机器学习学习笔记(九)—— 评价学习算法的好坏
偏斜类(skewed classes)的问题:
当分类问题,0或1这样的,1占99%,0占1%,这样结果比较极端的,称为偏斜类问题。
Precision(查准率) and recall(召回率) are defined according to:
You have trained a logistic regression classifier and plan to make predictions according to:
选择FScore最高的。