ParametricLifetimeModel

class relife.lifetime_model.ParametricLifetimeModel(**kwparams)

Base class for parametric lifetime models in ReLife.

This class is a blueprint for implementing parametric lifetime models. The interface is generic and can define a variadic set of arguments. It expects implementation of the hazard function (hf), the cumulative hazard function (chf), the probability density function (pdf) and the survival function (sf). Other functions are implemented by default but can be overridden by the derived classes.

Note:

The abstract methods also provides a default implementation. One may not have to implement hf, chf, pdf and sf and just call super() to access the base implementation.

Methods:

hf: Abstract method to compute the hazard function. chf: Abstract method to compute the cumulative hazard function. sf: Abstract method to compute the survival function. pdf: Abstract method to compute the probability density function.

Methods

cdf
chf
hf
ichf
isf
ls_integrate
mean
median
moment
mrl
pdf
ppf
rvs
sf
var

property nb_params

Number of parameters.

Returns:

int

Number of parameters.

property params

Parameters values.

Returns:

ndarray

Parameters values

Notes

If parameter values are not set, they are encoded as np.nan value.

property params_names

Parameters names.

Returns:

list of str

Parameters names

Notes

Parameters values can be requested (a.k.a. get) by their name at instance level.

property plot

Provides access to plotting functionnalities