在R语言中进行生存分析时,如果遇到error in surv(xi, di) : time variable is not numeric的错误,通常意味着时间变量xi不是数值类型。为了解决这个问题,你可以按照以下步骤进行: 检查xi和di变量确保它们已被正确加载到R环境中: 确保你已经正确加载了包含xi和di变量的数据集,并且这两个变量是可用的。 确认xi变量...
You should write several functions for predicting the value of some variable on a single day. All these functions should take as their first arguments a datasets frame, containing variables that may be used in making the predict, and as their second argument a series of past values for the v...
You should write several functions for predicting the value of some variable on a single day. All these functions should take as their first arguments a datasets frame, containing variables that may be used in making the predict, and as their second argument a series of past values for the v...
All of the DLL files that are required to run PostgREST are available in the windows installation of PostgreSQL server. Once installed they are found in the BIN folder, e.g: C:\Program Files\PostgreSQL\10\bin. Add this directory to your PATH variable. Run the following from an administrat...
You should write several functions for predicting the value of some variable on a single day. All these functions should take as their first arguments a datasets frame, containing variables that may be used in making the predict, and as their second argument a series of past values for the ...