Yes, fgetl is still a valid built-in MATLAB function.
(Notice, the error message says, "error in fgetl (line 32)", so you know MATLAB is finding fgetl and getting to line 32 of it. If fgetl was no longer a valid function, you'd get an error message along the lines of "Unrecognized function or variable fgetl ...")
We'd have to see the rest of the error message to know for sure what the problem is, but it's most likely:
"Invalid file identifier. Use fopen to generate a valid file identifier."
If that is the case, it means that the file
strcat(path{i},'\nod_inf.out')
could not be opened for reading. Does the file exist?
Generally, every time you (or the person who wrote this code) use fopen, you should check that the file was successfully opened, and if not (in which case the file ID is -1) take an appropriate action (e.g., throw an error - fopen returns a message as its second output for you for this purpose - or just return from the function). For instance:
prof_out=zeros(101,num_sim+1);
for i=1:num_sim
file_name = strcat(path{i},'\nod_inf.out');
[fileID_out,err_msg] = fopen(file_name);
if fileID_out == -1
error('Could not open %s: %s',file_name,err_msg);
end
skip_lines=123;
for k=1:(skip_lines)
x=fgetl(fileID_out);
end
temp=fscanf(fileID_out,'%f',[11,101])';
prof_out(:,i+1)=temp(:,4);
fclose(fileID_out);
end
prof_out(:,1)=temp(:,2);
This prevents subsequent errors in fgetl or whatever file reading/writing function(s) are used, and lets you know the root cause of the problem right away.
