fclose error "Not enough input arguments"

I have an .m file that saves the data output from a program into two different text files. The code is as follows:

if isempty (myfile)
  myfile = ['Data_' num2str(nsub) '.txt'];
end
% fileout = ([cd, '\', myfile]);
fileout = myfile;

if isempty(nsub)
  namesubj = 'thresholds.txt';
else
  namesubj = ['Thresholds_' num2str(nsub) '.txt'];
end
filesubj = fopen(namesubj, 'a');
fprintf (filesubj, 'BLOCK\tTHRESHOLD\n');

if exist(fileout, 'file');
  fprintf (fileout, 'nsub\tblock\ttrial\tlevel\tgamma\trispAC\tthreshold\n');
      for i=1:size(MATSAVEDATA,1)
          fprintf(fileout, '%3.0f\t%s\t%s\t%2.0f\t%2.0f\t%4.3f\t%1.1f\t%1.0f\
                  t%4.3f\t%s\n', nsub, ...   %%I TOOK OUT THE REST OF THIS FUNCTION JUST BECAUSE IT IS EXTREMELY LONG AND SCREWS UP THE FORMATTING)
          if i<size(MATSAVEDATA,1)&& MATSAVEDATA (i+1,1)~=  MATSAVEDATA (i,1)||    
                        i==size(MATSAVEDATA,1)
              fprintf (filesubj,'%2.0f\t%3.3f\n',MATSAVEDATA (i,1),MATSAVEDATA (i,6));
          end
      end
end   

fclose (all);

Now, the problem I have is with fclose. When I run the program it gives me the error "Not enough input arguments." I tried changing the end to:

fclose (fileout);
fclose (filesubj);

But MATLAB gave me an error that said I needed to use fclose (all). I don't understand what the issue is here, fclose (all) should just close both of the files, what does it mean that there aren't enough input arguments?

Answer 1

[Jan]

"fclose(all)" calls the function all, but you want:

fclose('all')

which is equivalent to:

fclose all

For exactly such cases it is stated so often in this forum, that the complete error message should be (read and) posted:

 ??? Error using ==> all
 Not enough input arguments.

[Ryan]

Thanks, heh, I actually figured this out about 10 seconds after I posted my question. It's always the dumb little things like that ...

Answer 2

[Friedrich]

Hi,

e.g. this call

fprintf (fileout, 'nsub\tblock\ttrial\tlevel\tgamma\trispAC\tthreshold\n');

is not correct since fprintf expects a file pointer and not a file name. I think this is just a little typo since you are checking for the existence of that file one line higher. Change it to filesubj and the fclose to fclose(filesubj) should solve the issue.

[Ryan]

Yeah, that was a typo. Good catch.