ParametricLifetimeModel

class relife.lifetime_model.ParametricLifetimeModel(**kwparams)

Base class for lifetime model.

This class defines the structure for creating lifetime model. It is a blueprint for implementing lifetime model expecting a variadic set of arguments. It expects implemantation of hazard functions (hf), cumulative hazard functions (chf), probability density function (pdf) and survival function (sf). Other functions are implemented by default but can be overridden by 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.

Raises:

NotImplementedError: Raised when an abstract method or feature in this class has not been implemented in a derived class.

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 of the core

Notes

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

Parameters can be by manually setting`params` through its setter, fitting the core if fit exists or by specifying all parameters values when the core object is initialized.

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