Define the strata for a new dataset
Define the strata in a dataset to match those of a stratified Cox model
coxStrata(object, data, sterms, strata.vars, strata.levels) ## S3 method for class 'cph' coxStrata(object, data, sterms, strata.vars, strata.levels) ## S3 method for class 'coxph' coxStrata(object, data, sterms, strata.vars, strata.levels) ## S3 method for class 'phreg' coxStrata(object, data, sterms, strata.vars, strata.levels)
object |
The fitted Cox regression model object either
obtained with |
data |
a |
sterms |
terms in the formula corresponding to the strata variables |
strata.vars |
the name of the variables used to define the strata |
strata.levels |
a named list containing for each variable used to form the strata all its possible levels |
levels |
the strata levels that have been used to fit the Cox model |
if no strata variables returns a vector of "1" (factor).
Brice Ozenne broz@sund.ku.dk
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