llik_pwexp {eventPred} | R Documentation |
Obtains the log likelihood value for piecewise exponential regression.
llik_pwexp(theta, time, event, J, tcut, q, x)
theta |
The parameter vector consisting of gamma for log piecewise hazards and beta for regression coefficients. |
time |
The survival time. |
event |
The event indicator. |
J |
The number of time intervals. |
tcut |
A vector that specifies the endpoints of time intervals for the baseline piecewise exponential survival distribution. Must start with 0, e.g., c(0, 60) breaks the time axis into 2 event intervals: [0, 60) and [60, Inf). By default, it is set to 0. |
q |
The number of columns of the covariates matrix. |
x |
The covariates matrix (excluding the intercept). |
The log likelihood value for piecewise exponential regression.