What Is Machine Learning

Two definitions of Machine Learning are offered. Arthur Samuel described it as :”the field of study that gives computer the ability to learn without being explicitly programmed.” This is an older, informal definition.

Tom Mitchell provides a more modern definition: “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 game of checkers

T = the task of playing checkers

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

In general, any machine learning problem can be assigned to one of two board classification:

Supervised learning and Unsupervised learning.

机器学习