list 列出文件夹中的子文件夹 - Matlab（仅子文件夹，而不是文件）
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原文地址: http://stackoverflow.com/questions/8748976/
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list the subfolders in a folder - Matlab (only subfolders, not files)
提问by Maddy
I need to list the subfolders inside a folder using Matlab. If I use
我需要使用 Matlab 列出文件夹内的子文件夹。如果我使用
nameFolds = dir(pathFolder),
I get .and ..+ the subfolder names. I then have to run nameFolds(1) = []twice. Is there a better way to get the subFolder names using Matlab? Thanks.
我得到.和..+ 子文件夹名称。然后我必须跑nameFolds(1) = []两次。有没有更好的方法来使用 Matlab 获取子文件夹名称？谢谢。
回答by yuk
Use isdirfield of diroutput to separate subdirectories and files:
使用输出isdir字段dir来分隔子目录和文件：
d = dir(pathFolder);
isub = [d(:).isdir]; %# returns logical vector
nameFolds = {d(isub).name}';
You can then remove .and ..
然后您可以删除.和..
nameFolds(ismember(nameFolds,{'.','..'})) = [];
You shouldn't do nameFolds(1:2) = [], since diroutput from root directory does not contain those dot-folders. At least on Windows.
您不应该这样做nameFolds(1:2) = []，因为dir根目录的输出不包含那些点文件夹。至少在 Windows 上。
回答by theLtran
This is much slicker and all one line:
这是更光滑的一行：
dirs = regexp(genpath(parentdir),['[^;]*'],'match');
Explained:
genpath()is a command which spits out all subfolders of the parentdirin a single line of text, separated by semicolons. The regular expression function regexp()searches for patterns in that string and returns the option: 'matches' to the pattern. In this case the pattern is any character not a semicolon = `[^;], repeated one or more times in a row = *. So this will search the string and group all the characters that are not semicolons into separate outputs - in this case all the subfolder directories.
解释：
genpath()是一个命令，它parentdir在一行文本中吐出 的所有子文件夹，用分号分隔。正则表达式函数regexp()在该字符串中搜索模式并返回选项：“匹配”到模式。在这种情况下，模式是任何不是分号的字符 = `[^;]，连续重复一次或多次 = *。因此，这将搜索字符串并将所有不是分号的字符分组到单独的输出中 - 在这种情况下是所有子文件夹目录。
回答by Yas
The following code snippet just returns the name of sub-folders.
以下代码片段仅返回子文件夹的名称。
% `rootDir` is given
dirs = dir(rootDir);
% remove `.` and `..`
dirs(1:2) = [];
% select just directories not files
dirs = dirs([obj.dirs.isdir]);
% select name of directories
dirs = {dirs.name};
回答by Matthijs Noordzij
And to effectively reuse the first solution provided in different scenario's I made a function out of it:
为了有效地重用不同场景中提供的第一个解决方案，我做了一个函数：
function [ dirList ] = get_directory_names( dir_name )
%get_directory_names; this function outputs a cell with directory names (as
%strings), given a certain dir name (string)
%from: http://stackoverflow.com/questions/8748976/list-the-subfolders-
%in-a-folder-matlab-only-subfolders-not-files
dd = dir(dir_name);
isub = [dd(:).isdir]; %# returns logical vector
dirList = {dd(isub).name}';
dirList(ismember(dirList,{'.','..'})) = [];
end
