[R] schoenfeld residuals in the cox.zph function

From: Christoph Leuchtner <christophleuchtner_at_web.de>
Date: Thu 20 Oct 2005 - 00:42:37 EST

To R-project help

I work with a clinical dataset including about 27,000 patients and I wanted to do some model diagnostics on cox regression models with frailty effects (for every patient). But in this case the cox.zph function did not work. I always got the following error message:

Fehler in residuals.coxph(fit, "schoenfeld") :

        NA/NaN/Inf in externem Funktionsaufruf (arg 5)

Does anyone know what's wrong? I did the same without using frailty effects and everything was o.k. What could I do?

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Oct 20 01:01:55 2005

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