y_train <- Surv(train$time,train$status)

根据引用\[3\]中的代码，y_train是用来存储训练集的生存时间和生存状态的变量。在这个代码中，y_train被定义为Surv(train$time,train$status)，其中train$time是训练集的生存时间，train$status是训练集的生存状态。所以y_train是一个用来存储训练集生存时间和生存状态的变量。
#### 引用[.reference_title]
- *1* [生信跑cox出现错误](https://blog.csdn.net/Fredlin98/article/details/129679152)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* *3* [Cox回归校准曲线(测试集)的实现方法（下）](https://blog.csdn.net/Ayue0616/article/details/130536102)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]