机器学习的定义和分类

1.什么是机器学习

两个定义：

the field of study that gives computers the ability to learn without being explicitly programmed."

A computer program is said to learn from experience E with respect to some class of tasks T and performance measure P, if its performance at tasks in T, as measured by P, improves with experience E

2.监督学习

给出的数据集中，给出正确答案。

分类：回归问题（连续）和分类问题（离散）。

3.无监督学习

没给出正确答案