MATLAB: How do i solve this situation

functionstringwhile

I have list of file like this.
trj.hst.00.+00
trj.hst.01.+00
trj.hst.02.+00
trj.hst.03.+00
…
So, I want to use while loop and The number of files is not fixed
I do not know whether to use some functions.
Are as follows: The code I wrote
 c=0;
while (?)
    file = sprintf('trj.hst.%02d.+00',c);
 fid = fopen(file);
 tline = fgetl(fid);
 while ischar(tline)
matches = strfind(tline, '#');
   num = length(matches);
   if num > 0
     tline = fgetl(fid);
   else
       B_temp = tline;
       B = fscanf(fid, '%g %g %g %g %g %g %g %g', [8 inf]);
       tline = fgetl(fid);
   end
 end
 fclose(fid);
 B2 = str2num(B_temp);
B = B';
 res = [B2; B];
 DATA(1,c).res = res;
% DATA.res_tline = B_temp;
c=c+1;
end
Thanks in advance.

Best Answer

Use the output fid (fileID) from fopen for your while condition. When the while loop gets to the end of the list, if the file does not exist then fopen cannot open the file and fileID is -1.
Only use the functions when fopen successfully opens a file, i.e. when it returns a file identifier greater >= 3
fid=0; c=0;
  while fid ~= -1
      file = sprintf('trj.hst.%02d.+00',c);
      fid = fopen(file); 
      if fid < 3 continue; end 
          disp(['MIHYUN: Reading ' file])
          tline = fgetl(fid); 
          while ischar(tline)
              matches = strfind(tline, '#');
              num = length(matches);   
              if num > 0
                  tline = fgetl(fid);
              else
                  B_temp = tline;
                  B = fscanf(fid, '%g %g %g %g %g %g %g %g', [8 inf]);
                  tline = fgetl(fid);
              end
          end
          fclose(fid); 
          B2 = str2num(B_temp);
          B = B'; 
          res = [B2; B]; 
          DATA(1,c).res = res;
          DATA.res_tline = B_temp;
      c=c+1;
  end
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