matlab：列出所有唯一的子文件夹

Question

我想要一份所有完整子文件夹的列表。该列表不应包含任何父文件夹。

我使用

获取目录列表

dirs = regexp(genpath(basePath),['[^;]*'],'match');

但是，这些功能真的很慢。可能是因为我的文件夹包含数千个文件。

父文件夹的removefall是这样完成的：是否有可能在代码大小和速度方面进行优化？

function [ ListOfDirs ] = findsubfolders( basePath )

dirs = regexp(genpath(basePath),['[^;]*'],'match');

index = 0;
for k = 1:numel(dirs)
    currFolder = dirs{k};
    if numel(strrep(currFolder, basePath,'')) ~= 0
        if isempty(strfind(currFolder, 'remove'))
            index = index + 1;
            selectedDirs{index} = currFolder;
        end
    end
end

dirs = selectedDirs;
idx = 0;
for k = 1:numel(dirs)
    currFolder = dirs{k};
    isNotParentFolder = false;
    for s = 1:numel(dirs)
        if s ~= k
            compFolder = dirs{s};
            if numel(strrep(strrep(currFolder, compFolder,''),currFolder,'')) ~= 0
                isNotParentFolder  = true;
            end
        end
        if isNotParentFolder
            idx = idx + 1;
            ListOfDirs{idx} = currFolder;
            break;
        end
    end
end

end

Answer 1

我建议您使用fileattribs 来获取文件和文件夹名称。此功能递归搜索给定基本文件夹中的所有文件和文件夹，然后您只能选择文件夹。如果您有很多文件或文件夹，它可能会很慢；但它可能会发生在任何其他方法上：

[success,message,messageid] = fileattrib('c:\users\lmendo\Documents\*');
%// final '\*' is needed to make the search recursive
isfolder = [message(:).directory]; %// true for folders, false for files
[folders{1:sum(isfolder)}] = deal(message(isfolder).Name) %// keep folders only
%// folders is a cell array of strings with all folder names

要仅保留最深的文件夹，请使用strmatch。它检查一个字符串（代表一个文件夹）是否与另一个字符串的开头（然后是它的子文件夹）匹配。这比您的 findsubfolders 函数更简单（也许更快）。

isDeepest = cellfun(@(str) numel(strmatch(str,folders))==1, folders);
%// "==1" because each folder at least matches itself. So 1 match indicates
%// it's deepest, more matches indicates it's not.
deepestFolders = folders(isDeepest); %// keep deepest folders only
%// deepestFolders is a cell array of strings with all deepest-folder names