A question about list folder contents with dir

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xiaobo wu
xiaobo wu 2024-1-26
移动：Voss 2024-1-31
Hi,
I used uigetdir and dir to list all subfolders with the following code:
path_dir=uigetdir('C:\Documents','Select a folder');
list_folder=dir(path_dir);
allFolder_list={list_folder.name};
But the names in the list have two dot files, which don't exist actually in the folder. What are they and how to remove them?

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Dyuman Joshi
Dyuman Joshi 2024-1-26
编辑：Dyuman Joshi 2024-1-26
This notation is used in filesystems (and anywhere they are implemented/used) -
. refers to the current directory/folder.
.. refers to the parent directory/folder. This can also be used to access the parent directory/folder.
(search for dot dot on this webpage - https://in.mathworks.com/help/matlab/matlab_prog/matlab-operators-and-special-characters.html)
For example, if your directory is C:\Users\Bob, . refers to C:\Users\Bob and .. refers to C:\Users.
To remove them -
d=dir;
d=d(~ismember({d.name},{'.','..'}));
  2 个评论
Image Analyst
Image Analyst 2024-1-26
Years ago I made the suggestion to them to have additional inputs to dir to list files only and folders only. You can too -- just give it a star rating at the bottom of the help entry for dir. I just did it again. I can't believe it's taking them so long to implement this simple option but it depends on how many people are asking for it.
Walter Roberson
Walter Roberson 2024-1-26
Note that
d = dir;
d = d(~[d.isfolder]);
would remove . and .. and all folders, leaving only regular files.

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