R help - Apr 2008 - inverse F distribution in R?

Dear all,

I'm looking for a function that calls the inverse F-distribution.  
Something equivalent to FINV in matlab or excel.

Does anyone know if such a function already exists for R? (I haven't  
been able to find one.)

Thanks for any leads.

Best,
Jennifer

Hi Jennifer,

Try ?qf or  help.search("F distribution")

HTH,

Jorge

On Thu, Apr 24, 2008 at 10:49 AM, Jennifer Balch <jennifer.balch@yale.edu>
wrote:
> Dear all,
>
> I'm looking for a function that calls the inverse F-distribution.
> Something equivalent to FINV in matlab or excel.
>
> Does anyone know if such a function already exists for R? (I haven't
> been able to find one.)
>
> Thanks for any leads.
>
> Best,
> Jennifer
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
	[[alternative HTML version deleted]]

Jennifer Balch wrote:
> Dear all,
>
> I'm looking for a function that calls the inverse F-distribution.  
> Something equivalent to FINV in matlab or excel.
>
> Does anyone know if such a function already exists for R? (I haven't  
> been able to find one.)
>
> Thanks for any leads.
>
>   
I would guess that they are qf() or a variant thereof. I gather that
_fpdf
<http://www.mathworks.com/access/helpdesk/help/toolbox/stats/fpdf.html>__,
fcdf
<http://www.mathworks.com/access/helpdesk/help/toolbox/stats/fcdf.html>,
finv
<http://www.mathworks.com/access/helpdesk/help/toolbox/stats/finv.html>,
frnd
<http://www.mathworks.com/access/helpdesk/help/toolbox/stats/frnd.html>
i_n matlab is df, pf, qf, and rf in R. We don't have an equivalent of
fstat for mean and variance of the F distribution (this might actually
be nice to have).



> Best,
> Jennifer
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>   

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