[R] extractAIC.survreg problem with df

Stefano Calza stecalza at tiscali.it
Wed Apr 21 17:13:43 CEST 2004

Hi everybody.

I'm having problems with the extractAIC.survreg function and the edf

I get weird results which I think are due to the fact that the function defines edf as (from the stats package in 1.9.0 source code)

n <- length(fit$residuals)
edf <- n-fit$df.residual

But in a survreg object there's no attribute residuals!!??

if in the function I use instead

n <- length(residuals(fit)

everything's fine, or better

edf <- fit$df

Am I missing something?


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