homework/Day_054_HW.ipynb

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    "# 作業\n",
    "* 試著想想看, 非監督學習是否有可能使用評價函數 (Metric) 來鑑別好壞呢?  \n",
    "(Hint : 可以分為 \"有目標值\" 與 \"無目標值\" 兩個方向思考)"
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    "非監督學習的輸出結果好壞比較主觀，較不容易用評價函數來鑑別。\n",
    "\n",
    "在有目標值的情形下，透過分群的話有大略的好壞衡量標準；但在無目標值的情形下，判別結果的好壞則會是一個很大的問題。"
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