how to delimit the file in matlab?

end hi ..I NEED to append the .run files to excel file.the data inside each .run file will be like below, 
ex:
SAMPLE_20120807_1806   0 +1.122117E+1 +7.190077E+0 +1.460343E+1 +1.352402E+0 +1.116599E+1

i done appending.but in the output excel file,the above line are stored in first cell itself(1*1).its not delimited. i am stuck with this delimit for my input file. delimiting my above examples is possible in matlab? help me ..

if true
   pathName = 'C:\Temp';
fileList = dir(fullfile(pathName, '*.run'));
out      = fopen(fullfile(pathName, 'append.xls'), 'w');
for k = 1:numel(fileList)
s = fileread(fullfile(pathName, fileList(k).name));
fwrite(out, s, 'char');
end
fclose(out)
end

[Jan]

Are you talking about a tab separated text file or a binary Excel file? Both can get the file extension ".xls", but the handling is very different.

[sandy]

It's a tab separated text file.

[dpb]

doc dlmwrite

NB: if you're trying to append to an existing file, be sure the fopen argument is for append or use fseek to position at end before writing or you'll overwrite the existing file content.