Horizontal plots of failure and censoring times for recurrent events data are supported.

Parameter estimation and probability plotting for the Gompertz distribution are supported. The Gompertz distribution is characterized by a risk that increases or decreases exponentially with time.

Parameter estimation and probability plotting for the three-parameter Gompertz-Makeham distribution are supported. Similar to the Gompertz distribution, the Gompertz-Makeham distribution contains an added risk term, called the Makeham mortality component, that is constant over time. The Gompertz-Makeham distribution is commonly used to model lifetime past a certain age.