Re: Appropriate prediction model for forecasting shifting trends?

Dnia Tue, 11 Mar 2008 12:32:45 -0700 (PDT)
cheesekeeper <cheesekeeper@xxxxxxxxx> napisał(a):

On Mar 9, 4:38 am, Wit Jakuczun <w...@xxxxxxxxxxxxx> wrote:
Dnia Thu, 6 Mar 2008 06:15:53 -0800 (PST)
cheesekeeper <cheesekee...@xxxxxxxxx> napisał(a):

Thanks for the reply. (both of you) That is very helpful.
Unfortunately, I will not be able to share any of my numbers, as they
are not mine to share, but I'll be investigating a way to implement
ARIMA and intervention detection.

Do NOT implement first! First try to build model, using for example R or
other freely available software. You could also consider buying some
proprietary software. Implementing your own code is not the best
approach but as always it depends :)

Thanks. I'll check those out. Are you advising I don't try to
implement because it's difficult, or because there is already good
software available?
Both ;). Of course "difficult" depends on your resources...

Unfortunately, I do not have access to very sophisticated software
here, as my company expects me to stay within the bounds of Excel.

Good. R can interface with Excel especially if you use Windows environment.

If you have any suggestions for introductory texts or software, please
let me know.

www.r-project.org is what I could suggest. Maybe if you provide us
with more details...?

Best regards
--
[ Wit Jakuczun <W.Jakuczun [at] wlogsolutions.com> ]
[ WLOG Solutions http://www.wlogsolutions.com ]

.

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