define a pattern to use with dir and get the file names containing numbers

Hi

I need to 'dir' a folder containing files that has only numbers in their file name:

165454.txt

216541ffgb.txt

In this case, I want to see only the first file in my 'dir' result.

One way is to dir and then filter them using pattern but I do not want to do it.

Answer 1

[Jan]

This does not work with the patterns of the operating system.

Use a regexp call to filter the names instead:

List   = dir('*.txt'):
Name   = {List.Name};
% Name = {'1234.txt', '1234s.txt', '1265', 'a1234.txt'};
matchC = regexp(Name, '^\d+\.txt', 'start')   % Or: '^[0-9]+\.txt'
match  = ~cellfun('isempty', matchC)
List   = List(match);