Hi Allin

the script worked fine. I think he issue was that I was hoping to get the shaded area to apply to pre-forecast fitted values as well as the post estimation sample estimates, which was why it was unwilling to offer a shaded area but would give only error bars. If I shorten my estimation period to leave to reserve years for the forecast, the the shaded area is graphed for the post estimation sample predicted values.

Problem solved.

Thanks

On Fri, 9 May 2025 at 13:28, Cottrell, Allin <cottrell@wfu.edu> wrote:

On Fri, May 9, 2025 at 5:21 AM Brian Revell <bjr.newmail@gmail.com> wrote:
>
> Re 2025a Gretl version
> Sven
> the 2 attached screen grabs clearly show for both OLS and Arima that the options for the CI are greyed out with effectively a default to range bars.

The "range bars" only situation is supposed to arise when only a
single forecast is possible. Could you try running the following
script and see what you get in the forecast dialog, please?

nulldata 50
set seed 654321
setobs 1 1975 --time
series u = normal()
series y = 5
y = 0.5*y(-1) + u + 0.2*u(-1)
smpl ; 2012
arma 1 1 ; y -w

Allin Cottrell
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