get.tvcoef: helper function to get time-varying coefficients
In surtvep: Cox Non-Proportional Hazards Model with Time-Varying Coefficients

get.tvcoef

R Documentation

helper function to get time-varying coefficients

Description

The function gives the time-varying coefficients based on a fitted coxtv or coxtp subject. Users can specify the time points to calculate the time-varying coefficients.

Usage

get.tvcoef(fit, time)

Arguments

`fit`	model from `coxtv` or `coxtp`.
`time`	time points to calculate the time-varying coefficients. If `NULL`, the observed event times for fitting the model will be used.

Value

A matrix of the time-varying coefficients. The dimension is the length of time by nvars, where nvars is the number of covariates in the fitted mode. Each row represents the time-varying coefficients at the corresponding time.

Examples

z     <- ExampleData$z
time  <- ExampleData$time
event <- ExampleData$event
fit   <- coxtv(event = event, z = z, time = time, degree = 2)
coef  <- get.tvcoef(fit)

surtvep documentation built on Oct. 17, 2023, 5:07 p.m.