[R] About fitdistr

[Caroline TRUNTZER]

Dear all,
I would like to estimate the parameters of a mixture of two beta
binomial distributions. I saw the function fitdistr from the MASS
library could be a solution but I have some difficulties. Does anyone
know how to specify to fitdistr another function as these which are
predefined? Or is there any other solution to estimate the parameters?
Thank you in advance
Caroline