zipgam: Zero-inflated Poisson GAM

In AustralianAntarcticDataCentre/zigam: EM implementation of zero-inflated GAMs

Zero-inflated Poisson GAM

Description

Fit a zero-inflated Poisson Generalized Additive Model using the EM Algorithm

Usage

zipgam(
  lambda.formula,
  pi.formula,
  data,
  knots = NULL,
  lambda = NULL,
  pi = NULL,
  gamma.pi = 1,
  gamma.lambda = 1,
  select = FALSE,
  method = "GCV.Cp",
  min.em = 5,
  max.em = 50,
  tol = 0.01
)

Arguments

lambda.formula	formula for the count model
pi.formula	formula for the binary model
data	a data frame or list containing the model response variable and covariates required by the formula.
knots	an optional list of knot values to be used for basis construction.
lambda	initial lambda vector
pi	initial pi vector
gamma.pi	binary model gamma
gamma.lambda	count model gamma
select	include model selection penalty
method	method for selecting smoothing parameters
min.em	minimum number of EM iterations
max.em	maximum number of EM iterations
tol	tolerance (default=1.0E-2)

AustralianAntarcticDataCentre/zigam documentation built on June 30, 2023, 11:49 a.m.