Zero-inflated Poisson distribution maximum likelihood estimation

For the density function of the zeero-inflated Poisson distribution see Zero-inflated Poisson distribution.

Usage

mlzip(x, na.rm = FALSE, ...)

Arguments

x: a (non-empty) numeric vector of data values.
na.rm: logical. Should missing values be removed?
...: Not currently in use.

Value

mlzip returns an object of class univariateML. This is a named numeric vector with maximum likelihood estimates for lambda and pi and the following attributes:

model: The name of the model.
density: The density associated with the estimates.
logLik: The loglikelihood at the maximum.
support: The support of the density.
n: The number of observations.
call: The call as captured my match.call

References

Johnson, N. L., Kemp, A. W., & Kotz, S. (2005). Univariate Discrete Distributions (3rd ed.). Wiley-Blackwell.

Examples

mlzip(corbet)
#> Maximum likelihood estimates for the Zero-inflated Poisson model 
#> lambda      pi  
#>  6.599   0.000