Section: FreeMat Functions
quiet function controls how verbose the interpreter
is when executing code.  The syntax for the function is
quiet flag
where flag is one of
'normal' - normal output from the interpreter
 'quiet' - only intentional output (e.g. printf calls and
disp calls) is printed.  The output of expressions that are not
terminated in semicolons are not printed.
 'silent' - nothing is printed to the output.
 quiet command also returns the current quiet flag.