Dear All,
I am trying to apply the function 'cox.zph' of the library survival, but I receive this error message:
not found the object 'residuals.coxph'.
I have re-installed the library 'survival' without any change and also a search with RSiteSearch was unsuccessful..
Any suggestion?
TIA
Giovanni

PS:
R 2.2.0
Windows XP HE

dr. Giovanni Parrinello
Section of Medical Statistics
Department of Biotecnologies
Viale Europa, 11
25100 Brescia
Italy

Tel: +3930/3717528
Fax: +3930/3717488
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