[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
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