hello,
i want to differentiate of L with respect to b
when:
L= k*ln (k/(k+mu)) + sum(y) * ln (1-(k/mu+k)) #(negative binomial ln
likelihood)
and
ln(mu/(mu+k)) = a+bx #link function
how can i do it in R?
thank you.
_________________
Best Regards
Niloofar.Javanrouh
Ph.D Student of BioStatistics
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