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prefeclty
2005 Apr 26
1
survreg with numerical covariates
Does anyone know if the survreg function in the survival package can fit
numerical covariates ?
When I fit a survival model of the form
survreg( Surv(time,censored) ~ x )
then x is always treated as a factor even if it is numeric (and even if
I try to force it to be numeric using as.numeric(x). Thus, in the
particular example I am analysing, a simple numerical covariate becomes
a factor