nb_theta: Negative binomial parameter theta

In gratia: Graceful 'ggplot'-Based Graphics and Other Functions for GAMs Fitted Using 'mgcv'

Negative binomial parameter theta

Description

Negative binomial parameter theta

Usage

nb_theta(model)

## S3 method for class 'gam'
nb_theta(model)

Arguments

model

a fitted model.

Value

A numeric vector of length 1 containing the estimated value of theta.

Methods (by class)

• nb_theta(gam): Method for class "gam"

Examples

load_mgcv()
df <- data_sim("eg1", n = 500, dist = "poisson", scale = 0.1, seed = 6)

m <- gam(y ~ s(x0, bs = "cr") + s(x1, bs = "cr") + s(x2, bs = "cr") +
         s(x3, bs = "cr"), family = nb, data = df, method = "REML")
## IGNORE_RDIFF_BEGIN
nb_theta(m)
## IGNORE_RDIFF_END

gratia documentation built on Feb. 16, 2023, 10:40 p.m.