Re: [R] How to estimate a hazard ratio using an external hazard function

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[R] How to estimate a hazard ratio using an external hazard function

Hi, I would like to compare the hazard functions of two samples using the Cox proportional hazards model. For sample 1 I have individual time-to-event data. For sample 2 I don't have individual data, but grouped data that allows to obtain a hazard function. I am wondering if there is an R