1.2 機器學習應用
通用人工智能(Artificial General Intelligence, AGI)
擁有和人類一樣智能的人工智能
2.1 機器學習定義
Supervised learning(監(jiān)督學習)
used most in real-world applications
Unsupervised learning(無監(jiān)督學習)
2.2 監(jiān)督學習
常見的監(jiān)督學習：學習x到y(tǒng)或輸入到輸出映射的算法
key characteristic: ==you give your learning algorithm examples to learn from.==
Learns from being given "right answers": the correct label y for a given input x, and is by seeing correct pairs of input x and desired output label y that the learning algorithm eventually learns to take just the input alone without the output label and gives a reasonably accurate prediction or guess of the output.
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Regression(回歸)
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Classification(分類)
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回歸會預測無限多的可能數字，分類只會輸出固定的類別，這些類別可以是非數字的
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