dir() gives extra information

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monkey_matlab
monkey_matlab 2016-11-11
回答： Walter Roberson 2016-11-11
Hello, I wanted to just get the number of subfolders from a specific main folder. The main folder contains files, together with sub-folders. How do I get just the number of folders?
If I use
size(dir())
I get everything in the main folder. How to get just the number of sub-folders?

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Walter Roberson
Walter Roberson 2016-11-11
MyFolderInfo = dir('myfolder');
mask = ismember({MyFolderInfo.name}, {'.', '..'});
MyFolderInfo(mask) = []; %get rid of . and .. directories
num_subfolder = sum( [MyFolderInfo.isdir] );

更多回答（1 个）

Image Analyst
Image Analyst 2016-11-11
编辑：Image Analyst 2016-11-11
Look up isdir() in the help. Hopefully it's obvious what to do from there.
Actually dir() tells you:
MyFolderInfo = dir('myfolder')
MyFolderInfo =
5×1 struct array with fields:
name
folder
date
bytes
isdir
datenum
See? The structure has an "isdir" field that flags whether or not the file returned is a folder or not.

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