A much simpler way to build your filename would be with just one line:
filename = sprintf('data%05d', filenumber); %filename will consist of data always followed by 5 digits padded with as many zeros as necessary
%where filenumber is your badly named i and filename is your badly named s
Use descriptive names for your variables. It makes it much easier for readers unfamiliar with your code to understand what is going on.
That part of the code:
while fgetl(fid)~=-1;
R=R+1;
A = sscanf(tline,'%f', [1,4]);%The 4 columns are stored in A
fprintf(fid2,'%f %f\n',B);
end
makes no sense at all. It reads a line from the file and discard the content immediately, then reads floating value from a tline string that is not declared anywhere and never change.
What is the real code you're using?
