[R] Looking for non-central F quantile
Spencer Graves
spencer.graves at pdf.com
Sat Mar 8 02:48:31 CET 2003
At least you could get reasonable starting values from qchisq. (If you
also needed it to work in S-Plus, then you would need to port R's
"qchisq" to S-Plus.)
Spencer Graves
Andrew Robinson wrote:
> Greetings all,
>
> I'm trying to figure out how to calculate the inverse CDF (i.e. a
> quantile) for a non-central F distribution. I could put together a quick
> numerical solver routine using the CDF, but I wonder if there's a function
> that I've missed that would be more efficient?
>
> Thank-you,
>
> Andrew
>
> Andrew Robinson Ph: 208 885 7115
> Department of Forest Resources Fa: 208 885 6226
> University of Idaho E : andrewr at uidaho.edu
> PO Box 441133 W : http://www.uidaho.edu/~andrewr
> Moscow ID 83843 Or: http://www.biometrics.uidaho.edu
> No statement above necessarily represents my employer's opinion.
>
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