RVAideMemoire (version 0.9-6)

cox.resid: Martingale residuals of Cox model

Description

Plot martingale residuals of a Cox model against fitted values to check for log-linearity of covariables.

Usage

cox.resid(model, covar)

Arguments

model

coxph model.

covar

list of covariables.

References

Fox, J. 2002 Cox Proportional-Hazards Regression for Survival Data.

See Also

coxph

Examples

# 'kidney' dataset in MASS package
data(kidney)
model<-coxph(Surv(time,status)~age+frail,data=kidney)
cox.resid(model,list(age=kidney$age,frail=kidney$frail))