[Gretl-users] "outfile" with parameters

Hello, I'm trying to have a rapid way to output numbers to files, and wrote the following: # A function to dump numbers to files: function scalar to_file(scalar numb, string format, string filename) set echo off set messages off outfile filename --write printf format, numb outfile --close set echo on set messages on return 0 end function which however doesn't work. By trying different specifications, I think I have understood that the "filename" parameter of "outfile" and the "format" parameter of "printf" cannot be variables, they are parsed directly as strings by the interpreter. Did I understand correctly? Is there anything I can do to solve my problem? I do not care too much, in the end, about "format", but if there is no way to pass an arbitraray string to "outfile" I'm clearly trying something stupid. Thanks in advance Pietro