parsing integers from directory list

I have a directory with files names:

1_d
3_kk
56_rr

I need to parse the list numbers from the file names. I need to output a numerical array

[1 3 56]

is there a simple way to do it?

Answer 1

[Simon]

Hi!

What du you have? An array of strings or a cell array? Are the numbers always in front of the file name?

Suppose you have a cell array C, try using regexp:

C2 = regexp(C, '(\d*)', 'tokens');
C2 = cellfun(@(x) x{1}, C2);
numbers = cellfun(@(x) str2double(x), C2);