Survival analysis using R -

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on running survival model using survival package encountered strange error message unable understand.

the error message 

error in surv(time, event) : time , status different lengths

the number of observations in each column used in model1 same.

> mydata3<-read.csv(file.choose()) > attach(mydata3) > event<-event > time<-time > x<-cbind(wdcl,age,sex) > ch<-coxph(surv(time,event)~x,method="breslow")

thanks , regards.

you need specify formula correctly, adding arguments.

try this:

coxph(surv(time, event) ~ wdcl + age + sex, method="breslow", data = mydata3)

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