Re: [Gretl-users] Easy Question -- Doing a Naive Forecast

On Fri, 23 Oct 2015, Data Analytics Corp. wrote: I suppose it's arguable that arima should support the null model as a special case, but as things stand gretl's model-printing apparatus is set up on the assumption that there's at least one parameter estimate to show. Here's perhaps a simpler approach: series fcerr = y - y(-1) summary fcerr gnuplot fcerr --time-series --with-lines --output=display Or in GUI mode: * select the variable of interest * choose /Add/First differences... * select the difference and right click: look at Summary statistics, Time series plot, Correlogram, or whatever you fancy. Allin Cottrell