surveillance (version 1.20.3)

imdepifit: Example twinstim Fit for the imdepi Data

Description

data("imdepifit") is a twinstim model fitted to the imdepi data.

Usage

data("imdepifit")

Format

an object of class "twinstim"

See Also

common methods for "twinstim" fits, exemplified using imdepifit, e.g., summary.twinstim, plot.twinstim, and simulate.twinstim

Examples

data("imdepi", "imdepifit")

if (FALSE) {
## reproduce "imdepifit"
myimdepifit <- twinstim(
    endemic = addSeason2formula(~ offset(log(popdensity)) + I(start/365-3.5),
                                S = 1, period = 365, timevar = "start"),
    epidemic = ~ type + agegrp, siaf = siaf.gaussian(),
    data = imdepi, subset = !is.na(agegrp),
    optim.args = list(control = list(reltol = sqrt(.Machine$double.eps))),
    ## the historical default for reltol is 1e-6, which is rather large
    model = FALSE, cumCIF = FALSE
)
stopifnot(all.equal(imdepifit, myimdepifit))
}