R中的多类ROC曲线 [英] Multiclass ROC curves in R

问题描述

我对 ROC曲线的概念并不陌生.我试图通过阅读网络上的一些教程来理解它.我在python中此处找到了一个很好的例子.

I'm new to the concept of ROC curves. I've tried to understand it by reading a few tutorials on the web. I found a really good example here in python which was helpful.

我想为我构建的 multiclass 分类器绘制 ROC曲线.但是，网络上的大多数解决方案都是针对 2类问题和非多类的.

I want to plot a ROC curve for multiclass classifier that I built(in Python). However, Most of the solutions on the web are for 2 class problems and not multiclass.

但是，我终于找到了" multiclass.roc R 中的 pROC 软件包中的>"功能，可进行多类ROC曲线绘制.

However, I finally found "multiclass.roc" function in pROC package in R which does multiclass ROC curve plotting.

以下是一个简单的示例:

The following is a simple example:

library(pROC)
data(aSAH)
multiclass.roc(aSAH$gos6, aSAH$s100b)

但是，我不知道如何解释(因为我不知道R).

However, I don't understand how to interpret it (as I don't know R).

谁能指出 aSAH $ s100b 变量是什么?我可以说 aSAH $ gos6 指向 aSAH 数据集中的不同类别的数据.

Can anyone please point out what aSAH$s100b variable refers to? I can say aSAH$gos6 points to different classes of data in aSAH dataset.

推荐答案

此外，您可能希望查看 Fawcett，2006 ，该书为理解和实现ROC图提供了很好的指南.他还介绍了多类ROC和AUC，并指出了更多资源.

Additionally, you might want to look at Fawcett, 2006 for a very nice guide to understanding and implementing ROC plots. He also addresses multi-class ROC and AUC, as well as points to additional resources.

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