How to count how many sub folders under a folder

In a folder, there are many sub folder, how do we count how many sub folder they are?

[Stephen23]

Note that KSSV's answer actually counts the total contents of a folder, including any files.

See also:

https://www.mathworks.com/matlabcentral/answers/484430-using-struct-dir-selpath-what-do-and-mean-as-struct-name#answer_395754

https://www.mathworks.com/matlabcentral/answers/40949-omitting-pointers-when-listing-folder-contents#answer_50568

https://www.mathworks.com/matlabcentral/answers/13978-list-of-files-sorting#answer_19278

As Walter Roberson wrote in that last link: "In short: if your code assumes that '.' and '..' are the first two entries in a directory, your code has a bug (even in MS Windows). If your code assumes that directory entries are returned in any sorted order, your code has a bug (in all OS.)"

Answer 1

[KSSV]

go the folder...and use

k = dir ;

N = length(k)-2 ;

N should be the number of sub folders.

[Jason]

In Matlab, my current directory is default, ...../bin,how do I go to the directory which I want to?

[Jason]

I mean use command to go to

[Jason]

N = length(k)-2 ; Why we should minutes 2, could you give me some reference? why field 1 and field is . and ..?

[KSSV]

k = dir ;

k will be a structure. First two will give . and .. . So minus 2. There are other ways too .

You can go to your directory either by cd 'path' or using the browse folder icon .

[Stephen23]

Note that this answer actually counts the total contents of a folder, including any files.

[Jason]

Thank you. But his solution work pretty well for me. I just want to check how many items their, I do not care if it is directory or not.

[Thomas Carter]

This answer also includes any files. So I don't think it is the answer

Answer 2

[Stephen23]

The correct answer would be something like this:

P = 'absolute or relative path to the folder';
S = dir(P);
N = nnz(~ismember({S.name},{'.','..'})&[S.isdir])