command but not the creation date.

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Stephen23
Stephen23 2016-6-8
编辑：Stephen23 2016-6-8
Try this FEX submission:
http://www.mathworks.com/matlabcentral/fileexchange/24671-filetime
Or on windows you can call the DOS command:
http://www.mathworks.com/matlabcentral/answers/100248-is-it-possible-to-obtain-the-creation-date-of-a-directory-or-file-in-matlab-7-5-r2007b
but their advice is not quite correct, it actually needs to be like this:
>> [~,str] = dos('dir /T:C *.m');
>> rgx = '(\d{4}\.\d{2}\.\d{2}\.\s+\d{2}:\d{2})\s+\d+\s+([^\n]+)';
>> tkn = regexp(str,rgx,'tokens');
>> tkn{:}
ans =
'2016.03.02. 11:51' 'startup.m'
ans =
'2016.06.07. 15:29' 'Untitled.m'
And then it reads the creation date perfectly!
  4 个评论
显示 2更早的评论
Gen
Gen 2019-2-4
Thank you very much.
I'll try these program.
KAE
KAE 2021-7-1
If you have spaces in the directory name you will need to put double quotes on the file name, here in a variable called fileName:
[~, str] = dos(['dir "' fileName '"']);

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更多回答（4 个）

Guillaume
Guillaume 2016-6-8
On windows you can simply delegate to .Net
d = system.IO.File.GetCreationTime(fullpath)
  1 个评论
Austin Spencer
Austin Spencer 2019-6-10
Thanks for the info, this is a nice clean solution! By comparison parsing the return from "dir" seems to be very fragile and is inherently platform dependent.
One correction: at least for my case, "system" must be capitalized.
d = System.IO.File.GetCreationTime(fullpath);
The resulting .NET DateTime object can then be converted into a MATLAB datetime object.
creationDateTime = datetime(d.Year, d.Month, d.Day, d.Hour, d.Minute, d.Second);

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Sam Raymond
Sam Raymond 2021-5-5
With python now very much integrated into MATLAB (R2021a), a nice way to get this is the following:
d1 = datetime(py.os.path.getctime('video_path'),'ConvertFrom','epochtime','TicksPerSecond',1,'Format','dd-MMM-yyyy HH:mm:ss.SSS');
Tim Lueth
Tim Lueth 2019-1-29
编辑：Tim Lueth 2019-1-29
On Mac OSX (tested 2019-01-29 using Mojave and Matlab R2018a) use:
[a,b]=system('GetFileInfo myfile.m'); s=strfind(b,'created: ')+9; crdat=b(s:s+18)
or
fname='myfile.m'
[a,b]=system(sprintf('GetFileInfo "%s"',fname)); s=strfind(b,'created: ')+9; crdat=b(s:s+18)
datestr(datenum(crdat))
Konstantin
Konstantin 2023-1-26
Why not like this?
file_info = dir(path_to_file)
  1 个评论
Stephen23
Stephen23 2023-1-26
"Why not like this?"
The question asks for the file creation date. DIR() returns the file modification date:
This is explained in the DIR() documentation:
https://www.mathworks.com/help/matlab/ref/dir.html#bsnswnx-1-listing

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