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Decompressing *.7Z Files with MATLAB

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Matlab2010 el 28 de Oct. de 2014
Comentada: Walter Roberson el 13 de Jun. de 2022
I have a 7z file. I wish to decompress it using Matlab. How can I do this? The inbuilt matlab functions dont support it.
I have tried,
[status,result] = system(['"C:\Program Files\WinRAR\UnRAR.exe" e ' E:\myFile.7z ' >null']);
however this fails as it gives
result =
UNRAR 5.11 freeware Copyright (c) 1993-2014 Alexander Roshal
E:\myFile.7z is not RAR archive
No files to extract
On closer inspection unrar.exe is not the same as winrar (which can do 7z). Hence i download 7-zip
[status,result] = system(['"C:\Program Files\7-Zip\7z.exe" e ' E:\myFile.7z]);
result =
7-Zip [64] 9.20 Copyright (c) 1999-2010 Igor Pavlov 2010-11-18
Processing archive: E:\myFile.7z
Error: Can not open file as archive
any ideas?

Respuesta aceptada

Matlab2010 el 29 de Oct. de 2014
Editada: Matlab2010 el 22 de Nov. de 2014
[status,result] = system(['"C:\Program Files\7za920\7za.exe" -y x ' '"' filename{f} '"' ' -o' '"' outputDir '"']);
Also, just in case anyone finds it useful, compressing a file with winrar is done by:
[status,result] = system(['"C:\Program Files\WinRAR\Rar.exe" a ' 'C:\Users\user\Desktop\8736_test.rar ' ' C:\Users\user\Desktop\8736.mat' ' >null']);
  2 comentarios
sunil kumar
sunil kumar el 7 de Mayo de 2019
How to extract .bz2 files in matlab
Could somebody help?
Walter Roberson
Walter Roberson el 7 de Mayo de 2019
system() out to the appropriate bzip2 or bunzip program with the appropriate options
It appears that some versions of gzip can handle .tar.bz2 files when given appropriate options.

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Más respuestas (1)

Jake August
Jake August el 19 de Abr. de 2016
This was very helpful. Someone else looking might find this useful.
% for 7zip 15.14 x64
file7z = 'D:\my.7z';
% rest of code
[dir7z,~,~] = fileparts( file7z );
dir7z = ['"' dir7z '"'];
file7z = ['"' file7z '"'];
[status,cmdout] = system( ['"C:\Program Files\7-Zip\7z.exe" x -o',dir7z,' ',file7z] );
  3 comentarios
Verena Schwachmeyer
Verena Schwachmeyer el 13 de Jun. de 2022
Hi Jake August,
thank you. Your solution works for me - but only if I run it once. When this operation is part of an iteration, Matlab freezes during the second loop. Do you have an idea why that is and how to fix it?
Walter Roberson
Walter Roberson el 13 de Jun. de 2022
Perhaps using .NET Systems.Diagnostic.Process() to start the process instead of system()

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