prof_exp_scale: Profile log likelihood for the scale parameter of the exponential distribution

Description

This internal function is used to produce threshold stability plots.

Usage

prof_exp_scale(
  mle = NULL,
  time,
  time2 = NULL,
  event = NULL,
  thresh = 0,
  ltrunc = NULL,
  rtrunc = NULL,
  type = c("right", "left", "interval", "interval2"),
  level = 0.95,
  psi = NULL,
  weights = NULL,
  confint = TRUE,
  arguments = NULL,
  ...
)

Value

a vector of length three with the maximum likelihood of the scale and profile-based confidence interval

Arguments

mle: an object of class elife_par
time: excess time of the event of follow-up time, depending on the value of event
time2: ending excess time of the interval for interval censored data only.
event: status indicator, normally 0=alive, 1=dead. Other choices are TRUE/FALSE (TRUE for death). For interval censored data, the status indicator is 0=right censored, 1=event at time, 2=left censored, 3=interval censored. Although unusual, the event indicator can be omitted, in which case all subjects are assumed to have experienced an event.
thresh: vector of thresholds
ltrunc: lower truncation limit, default to NULL
rtrunc: upper truncation limit, default to NULL
type: character string specifying the type of censoring. Possible values are "right", "left", "interval", "interval2".
level: level of the confidence interval
weights: weights for observations
confint: logical; if TRUE (default), return confidence intervals rather than list
arguments: a named list specifying default arguments of the function that are common to all elife calls
...: additional arguments for optimization, currently ignored.