Hello,
I would like to fit a mixture of two Weibull distributions to my data, estimate
the model parameters, and compare the fit of the model to that of a single
Weibull distribution.
I have used the mix() function in the 'mixdist' package to fit the mixed
distribution, and have got the parameter estimates, however, I have not been
able to get the log-likelihood for the fit of this model in order to compare it
to the single distribution.
I have also had a look at the 'Mixtools' and 'Flexmix' packages. With both of
these it is possible to fit a mixture of distributions, but, as far as I can
tell, these are pre-defined and do not have a function for a mixture of two
Weibull distributions.
I have used the 'fitdistrplus' package to fit the single distribution.
Does anyone have any suggestions either for getting the log-likelihood for
models fitted with the mix() function, or other packages / functions which
allow me to fit a double Weibull and get the log-likelihood for the model?
Any suggestions are much appreciated!
Best wishes,
Nienke
----------------------------------------------------------------------------------------------
Nienke Alberts
PhD Candidate
Centre of Research in Evolutionary & Environmental Anthropology
University of Roehampton
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