fprintf doesn't print anything

I am trying to write some data to a file using the fprintf command, but when I run the command the file remains blank. I don't receive any errors, and I cannot identify anything unusual happening.

A = rand(10,7);
fid = fopen('filename.txt','w');
fprintf(fid,'%-6.3d  %-12.8d  %-12.8d  %-10.8d  %-10.8d  %-10.8d  %-4.0d\n',A);
fclose fid

I've used nearly the exact same fprintf line (just changed variable names) before in a different script and it worked fine so I don't understand why it's not printing anything here.

Answer 1

[Image Analyst]

I just tried this:

A = rand(10,7);
fid = fopen('filename.txt','wt');
fprintf(fid,'%-6.3d  %-12.8d  %-12.8d  %-10.8d  %-10.8d  %-10.8d  %-4.0d\n', A);
fclose(fid);

winopen('filename.txt');  % Only if using Windows!

and it worked fine for me. You might change 'w' to 'wt' but it worked regardless.

[Bob Thompson]

In all honestly, I wasn't sure if it was going to be repeatable, since it seemed to run fine in my other code. That's part of why I was so confused and needed to ask.

Either way, using 'wt' did work, so thanks.