如何在 R 中的一个图中组合多个 roc 曲线?
How to combine several roc curves in one graph in R?
我为4个模型绘制了4条roc曲线,想把它们放在一张图中以便比较。
library(pROC)
lr.probs <- predict(lr_model, newdata=test1, type='response')
lr.plot <- plot(roc(test1$Y,lr.probs))
gbm.probs <- predict(gbm,test1\[,predictorNames0\],type="prob")
gbm.plot <-plot(roc(test1$Y,gbm.probs\[,2\]))
rf.probs <- predict(rf,test1\[,predictorNames0\],type="prob")
rf.plot <-plot(roc(test1$Y,rf.probs\[,2\]), col="blue")
xgb.probs <- predict(model_xgb, newdata=d_test, type='response')
xgb.plot <- plot(roc(test2$Y,xgb.probs))
它现在给了我 4 个单独的图表
您可以将 plot
函数与 add=TRUE
参数一起使用:
lr.plot <- plot(roc(test1$Y,lr.probs))
gbm.plot <-plot(roc(test1$Y,gbm.probs\[,2\]), add=TRUE, col="red")
rf.plot <-plot(roc(test1$Y,rf.probs\[,2\]), add=TRUE, col="blue")
xgb.plot <- plot(roc(test2$Y,xgb.probs), add=TRUE, col="green")
或者您可以使用 lines
函数:
lr.plot <- plot(roc(test1$Y,lr.probs))
gbm.plot <-lines(roc(test1$Y,gbm.probs\[,2\]), col="red")
rf.plot <-lines(roc(test1$Y,rf.probs\[,2\]), col="blue")
xgb.plot <- lines(roc(test2$Y,xgb.probs), col="green")
我为4个模型绘制了4条roc曲线,想把它们放在一张图中以便比较。
library(pROC)
lr.probs <- predict(lr_model, newdata=test1, type='response')
lr.plot <- plot(roc(test1$Y,lr.probs))
gbm.probs <- predict(gbm,test1\[,predictorNames0\],type="prob")
gbm.plot <-plot(roc(test1$Y,gbm.probs\[,2\]))
rf.probs <- predict(rf,test1\[,predictorNames0\],type="prob")
rf.plot <-plot(roc(test1$Y,rf.probs\[,2\]), col="blue")
xgb.probs <- predict(model_xgb, newdata=d_test, type='response')
xgb.plot <- plot(roc(test2$Y,xgb.probs))
它现在给了我 4 个单独的图表
您可以将 plot
函数与 add=TRUE
参数一起使用:
lr.plot <- plot(roc(test1$Y,lr.probs))
gbm.plot <-plot(roc(test1$Y,gbm.probs\[,2\]), add=TRUE, col="red")
rf.plot <-plot(roc(test1$Y,rf.probs\[,2\]), add=TRUE, col="blue")
xgb.plot <- plot(roc(test2$Y,xgb.probs), add=TRUE, col="green")
或者您可以使用 lines
函数:
lr.plot <- plot(roc(test1$Y,lr.probs))
gbm.plot <-lines(roc(test1$Y,gbm.probs\[,2\]), col="red")
rf.plot <-lines(roc(test1$Y,rf.probs\[,2\]), col="blue")
xgb.plot <- lines(roc(test2$Y,xgb.probs), col="green")