File Exchange

image thumbnail

Recursive Directory Searching for Multiple File Specs

version 1.7.0.0 (5.72 KB) by Jonathan Sullivan
Searches a directory for multiple file specs with optional recursivity

2 Downloads

Updated 20 Feb 2013

View Version History

View License

Editor's Note: This file was selected as MATLAB Central Pick of the Week

dir2 List directory.
DIR2('directory_name') lists the files in a directory. Pathnames and
wildcards may be used. For example, DIR *.m lists all program files
in the current directory.

DIR2('directory_name','-r') Lists the files in a directory, and it's
subdirectories.

DIR2('directory_name',filter1,filter2,...) Applies the filters FILTER1
and FILTER2, etc to the directory search. These filters are treated as
an OR. Thus a file must only match atleast one filter to be included.
Filters may be strings, or cell arrays of strings.

DIR2('directory_name','-r',filter1,filter2,...) The recursive flag and
the filters may be in any order.

D = DIR2('directory_name') output the results in an M-by-1
structure with the fields:
name -- Filename
date -- Modification date
bytes -- Number of bytes allocated to the file
isdir -- 1 if name is a directory and 0 if not
datenum -- Modification date as a MATLAB serial date number.
This value is locale-dependent.

EXAMPLES:
Example 1: Recursive directory listing of the current directory
d = dir2(pwd,'-r')
{d.name}'

Example 2: Using multiple filters
d = dir2(pwd,'*.mat','*.m')
{d.name}'

Example 3: Using multiple filters w/ a recursive search
d1 = dir2(pwd,'*.mat','*.m','-r')
d2 = dir2(pwd,'-r','*.mat','*.m')
% Notice order of the flags doesn't matter
isequal(d1,d2)

NEW: Now implemented also as MEX file. Unfortunately only windows is supported for the MEX file, but the .m version is fully function regardless of OS. The MEX version seems to provide a ~20x speedup over the .m implementation. Syntax is identical, and will mex itself (assuming you have a compiler)

Cite As

Jonathan Sullivan (2021). Recursive Directory Searching for Multiple File Specs (https://www.mathworks.com/matlabcentral/fileexchange/40016-recursive-directory-searching-for-multiple-file-specs), MATLAB Central File Exchange. Retrieved .

Comments and Ratings (8)

Serge

This can return the same file more than once.

d=dir2(pwd,'*test*','*test2*')

anything containing "test" will be picked up by both filters and one file will appear twice in results. Unique may be a simple hack fix.

Matt

thanks

Matt

Michel bertrand

oups ..... sorry Jonathan, I made a mistake in my last comments; the path from the initial directory really shows up in the structure ouput by dir2; I do not know how I got to be convinced it was not the case.......Getting the fullpath would still be nice to have. Sorry again. Up-rating to 4.2 !!!

Michel bertrand

In the current version ( feb 21st, 2014) I would rate it as 3.7;
1) I think that a default install for dir2_mex for a pc is a little too much if one just wants to try dir2 to see how it works; installing dir2_mex could be handled with a param/val list; I personally commented the ispc block so I would not have to worry about mex-ing.
2) dir2 output the files name without giving their path and therefore is of limited use in a multilevel directory situation; it can be hard to get to the file if several levels are involved
3) I tried one way to get a recursive dir on Windows using system() call to DOS dir, i.e. system( 'dir /s /b'); this however does not work with filename that contains certain characters (as in my case accented characters); dir2 works fine for such case; furthermore the dir2.m is better since it is less machine-dependent and should work equally well on Unix-like platform

Stefan Slonevskiy

Jonathan, you might want to change the way you look for -r in the input arguments to be strncmp(temp,"-r",2)==0. The way you have it now will trigger on any path that has -r in any portion of its name.

Stefan Slonevskiy

Great tool. The speed is awesome! Thanks!! But it doesn't seem to be working with network paths (ie '\\computername\some\folder').

MATLAB Release Compatibility
Created with R2012b
Compatible with any release
Platform Compatibility
Windows macOS Linux

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!