What about correlation^2 between forecast and actual values?
2012/7/22 yadong li <yadong007(a)gmail.com>:
sorry I forgot to say clear. my out of sample is part of whole
sample. for
example: the whole sample is knew as A +B, I use A as In sample and B as out
of sample
thanks for your reply
yadong
On Sun, Jul 22, 2012 at 10:08 PM, Johannes Lips <johannes.lips(a)gmail.com>
wrote:
>
> yadong li wrote:
> > is there any way to obtain out of sample R square using Gretl ?
> > I tried many time but couldn't figure it out.
> I would say, by definition an out-of sample R-square couldn't exist.
>
http://encyclopedia.thefreedictionary.com/R+Square
> The reason for that is, that the R-square is calculated using the
> difference between the model and the actuals. So it's kind of hard to
> get it if there are no actuals ;-)
>
> Johannes
> >
> > appreciate for help
> >
> >
> > best,
> >
> >
> > yadong
> >
> >
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