ggnbd.LL: Calculate the log-likelihood of the Gamma/Gompertz/NBD model
Description
Calculate the log-likelihood of the Gamma/Gompertz/NBD model
Usage
ggnbd.LL(params, x, t.x, T.cal)
Arguments
params
Gamma/Gompertz/NBD parameters - a vector with r, alpha,
b, s and beta in that order.
x
frequency, i.e. number of re-purchases
t.x
recency, i.e. time elapsed from first purchase to last purchase
T.cal
total time of observation period
Value
a vector of log-likelihoods