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
