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2018-11-08
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摘要:本文主要向大家介绍了机器学习入门之一道关于 precision、recall 和 threshold关系的机器学习题,通过具体的内容向大家展现,希望对大家学习机器学习入门有所帮助。
本文主要向大家介绍了机器学习入门之一道关于 precision、recall 和 threshold关系的机器学习题,通过具体的内容向大家展现,希望对大家学习机器学习入门有所帮助。
Suppose you have trained a logistic regression classifier which is outputing hθ(x).
Currently, you predict 1 if hθ(x)≥threshold, and predict 0 if hθ(x)<threshold, where currently the threshold is set to 0.5.
Suppose you increase the threshold to 0.7. Which of the following are true? Check all that apply.
The classifier is likely to now have higher recall.
The classifier is likely to now have higher precision.
The classifier is likely to have unchanged precision and recall, and thus the same F1 score.
The classifier is likely to have unchanged precision and recall, but higher accuracy.
这道题变着花样做了好几遍,老是做错啊。。。
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