On Sat, 20 Feb 2010, Clive Hudson wrote:
 At present im still not 100% sure how  to produce 100% true forcasts
using gretl. Ive been testing using stock data from the sp500 and nasdaq stock
index's
 the code im using is  close_spx is sp500 data close_ndx is nasdaq stock data
 loop i=31..2231
 smpl $i-30 $i-1
 ols close_spx const time close_ndx
 fcast $i $i
 genr pclose_spx[$i] = $fcast
 endloop 
Try:
<script>
smpl 1 30
loop i=31..2231 --quiet
  ols close_spx const time close_ndx --quiet
  fcast i i --quiet
  pclose_spx[i] = $fcast
  smpl +1 +1
endloop
smpl --full
print close_spx pclose_spx -o
</script>
Allin Cottrell