第一部分：入门

一、机器学习的定义

Arthur Samuel：Field of study that gives computers the ability to learn without being explicitly programmed.

计算机在没有得到明确指令的情况下进行学习并解决问题。

Tom Mitchell ： Well-posed Learning Problem: A computer program is said to learn from experience E with respect to sometask T and someperformance measure P, if its performance on T, as measured by P, improves with experience E.

计算机从经验E中进行学习，表现用指标P衡量，最终完成任务T

二、分类

1.监督学习supervised learning

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