glm.cox: Creates a Cox GLM family object.

Description

A GLM family object specifies the type of model fit, provides the appropriate response object and makes sure it is represented in the right form for the model family, and allows for optional parameters such as a weight vector.

Usage

glm.cox(
  stop,
  status,
  start = -Inf,
  strata = NULL,
  weights = NULL,
  tie_method = c("efron", "breslow")
)

Value

Cox GLM object.

Arguments

stop: Stop time vector.
status: Binary status vector of same length as stop, with 1 a "death", and 0 censored.
start: Start time vector. Default is a vector of -Inf of same length as stop.
strata: Observations can belong in strata, labeled 1,2, .... If strata = NULL then all observations are in a single stratum.
weights: Observation weights, with default NULL.
tie_method: The tie-breaking method - one of "efron" (default) or "breslow".

Author

James Yang, Trevor Hastie, and Balasubramanian Narasimhan
Maintainer: Trevor Hastie hastie@stanford.edu

Examples

Run this code

n <- 100
start <- sample.int(20, size = n, replace = TRUE)
stop <- start + 1 + sample.int(5, size = n, replace = TRUE)
status <- rbinom(n, 1, 0.5)
strata <- sample(c(1,2), n, replace = TRUE)
obj1 <- glm.cox(stop, status)
obj2 <- glm.cox(stop, status, start = start)
obj3 <- glm.cox(stop, status, start = start, strata = strata)