[R] Quantile function for the generalized beta distribution of the 2nd kind

Florent Bresson f_bresson at yahoo.fr
Sun Dec 11 15:31:41 CET 2005

I have succeded in defining the cdf of the generalized
beta of the second kind, eg.

pgbeta2 <-  function(quint,b,a,p1,p2) {

but I'm facing problems with the quantile function. I
tried something like 

qgbeta2 <-  function(proba,b,a,p1,p2) {
upper=10^200) }

but it doesn't work. I tried with other non linear
optimization command like optim but it is apparently
not the solution.
Any idea ?

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