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機器學習(介紹)

機器學習(介紹)

"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."

Example: playing checkers.

E = the experience of playing many games of checkers

T = the task of playing checkers.

P = the probability that the program will win the next game.

機器學習就是從經驗E中學習,完成任務T,P是完成效果

監督學習

有標籤

1、線性迴歸

2、分類

無監督學習

無標籤

1、盲目分類

 

模型描述

用訓練集通過學習演算法,得到一個假設函式,輸入x預測y

假設函式:hθ(x)=θ0+θ1x