当我尝试加载 pROC 库并获取 AUC 值时出现错误消息

Question

我试图加载pROC库，但它给了我错误。 我也尝试获取 AUC 值，但它仍然给我错误。 我需要你的帮助，我对 R 很陌生。 谢谢你。

以下是我收到的错误消息：

library(pROC)  #For area under the receive operation characteristics (ROC) curve 
Type 'citation("pROC")' for a citation.

Attaching package: ‘pROC’

The following objects are masked from ‘package:stats’:

    cov, smooth, var


> ccfd.testc$Class <- ordered(ccfd.testc$Class, levels=c("0", "1"))
> ccfd.testc$Pres <- ordered(ccfd.testc$Pred, levels=c("0", "1"))
> auc(ccfd.testc$Class, ccfd.testc$Pred)
Setting levels: control = 0, case = 1
Error in roc.default(response, predictor, auc = TRUE, ...) : 
Predictor must be numeric or ordered.

> library(rpart.plot) # In order to visualise the Tree
Loading required package: rpart

> View(ccfd.testc)
> auc(ccfd.testc$Class, ccfd.testc$Pred)
Setting levels: control = 0, case = 1
Error in roc.default(response, predictor, auc = TRUE, ...) : 
Predictor must be numeric or ordered.