Exercise

Comparing Weibull and Log-Normal Model I

In this exercise, we want to add the correct survival probabilities to a data frame. This data frame will be used to plot the survival curves. surv_wide is a wide data frame containing hormonal therapy information and the survival curves for the Weibull and log-normal models.

The survival, survminer, and reshape2 packages and the GBSG2 data are loaded for you in this exercise.

Instructions

100 XP

Melt the data frame into long format.
Use surv_long$surv_id to add the correct survival probabilities surv to the data frame.