Struct PHRegTies 

pub struct PHRegTies { /* private fields */ }

A Cox proportional-hazards model with a selectable tie-handling method.

Implementations

impl PHRegTies

pub fn new( time: &[f64], exog: &Array2<f64>, status: &[f64], ties: Ties, ) -> Result<Self>

Build a Cox PH model with the chosen tie-handling method.

time[i] is the event or censoring time, exog has one row per subject (covariates in columns, no implicit intercept — the Cox baseline hazard absorbs it), and status[i] is 1.0 for an observed event and 0.0 for right-censoring.

pub fn breslow_loglike(&self, params: &Array1<f64>) -> f64

Breslow partial log-likelihood evaluated at params.

pub fn efron_loglike(&self, params: &Array1<f64>) -> f64

Efron partial log-likelihood evaluated at params.

pub fn loglike(&self, params: &Array1<f64>) -> f64

Partial log-likelihood under the configured tie-handling method.

pub fn breslow_gradient(&self, params: &Array1<f64>) -> Array1<f64>

Breslow gradient of the partial log-likelihood at params.

pub fn efron_gradient(&self, params: &Array1<f64>) -> Array1<f64>

Efron gradient of the partial log-likelihood at params.

pub fn gradient(&self, params: &Array1<f64>) -> Array1<f64>

Gradient under the configured tie-handling method.

pub fn breslow_hessian(&self, params: &Array1<f64>) -> Array2<f64>

Breslow Hessian of the partial log-likelihood at params.

Negative-definite at the maximum; its negative is the observed information used for standard errors.

pub fn efron_hessian(&self, params: &Array1<f64>) -> Array2<f64>

Efron Hessian of the partial log-likelihood at params.

Negative-definite at the maximum; its negative is the observed information used for standard errors.

pub fn hessian(&self, params: &Array1<f64>) -> Array2<f64>

Hessian under the configured tie-handling method.

pub fn fit(&self) -> Result<PHRegTiesResults>

Estimate the model by Newton iteration on the partial likelihood.

Trait Implementations

impl Clone for PHRegTies

fn clone(&self) -> PHRegTies

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PHRegTies

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.