用戶定義的函數：找不到對象

Question

我創建R中的自定義功能，我想做一些用戶輸入的Cox模型築底，我的實際公式是這樣的

coxmodel <- function(time= time, status = status, covariate = covariate, dataset = dataset) { 

modellocox <- eval(parse(text = paste("coxph(Surv(", time, ", ", status, "==2) ~", covariate, ", data=", dataset))) 
testproporz <- cox.zph(modellocox) 
} 

但是我得到這個錯誤消息

Error in paste("coxph(Surv(", time, ", ", status, "==2) ~", covariate, : 
object "age" not found 

我如何創建一個函數，它需要字符串用戶輸入並基於此創建公式？

Answer 1

您還沒有paste("coxph(Surv(", time, ", ", status, "==2) ~", covariate,R定義的時代價值正在尋找它的價值。