[R] How to get F Distribution values in R

[Liaw, Andy]

> outer(1:3, 1:3, function(df1, df2) qf(0.95, df1, df2))
         [,1]     [,2]      [,3]
[1,] 161.4476 18.51282 10.127964
[2,] 199.5000 19.00000  9.552094
[3,] 215.7073 19.16429  9.276628

Andy

> From: pio claudio
> 
> is x in df(x,df1,df2) the significance level? the
> alpha?
> 
> 
> alpha .05
>     \v1    1       2       3
>    v2
>   1      161.448 199.500 215.707
>   2       18.513  19.000  19.164
>   3       10.128   9.552   9.277
> this is a portion of the F distribution table..
> 
> sorry, but i still cant figure out how to use df()(or
> pf())...
> 
> thanks
> 
> 
> pio claudio wrote:
> 
> >i tried to use df(x,df1,df2) but the values arent the
> >same when i looked it up in a F Distribution table..
> >
> >How to get the same F Distribution values in R as in
> >the f table?
> >
> >______________________________________________
> >R-help at stat.math.ethz.ch mailing list
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> >PLEASE do read the posting guide! 
> http://www.R-project.org/posting-guide.html
> >
> >
> >  
> >
> You looked up the F density (d in df is density) Try
> pf, which gives 
> cumulative probabilities
> 
> -- 
> 
> Kjetil Halvorsen.
> 
> 
> 
> 
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