"Ivone Figueiredo" <[EMAIL PROTECTED]> writes:
> Hi,
>
> I would like to estimate the parameters of a mixture of two Weibull
> distributions by the maximum likelihood method. Is it possible to do it with
> fitdist?
Yes (in principle at least). Just define your mixture density as
something like
mixt <- function(x,p,sh1,sc1,sh2,sc2)
p*dweibull(x,sh1,scale1)+
(1-p)*dweibull(x,sh2,scale2)+
and apply fitdistr to that.
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907
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