loglike_optim

named vector including "gamma", "mu", and "rho" 
parameters for the appropriate number of seasons

pars

times of death or censoring as Surv objects

Internal function used for computing the log-likelihood of a parameterized 
model within <code><a rd-options="" href="/link/fit_cyclomort?package=cyclomort&version=1.0.2" data-mini-rdoc="cyclomort::fit_cyclomort">fit_cyclomort</a></code>.

Modeling periodic mortality (or other time-to event) processes from right-censored data. Given observations of a process with a known period (e.g. 365 days, 24 hours), functions determine the number, intensity, timing, and duration of peaks of periods of elevated hazard within a period. The underlying model is a mixed wrapped Cauchy function fitted using maximum likelihoods (details in Gurarie et al. (2020) <doi:10.1111/2041-210X.13305>). The development of these tools was motivated by the strongly seasonal mortality patterns observed in many wild animal populations, such that the respective periods of higher mortality can be identified as "mortality seasons".

Eliezer Gurarie

cyclomort

Survival Modeling with a Periodic Hazard Function

Thompson Peter

loglike_optim function

Internal function used for computing the log-likelihood of a parameterized 
model within <code><a rd-options='' href='fit_cyclomort'>fit_cyclomort</a></code>.

loglike_optim: Log-likelihood function

Description

Usage

Arguments

Value

See Also