Store strings that are produced from a loop

Hello, I want to store strings in a variable that have been provided by aloop. However, I do something wrong because it is stored only the porduced string from loop at my variable. Thi is my code

    for allSS=1:size(scnames,1) 
      nameofsource2open = scnames{allSS,1};
      for RPname2open = 1:4
        readtraf=sprintf('traf_phasRP%d%s',RPname2open,nameofsource2open);
        filename = [readtraf,'.xls']
        if exist(filename, 'file') % File exist
          counterscen2 = counterscen+1
          filename2 = sprintf('trafscenRP%d%s',RPname2open,nameofsource2open)
          alltraf = filename2
        end
      end
    end

thank you in advance

Answer 1

[Walter Roberson]

Before the loop have

alltraff = {};

And in the loop replace

alltraf = filename2

with

alltraf{end+1} = filename2;

[Kelly Kyriakou]

Thank you very much. It works!