Log-likelihood for multiphase additive hazard model

Usage

.hzr_logl_multiphase(
  theta,
  time,
  status,
  time_lower = NULL,
  time_upper = NULL,
  x = NULL,
  weights = NULL,
  phases,
  covariate_counts,
  x_list,
  objective = c("likelihood", "sas"),
  return_gradient = FALSE,
  return_hessian = FALSE,
  ...
)

Arguments

theta: Full parameter vector (internal scale).
time: Numeric vector of follow-up times (n).
status: Numeric event indicator: 1 = event, 0 = right-censored, -1 = left-censored, 2 = interval-censored.
time_lower: Optional lower bounds for interval censoring.
time_upper: Optional upper bounds for left/interval censoring.
x: Design matrix (unused directly; kept for interface compatibility).
phases: Named list of validated hzr_phase objects.
covariate_counts: Named integer vector of per-phase covariate counts.
x_list: Named list of per-phase design matrices.
objective: Which interval-censored contribution to accumulate; see .hzr_logl_interval(). Exact-event, right-censored and left-censored rows are unaffected.
return_gradient: Logical (ignored; gradient via separate function).
return_hessian: Logical (ignored).
...: Ignored.

Value

Scalar log-likelihood. Returns -Inf for infeasible parameters.