[R] R and excell differences in calculation F distributionfunction

[Frede Aakmann Tøgersen]

I think you'll have to compare FDIST to pf() and not df()



Best regards

Frede Aakmann Tøgersen
Scientist


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> -----Oprindelig meddelelse-----
> Fra: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] På vegne af Luis Ridao Cruz
> Sendt: 7. august 2007 12:27
> Til: r-help at stat.math.ethz.ch
> Emne: [R] R and excell differences in calculation F 
> distributionfunction
> 
> R-help,
> 
> I'm trying to work out the density function by doing:
> 
> > df(5.22245, 3, 22)
> [1] 0.005896862
> 
> > df(15.20675, 6, 4)
> [1] 0.001223825
> 
> 
> In excell the result is :
> 
> 0.0071060464 <*>   FDIST(5.22245,3,22) 
> 
> 0.0100001406 <-->   FDIST(15.20675,6,4)
> 
> 
> >From my point of view the differences in the second case
> are substantial.
> 
> Can anyone give me a hint on this?
> 
> Thanks in advance
>  
> 
> 
> 
> 
> 
> 
> ----------------------------------------------------------------
> Luis Ridao Cruz
> Faroese Fisheries Laboratory
> Nóatún 1, P.O. Box 3051
> FR-110 Tórshavn
> Faroe Islands
> Tel : (+298) 353900, Tel (direct) : (+298) 353912
> Mob.:(+298) 580800, Fax: : (+298) 353901
> E-mail: luisr at frs.fo
> 
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