pomp (version 1.19)

ricker: Ricker model with Poisson observations.

Description

ricker is a pomp object encoding a stochastic Ricker model with Poisson measurement error.

Details

The state process is \(N_{t+1} = r N_{t} \exp(-c N_{t}+e_{t})\), where the \(e_t\) are i.i.d. normal random deviates with zero mean and variance \(\sigma^2\). The observed variables \(y_t\) are distributed as \(\mathrm{Poisson}(\phi N_t)\).

See Also

pomp, gompertz, and the tutorials on the package website.

Examples

# NOT RUN {
pompExample(ricker)
plot(ricker)
coef(ricker)
# }