Suppress output from psql?

Is there a way 'within' psql to suppress output?

One of our cron scripts calls a sql file which contains various database
commands (ALTER TABLEs, UPDATEs, etc) and various user-defined functions.
So within this sql file there are various SELECT * FROM myFunction(); which
sends output to the user from cron. I can't see anyway to suppress this from
the psql docs and I don't believe that I can suppress it from cron
either (I'll do
some more checking there).

Thanks
Ron