On Thu, 24 Nov 2011, Ignacio Diaz-Emparanza wrote:
 I tried to set up a script with periodicity 336 and gretl responded:
 ? setobs 336 1:1
 frequency (336) does not make seem to make sense
 Why not? One observation each half an hour in a week: 48x7=336 
For a non-standard time-series frequency you need to add the 
option --time-series:
<hansl>
nulldata 800
setobs 336 1:1 --time-series
smpl ; 10
print index --byobs
</hansl>
Allin Cottrell