dir() gives extra information

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?

Answer 1

[Walter Roberson]

MyFolderInfo = dir('myfolder');

mask = ismember({MyFolderInfo.name}, {'.', '..'});
MyFolderInfo(mask) = [];   %get rid of . and .. directories

num_subfolder = sum( [MyFolderInfo.isdir] );

Answer 2

[Image Analyst]

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.