mode of stepwise search, can be one of "both"
(default), "backward", or "forward".
scope
defines the range of models examined in the stepwise search.
This should be a list containing components upper and lower,
both formulae.
k
multiple of the number of degrees of freedom used for the penalty.
Only k = 2 gives the genuine AIC; k = .(log(nobs)) is
sometimes referred to as BIC or SBC.
trace
if positive, information is printed during the running of
stepAIC. Larger values may give more information on the fitting
process.
steps
maximum number of steps to be considered.
Details
Response types:
Surv
Default argument values and further model details can be found in the source
See Also links below.
# \donttest{## Requires prior installation of suggested packages rms and Hmisc to run
library(survival)
fit(Surv(time, status) ~ ., data = veteran, model = SurvRegModel)
# }