Logistic Regression | InspirationCafe



阅读本文前,最好先阅读前一篇Linear Regression,或者已经了解了Hypothesis、Cost Function和Gradient Descent等基本概念。

What is Logistic Regression ?

前面说了用Linear Regression去解决线性拟合问题,那么当遇到下面这样的Classification问题怎么办呢?

Classification

情景是通过两次测验的成绩判断学生是否合格。

很明显,智商正常的人都知道一个简单暴力的方法就是用一条直线将其分成"楚汉两界",大致如下图所示:


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