How to use "dir" command to get desired files in a folder?

I can read files inside a folder by using this piece of code..

Flame_speed_folder = '/home/ali/Test_rig'; 
Allfiles = dir(fullfile(Flame_speed_folder, '*.txt'));
allData = [];
    for k = 1:length(Allfiles)
      initialFileName = Allfiles(k).name;
      fullFileName = fullfile(Flame_speed_folder, initialFileName);
      READ=dlmread(fullFileName,'',1,0,"emptyvalue",911911911);
      allData(end+1:end+size(READ,1), :) = READ;
    end  

How ever this will read all txt files in that folder.

I have files like "ign_phi1.0_p20E05_50.txt", "ign_phi1.0_p3.75E05_37.txt", "ign_phi2.0_p3.75E05_47.txt".............. and so one and another types of file like "lfs_p1.01E05_T298_15.txt", "lfs_p1.01E05_T298_16.txt"..... and so on.

How can i read the "ign" and "lfs" files separeately using this "dir" command.

Answer 1

[Fangjun Jiang]

dir('ign*.txt') and dir('ifs*.txt') should be able to separate them.

[Mr. 206]

Ok, it works. Thanks

But it prints the output in a serial of "ign_phi1.0_p20E05_50.txt", "ign_phi1.0_p3.75E05_37.txt", "ign_phi2.0_p3.75E05_47.txt".

But i want the output in a serial of "ign_phi1.0_p20E05_37.txt", "ign_phi1.0_p3.75E05_47.txt", "ign_phi2.0_p3.75E05_50.txt".

[Fangjun Jiang]

It is sorted alphabetically with the whole file name. If you want to sort by the last two characters of the file name, you need to do a further process.

[Mr. 206]

Do you have any idea regarding this?

[Image Analyst]

Use fliplr() and then sort(), then fliplr() again.

[Fangjun Jiang]

a=dir('ign*.txt');
b={a.name};
c=cellfun(@(x) x(end-5:end),b,'uni',false);
[d,index]=sort(c);
e=a(index);