help with "dir" command

good morning I have a problem with the command "dir":

I want to find some files which names are f.e. : 10.txt,11.txt,12.txt, etc. and list them within a cell or an array

I tried with this:

    for i=10:20

      file = dir(fullfile(open_folder, ['*' i '*' '.txt']))
    end

    neither

file(i) = dir(fullfile(open_folder, ['*' i '*' '.txt']))

works (mismatched dimension or something similar).

the resulting structure is just the file with the last numerical value (i.e. '20.txt' in this case)

is there a possibility to have a cell, or a matrix with all the files found?

Thanks

Answer 1

[Image Analyst]

See code samples in the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Answer 2

[Stephen23]

Rather than doing this in a loop, why not use dir 's ability to return multiple matches:

out = dir(fullfile(open_folder,'*.txt'))

This is much neater, faster, and less likely to have bugs than trying to do this in a loop. The usage of fullfile is good code though, so we will keep that!

If required you can sort/filter the strings in out as well, to remove other files that you do not want. You could use regexp for this.

[ludvikjahn]

The problem is that I have a database of many Gigabytes of files '.txt' where I have to sort them and I wanted to extract only those referred to a short period of time.

[Image Analyst]

The sorting takes place inside the loop? What sort of sorting are you doing (no pun intended)?