Calculate the ordinary negative binomial score for each space-time window, given the initial data of counts, expected values, and overdispersion parameters.
negbin_calculations(table, zones)A data.table with columns location, duration, mu,
theta, count. The location column should consist of integers that
are unique to each location. The duration column should also
consist of integers, starting at 1 for the most recent time period and
increasing in reverse chronological order.
A negative binomial distribution parametrized by \(\mu\) and
\(\theta\) (columns mu and theta respectively) has
expected value \(\mu\) and variance \(\mu+\mu^2/\theta\). The
parameter \(\theta\) is referred to as the size in
NegBinomial, and theta in
negative.binomial.
A set of zones, each zone itself a
set containing one or more locations of those found in table.
A data.table with columns zone, duration, statistic.