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旅人祈愿 · 2018年10月30日

receiver operating characteristic


According to the video, the ideal ROC is the y axis

But I think it should be 无限拟合y轴以及y=1那条线的曲线


Please double check with the instructor. 






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已采纳答案

旅人祈愿 · 2018年10月31日

Firstly, thanks for answering all my other shitty questions lol. But I'm not convinced about this one. Firstly, the way we measure the "accuracy" is the area below. If it is the y axis (0


On the other hand, if the ideal line is 无限拟合y轴以及y=1那条线的曲线. x will not be extremely closer to zero unless y is extremely closer to 1. The only problematic points may be (0,0) and (1,1), because these 2 points will not be tangible. 

I'm not ZhuangBi for using English. It's just this computer is not able to type Chinese. And btw, I did some research before I came up to this result, and I'm pretty confident about that. If you are convinced, please check with the instructor. 


Thank you :)


品职答疑小助手雍 · 2018年10月31日

能发我下那个research的链接么~?我们结合着讨论一下

旅人祈愿 · 2018年11月01日

Do u have VPN? The video was on Youtube lol. https://www.youtube.com/watch?v=J9l8J1MeCbY

品职答疑小助手雍 · 2018年11月02日

这视频解释OK的,把这个方法的理念理解了就好。

品职答疑小助手雍 · 2018年10月30日

同学你好,y=1那条线有一个问题,就是它会不断出现false alarm,举个极端栗子:总共100个公司贷款,我把所有公司全部归为bad firm,全都不贷款,Y=1,但是X可以取所有值。

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