r proc plot：auc值与坐标点重叠

fit2<-glm(y~x2+x3+x5+x7+x8+x9+x10,train,family = "binomial")
pre<-predict(fit2,test)
modelroc<-roc(test$y,pre)
plot(modelroc, print.auc=TRUE,location=c(0.2,1),auc.polygon=TRUE, grid=c(0.1, 0.2),
     grid.col=c("green", "red"), max.auc.polygon=TRUE,
     auc.polygon.col="skyblue", print.thres=TRUE)

How can I adjust the location of auc value??? Help me,thanks!

我怎样才能调整auc值的位置???帮帮我，谢谢！

1 个解决方案

#1

The coordinates of the auc in the plot.roc function from the library pROC can be adjusted using the arguments print.auc.x and print.auc.y. Example using Sonar data set from mlbench library:

可以使用参数print.auc.x和print.auc.y调整库pROC中plot.roc函数中auc的坐标。使用mlbench库中的Sonar数据集的示例：

library(mlbench)
library(pROC)
data(Sonar)

fit <- glm(Class ~., Sonar[,c(1:5, 61)], family = "binomial")
preds <- predict(fit, Sonar)
modelroc <- roc(Sonar$Class, preds)
plot(modelroc,
     print.auc = TRUE,
     auc.polygon = TRUE,
     grid=c(0.1, 0.2),
     grid.col = c("green", "red"),
     max.auc.polygon = TRUE,
     auc.polygon.col = "skyblue",
     print.thres = TRUE,
     print.auc.x = 0.3,
     print.auc.y = 0.2)