[R] Forecast

[Cedrick Johnson]

?forecast
Maybe ?xts or ?timeSeries if you need to adjust dates, etc.

On 3/11/10, chinna <durgachennu at gmail.com> wrote:
>
> sample report data that i want to forecast
>
> quarter     quarter_index     Revenue
> 2007 Q1       1                  $3,856,799
> 2007 Q2       2                  $4,243,328
> 2007 Q3       3                  $4,930,369
> 2007 Q4       4                  $5,443,579
> 2008 Q1       5                  $5,164,830
> 2008 Q2       6                  $5,104,413
> 2008 Q3       7                  $5,713,240
> 2008 Q4       8                  $6,509,331
> 2009 Q1       9                  $6,271,951
> 2009 Q2       10                $6,657,190
> 2009 Q3       11                $6,979,821
> 2009 Q4       12                $7,581,619
>
>
> (Using the first report i want to generate the below report using R) is it
> possible?
> forecasted report for the year 2010
>
> quarter          Revenue              Revenue Predictor
> 2007 Q1         $3,856,799           $4,032,525
> 2007 Q2         $4,243,328           $4,032,525
> 2007 Q3         $4,930,369           $4,032,525
> 2007 Q4         $5,443,579           $4,032,525
> 2008 Q1         $5,164,830           $4,032,525
> 2008 Q2         $5,104,413           $4,032,525
> 2008 Q3         $5,713,240           $4,032,525
> 2008 Q4         $6,509,331           $4,032,525
> 2009 Q1         $6,271,951           $4,032,525
> 2009 Q2         $6,657,190           $4,032,525
> 2009 Q3         $6,979,821           $4,032,525
> 2009 Q4         $7,581,619           $4,032,525
> 2010 Q1                                   $4,032,525
> 2010 Q2                                   $4,032,525
> 2010 Q3                                   $4,032,525
> 2010 Q4                                   $4,032,525
>
> This is the forecasted report that i get using the reporting tool cognos(BI
> Reporting Tool).
> is this is possible with the R project.
> If possible can u please tell me the way.
>
>
> Thanks in advance
> chinna.
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