[R] A question about forecasting with R

Gabor Grothendieck ggrothendieck at gmail.com
Thu Apr 2 12:44:11 CEST 2009


The forecast package has a number of forecasting methods
you could try.

On Thu, Apr 2, 2009 at 3:17 AM, minben <minbenh at gmail.com> wrote:
> I want to forecaste the call number everyday for a call-center. Now I
> have removed the influence of the fluctuation with some method, so
> only thing left is to analyze the trend of the call number every day.
> I have thought of two ways: regression and HoltWinters smooth. But
> when I use regression, I find some day's call number will bcome
> negative, which is obviously unreasonabe. If I use HoltWinters
> smooth ,I let the gamma parameter equal to 0 because I needn't analyze
> the seasonal fact, but the result shows that the increasing trend is
> too big. I adjust the parameter alpha and beta ,which makes the result
> better,but I don't know if it's right. In this case of situation,which
> way is better? Or is there another appropriate  method?
>
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