{"id":149,"date":"2025-06-01T20:21:50","date_gmt":"2025-06-01T12:21:50","guid":{"rendered":"https:\/\/www.monitorsh.cn\/?p=149"},"modified":"2025-06-02T15:58:58","modified_gmt":"2025-06-02T07:58:58","slug":"%e6%95%b0%e5%ad%a6%e5%bb%ba%e6%a8%a1%ef%bc%9a%e5%ad%a6%e4%b9%a0%e5%86%b3%e7%ad%96%e6%a0%91-%e5%88%9d%e6%ad%a5%e5%8d%b0%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/www.monitorsh.cn\/index.php\/2025\/06\/01\/%e6%95%b0%e5%ad%a6%e5%bb%ba%e6%a8%a1%ef%bc%9a%e5%ad%a6%e4%b9%a0%e5%86%b3%e7%ad%96%e6%a0%91-%e5%88%9d%e6%ad%a5%e5%8d%b0%e8%b1%a1\/","title":{"rendered":"\u6570\u5b66\u5efa\u6a21\uff1a\u5b66\u4e60\u51b3\u7b56\u6811-\u521d\u6b65\u5370\u8c61\uff08\u4e00\uff09"},"content":{"rendered":"

\u4ec0\u4e48\u662f\u51b3\u7b56\u6811\uff1f<\/p>\n

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\"\"<\/div><\/p>\n

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\u987e\u540d\u601d\u4e49\uff0c\u51b3\u7b56\u6811\u6a21\u578b\u540d\u79f0\u7684\u7531\u6765\u5c31\u662f\u56e0\u4e3a\u5176\u548c\u4e00\u9897\u6811\u4e00\u6837\uff0c\u4ece\u5e95\u90e8\u7684\u6839\u5411\u4e0a\u751f\u957f\uff0c\u6bcf\u4e2a\u5206\u652f\u4ee3\u8868\u4e00\u4e2a\u89c4\u5219\uff0c\u6bcf\u7247\u53f6\u5b50\u8868\u793a\u4e00\u4e2a\u6700\u7ec8\u7ed3\u679c\u3002<\/p>\n

\u6b64\u5916\uff0c\u51b3\u7b56\u6811\u6a21\u578b\u662f\u6811\u72b6\u7ed3\u6784\u6a21\u578b\u7684\u603b\u79f0\uff0c\u6839\u636e\u5206\u652f\u7684\u6837\u672c\u96c6\u5408\u7eaf\u5ea6\u5ea6\u91cf\u6307\u6807\u7684\u4e0d\u540c\u5206\u4e3a\u4e0d\u540c\u7b97\u6cd5\uff0c\u5176\u4e2d\u5177\u6709\u6807\u5fd7\u6027\u7684\u662fID3\u3001C4.5\u548cCART\u3002<\/font><\/p>\n

\u51b3\u7b56\u6811\u7684\u7ed3\u6784\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

\"\"<\/div><\/p>\n

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    \n
  • \u6839\u8282\u70b9<\/strong>\uff1a\u662f\u6811\u7684\u8d77\u70b9\uff0c\u4ee3\u8868\u6574\u4e2a\u6570\u636e\u96c6\uff1b\n
      \n
    • \u51b3\u7b56\u8282\u70b9\/\u5185\u90e8\u8282\u70b9<\/strong>\uff1a\u56fe1\u4e2d\u7684\u7070\u7bee\u8272\u6846\uff0c\u6bcf\u4e2a\u7070\u84dd\u8272\u6846\u4ee3\u8868\u4e00\u6761\u51b3\u7b56\u89c4\u5219\uff0c\u6839\u636e\u8fd9\u4e2a\u89c4\u5219\u5c06\u6570\u636e\u5206\u6210\u4e0d\u540c\u90e8\u5206\uff1b\uff08\u4f8b\u5982\u6839\u636e\u89c4\u5219\u201c\u6708\u85aa\u662f\u5426\u8fbe\u523050000\u201d\u5c06\u6570\u636e\u5206\u6210\u201c\u8fbe\u5230\u201d\u548c\u201c\u6ca1\u6709\u8fbe\u5230\u201d\u4e24\u90e8\u5206\u3002<\/font>\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
        \n
      • \u53f6\u8282\u70b9<\/strong>\uff1a\u56fe1\u4e2d\u7684\u7eff\u8272\u6846\uff0c\u4ee3\u8868\u51b3\u7b56\u7ed3\u679c\uff1b<\/li>\n<\/ul>\n

        \u90a3\u4e48\u601d\u8003\u4e00\u4e2a\u95ee\u9898\uff1a\u56fe1\u4e2d3\u6761\u51b3\u7b56\u89c4\u5219\u7684\u987a\u5e8f\u5bf9\u4e8e\u51b3\u7b56\u6811\u6765\u8bf4\u8981\u600e\u4e48\u786e\u5b9a\u5462\uff1f<\/font><\/strong><\/p>\n

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        \u51b3\u7b56\u6811\u80cc\u540e\u7684\u6570\u5b66\u539f\u7406<\/font><\/strong><\/p>\n


        \n<\/font<\/p>\n

        \u8981\u8bb0\u4f4f\uff1a\u51b3\u7b56\u6811\u662f\u901a\u8fc7\u80fd\u591f\u5ea6\u91cf\u6837\u672c\u5b50\u96c6\u540c\u8d28\u7a0b\u5ea6\u7684\u6307\u6807\u6765\u786e\u5b9a\u51b3\u7b56\u89c4\u5219\u7684\u987a\u5e8f\u7684<\/font><\/strong>\uff0c\u6839\u636e\u5ea6\u91cf\u6307\u6807\u7684\u4e0d\u540c\u5bf9\u5e94\u4e0d\u540c\u51b3\u7b56\u6811\u7b97\u6cd5\u3002<\/p>\n

        \u51b3\u7b56\u6811\u6bcf\u4e2a\u51b3\u7b56\u8282\u70b9\u7684\u5212\u5206\u90fd\u4f1a\u4ea7\u751f\u4e24\u4e2a\u6216\u591a\u4e2a\u6570\u636e\u5b50\u96c6\uff0c\u6211\u4eec\u5fc5\u7136\u662f\u5e0c\u671b\u540c\u4e00\u4e2a\u5b50\u96c6\u4e2d\u7684\u6570\u636e\u201c\u7eaf\u5ea6\u201d\u6216\u8005\u8bf4\u540c\u8d28\u5ea6\u8d8a\u9ad8\u8d8a\u597d\uff0c<\/font><\/strong>\u4e0d\u540c\u5b50\u96c6\u95f4\u7684\u533a\u5206\u5ea6\u8d8a\u9ad8\u8d8a\u597d\u3002<\/p>\n

          \n
        • \u4f8b\u5982\u5bf9\u4e8e\u732b\u548c\u72d7\u7684\u6570\u636e\u5206\u7c7b\uff0c\u6211\u4eec\u7528\u201c\u53eb\u58f0\u662f\u5426\u4e3a\u6c6a\u6c6a\u6c6a\u201d\u8fd9\u4e00\u51b3\u7b56\u89c4\u5219\u5c31\u80fd\u628a\u4e24\u8005\u5b8c\u5168\u533a\u5206\u5f00\u6765\uff0c\u8fd9\u6837\u7684\u51b3\u7b56\u89c4\u5219\u6211\u4eec\u5e0c\u671b\u79bb\u6839\u8282\u70b9\u8d8a\u8fd1\u8d8a\u597d\u3002<\/font><\/strong><\/li>\n<\/ul>\n

          \u5ea6\u91cf\u6837\u672c\u96c6\u201c\u7eaf\u5ea6\u201d\u7684\u6307\u6807\u4e3b\u8981\u5305\u62ec\u57fa\u4e8e\u4fe1\u606f\u71b5\u7684\u4fe1\u606f\u589e\u76ca\u548c\u4fe1\u606f\u589e\u76ca\u7387\uff0c\u4ee5\u53ca\u57fa\u5c3c\u6307\u6570\uff0c\u57fa\u4e8e\u8fd9\u4e09\u79cd\u201c\u7eaf\u5ea6\u201d\u6307\u6807\u7684\u51b3\u7b56\u6811\u7b97\u6cd5\u5206\u522b\u4e3aID3\u3001C4.5\u548cCART\u3002<\/p>\n

            \n
          • \u4fe1\u606f\u589e\u76ca\uff08information gain\uff09<\/font><\/strong><\/li>\n<\/ul>\n

            ID3\u7b97\u6cd5<\/font><\/strong>\u662f\u6839\u636e\u57fa\u4e8e\u4fe1\u606f\u71b5\uff08information entropy\uff09\u7684\u4fe1\u606f\u589e\u76ca\u6765\u5ea6\u91cf\u6570\u636e\u5b50\u96c6\u7684\u201c\u7eaf\u5ea6\u201d\u7684\u3002<\/p>\n

            \u5047\u8bbe\u6570\u636e\u96c6\u7684\u7ed3\u5c40\u53d8\u91cf_Y_\u6709_J_\u4e2a\u7c7b\u522b

            \"\"<\/div>\uff0c\u5bf9\u4e8e\u6bcf\u4e2a\u51b3\u7b56\u8282\u70b9\uff0c\u6570\u636e\u96c6\/\u6570\u636e\u5b50\u96c6_D_\u4e2d\u6bcf\u5404\u4e2a\u7c7b\u522b\u7684\u5360\u6bd4\u4e3a
            \"\"<\/div>
            \"\"<\/div>\uff0c\u90a3\u4e48_D_\u7684\u4fe1\u606f\u71b5\u4e3a\uff1a<\/p>\n

            \"\"<\/div><\/p>\n

            Ent\uff08D\uff09<\/font>\u7684\u503c\u8d8a\u5c0f\u4ee3\u8868\u8be5\u8282\u70b9\u4e2dD\u7684\u7eaf\u5ea6\u8d8a\u9ad8\u3002<\/font><\/strong><\/font><\/p>\n

            ==\u4f8b\u5982<\/font>D<\/font><\/em>\u4e2d\u53ea\u6709\u4e00\u4e2a\u7c7b\u522b\u7684\u6570\u636e\uff0c\u90a3\u4e48<\/font>

            \"\"<\/div>\uff0c<\/font>
            \"\"<\/div>\u3002<\/font>
            \n\u5047\u8bbe\u8be5\u8282\u70b9\u7684\u51b3\u7b56\u89c4\u5219r\u6709<\/font>K<\/font><\/em>\u4e2a\u53ef\u80fd\u53d6\u503c\uff0c\u90a3\u4e48\u6570\u636e\u96c6\u5c06\u88ab\u5212\u5206\u4e3a\u5b50\u96c6<\/font>
            \"\"<\/div>\uff0c\u5212\u5206\u540e\u6240\u6709\u6570\u636e\u5b50\u96c6\u4fe1\u606f\u71b5\u7684\u52a0\u6743\u548c\u5219\u4e3a\uff1a<\/font>
            \n
            \"\"<\/div>\uff0c<\/font>
            \"\"<\/div>
            \n\u5f0f\u4e2d<\/font>
            \"\"<\/div>\u3001<\/font>
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            \n\u65e2\u7136\u6709\u4e86\u6570\u636e\u5212\u5206\u524d\u540e\u7684\u4fe1\u606f\u71b5\uff0c\u6211\u4eec\u5c31\u80fd\u591f\u5f97\u5230\u5229\u7528\u8be5\u51b3\u7b56\u89c4\u5219r\u5bf9\u6570\u636e\u96c6D\u5212\u5206\u524d\u540e\u7684\u4fe1\u606f\u71b5\u53d8\u5316\uff0c\u8fd9\u4e00\u5dee\u503c\u79f0\u4e3a\u201c\u4fe1\u606f\u589e\u76ca\u201d\uff08information gain\uff09\uff1a<\/font>
            \n
            \"\"<\/div>\uff0c<\/font>
            \n
            \"\"<\/div>\u8d8a\u5927\u5219\u610f\u5473\u7740\u7528\u89c4\u5219\u8fdb\u884c\u6570\u636e\u5212\u5206\u6240\u5e26\u6765\u7684\u4fe1\u606f\u71b5\u4e0b\u964d\u91cf\u8d8a\u5927\uff0c\u5373\u6570\u636e\u201c\u7eaf\u5ea6\u63d0\u5347\u201d\u8d8a\u5927\u3002<\/font><\/strong><\/p>\n
              \n
            • ID3\u7b97\u6cd5\u5c31\u662f\u6839\u636e\u4fe1\u606f\u589e\u76ca\u6307\u6807\u6765\u786e\u5b9a\u5177\u4f53\u51b3\u7b56\u89c4\u5219\u548c\u89c4\u5219\u987a\u5e8f\u7684\uff0c<\/font><\/strong>
              \"\"<\/div>\u8d8a\u5927\u7684\u51b3\u7b56\u89c4\u5219\u5c06\u51fa\u73b0\u5728\u8d8a\u63a5\u8fd1\u6839\u7ed3\u70b9\u7684\u4f4d\u7f6e\u3002<\/font> <\/li>\n<\/ul>\n

              \u221a\u4f46\u601d\u8003\u8fd9\u6837\u4e00\u4e2a\u95ee\u9898\uff1a<\/font><\/strong>\u5982\u679c\u628a\u201c\u6570\u636e\u7f16\u53f7\u201c\u8fd9\u4e00\u53d8\u91cf\u4f5c\u4e3a\u51b3\u7b56\u89c4\u5219\uff0c\u90a3\u4e48\u5c06\u4ea7\u751f\u548c\u6570\u636e\u6761\u6570\u76f8\u540c\u6570\u91cf\u7684\u6570\u636e\u5b50\u96c6\uff0c\u6bcf\u4e2a\u5b50\u96c6\u90fd\u53ea\u6709\u4e00\u6761\u6570\u636e\uff0c\u4e5f\u5c31\u662f\u8bf4\u7528\u8fd9\u4e00\u53d8\u91cf\u5c31\u80fd\u5b9e\u73b0\u6700\u5927\u4fe1\u606f\u589e\u76ca\uff0cGain\uff08D\uff0cr\uff09=Ent\uff08D\uff09<\/em>\u3002\u4f46**<\/strong>\u663e\u7136\u8fd9\u6837\u7684\u51b3\u7b56\u6811\u4e0d\u5177\u5907\u6cdb\u5316\u80fd\u529b\uff0c\u5bf9\u5916\u90e8\u6570\u636e\u65e0\u6cd5\u6709\u6548\u9884\u6d4b\u3002**<\/p>\n

              \u4ece\u8fd9\u4e2a\u95ee\u9898\u4e5f\u80fd\u770b\u51fa\u4fe1\u606f\u589e\u76ca\u6307\u6807\u5b58\u5728\u7684\u95ee\u9898\u4e86\u3002<\/p>\n

              \u4e8b\u5b9e\u4e0a\uff0c\u4fe1\u606f\u589e\u76ca\u6307\u6807\u504f\u597d\u4e8e\u53d6\u503c\u6570\u76ee\u8f83\u591a\u7684\u89c4\u5219\uff0c\u4e3a\u4e86\u7ea0\u6b63\u8fd9\u79cd\u504f\u597d\uff0c\u4e4b\u540e\u6709\u5b66\u8005\u5728\u4fe1\u606f\u589e\u76ca\u6307\u6807\u57fa\u7840\u4e0a\u63d0\u51fa\u4e86\u201c\u4fe1\u606f\u589e\u76ca\u7387\u201d\u3002<\/font><\/strong><\/p>\n

                \n
              • \u4fe1\u606f\u589e\u76ca\u7387\uff08information gain ratio\uff09<\/strong><\/li>\n<\/ul>\n

                C4.5\u7b97\u6cd5<\/font><\/strong>\u5c31\u662f\u6839\u636e\u4fe1\u606f\u589e\u76ca\u7387\u6765\u5ea6\u91cf\u6570\u636e\u5b50\u96c6\u7684\u201c\u7eaf\u5ea6\u201d\u7684\u3002\u4fe1\u606f\u589e\u76ca\u7387\u901a\u8fc7\u5c06\u548c\u89c4\u5219\u7684\u53d6\u503c\u6570\u76ee\u76f8\u5173\u7684\u9879\u4f5c\u4e3a\u5206\u6bcd\u6765\u60e9\u7f5a\u53d6\u503c\u6570\u76ee\u8f83\u591a\u7684\u89c4\u5219<\/font><\/strong>\uff0c\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1a<\/p>\n

                \"\"<\/div>\uff0c<\/p>\n

                \u5f0f\u4e2d<\/p>\n

                \"\"<\/div><\/p>\n

                \"\"<\/div>\u3001
                \"\"<\/div>\u5206\u522b\u8868\u793a\u7b2c_k_\u4e2a\u6570\u636e\u5b50\u96c6\u7684\u6837\u672c\u6570\u3001\u5212\u5206\u524d\u8282\u70b9\u4e2d\u7684\u6837\u672c\u6570\u3002\u89c4\u5219_r_\u7684\u53d6\u503c\u6570\u76ee\u8d8a\u591a\u5219_V\uff08r\uff09_\u7684\u503c\u5f80\u5f80\u4f1a\u8d8a\u5927\uff0c\u76f8\u5f53\u4e8e\u5bf9\u4fe1\u606f\u589e\u76ca\u7684\u60e9\u7f5a\u8d8a\u5927\u3002<\/p>\n
                  \n
                • \u57fa\u5c3c\u6307\u6570\uff08gini index\uff09<\/strong><\/li>\n<\/ul>\n

                  CART\u7b97\u6cd5<\/font><\/strong>\u662f\u6839\u636e \u201c\u57fa\u5c3c\u6307\u6570\u201d\u6765\u5ea6\u91cf\u6570\u636e\u5b50\u96c6\u7684\u201c\u7eaf\u5ea6\u201d\u7684\u3002\u91c7\u7528\u548c\u4fe1\u606f\u71b5\u8ba1\u7b97\u76f8\u540c\u7684\u7b26\u53f7\u8868\u793a\uff0c\u5bf9\u4e8e\u6bcf\u4e2a\u51b3\u7b56\u8282\u70b9\uff0c\u6570\u636e\u96c6\u7684_D_\u57fa\u5c3c\u6307\u6570\u4e3a\uff1a<\/p>\n

                  \"\"<\/div>\u3002<\/p>\n

                  \u53ef\u4ee5\u770b\u5230\uff0c_Gini\uff08D\uff09_\u7684\u76f4\u89c2\u7406\u89e3\u662f\u4ece\u8be5\u8282\u70b9\u4e0a\u968f\u673a\u9009\u53d6\u4e24\u4e2a\u6837\u672c\uff0c\u4e24\u8005\u7c7b\u522b\u4e0d\u4e00\u81f4\u7684\u6982\u7387\u3002\u56e0\u6b64G_ini\uff08D<\/strong>\uff09_\u8d8a\u5c0f\u5c31\u4ee3\u8868_D_\u7684\u7eaf\u5ea6\u8d8a\u9ad8\u3002<\/p>\n

                  \u90a3\u4e48\u5229\u7528\u51b3\u7b56\u89c4\u5219_r_\u5bf9_D_\u5212\u5206\u540e\u7684\u57fa\u5c3c\u6307\u6570\u5219\u4e3a_K_\u4e2a\u6570\u636e\u5b50\u96c6\u7684\u57fa\u5c3c\u6307\u6570\u7684\u52a0\u6743\u548c\uff1a<\/p>\n

                  \"\"<\/div>\u3002<\/p>\n

                  \u5bf9D\u5212\u5206\u540eGini\uff08_D\uff0cr\uff09_\u8d8a\u5c0f\u7684\u51b3\u7b56\u89c4\u5219r\u5c31\u8d8a\u9760\u8fd1\u6839\u8282\u70b9\u7684\u4f4d\u7f6e\u3002<\/p>\n

                  \u51b3\u7b56\u6811\u5177\u4f53\u7684\u8bad\u7ec3\u8fc7\u7a0b<\/font><\/strong><\/p>\n

                  \u5e72\u8bb2\u6570\u5b66\u539f\u7406\u6bd4\u8f83\u62bd\u8c61\uff0c\u6211\u4eec\u7528\u4e00\u4e2a\u7b80\u5355\u4f8b\u5b50\u6765\u8bb2\u89e3\u51b3\u7b56\u6811\u7684\u8bad\u7ec3\u8fc7\u7a0b\u3002<\/p>\n

                  \u4e09\u5927\u51b3\u7b56\u6811\u7b97\u6cd5\u7684\u80cc\u540e\u601d\u60f3\u90fd\u662f\u4e00\u81f4\u7684\uff0c\u53ea\u662f\u7528\u4e86\u4e0d\u540c\u7684\u6570\u636e\u7eaf\u5ea6\u8861\u91cf\u6307\u6807\uff0c\u7406\u89e3\u4e86\u5176\u4e2d\u4e00\u4e2a\u7b97\u6cd5\u4e5f\u5c31\u660e\u767d\u4e86\u51b3\u7b56\u6811\u662f\u600e\u4e48\u56de\u4e8b\u3002<\/p>\n

                  \u76f8\u6bd4ID3\u548cC4.5\u53ea\u80fd\u8fdb\u884c\u5206\u7c7b\u4efb\u52a1\uff0cCART\u8fd8\u53ef\u4ee5\u8fdb\u884c\u56de\u5f52\u4efb\u52a1\uff0c\u662f\u76ee\u524d\u6700\u4e3b\u6d41\u7684\u51b3\u7b56\u6811\u7b97\u6cd5\uff0c\u6211\u4eec\u7528CART\u51b3\u7b56\u6811\u7684\u6784\u5efa\u4f5c\u4e3a\u793a\u4f8b\u3002<\/font><\/strong><\/p>\n

                  \u6211\u4eec\u770b\u4e0b\u8868\u6570\u636e\u96c6\uff0c\u6570\u636e\u96c6\u5305\u62ec\u4e8615\u5929\u7684\u73af\u5883\uff08weather\u3001temperature\u3001humidity\u3001windy\uff09<\/font>\u548c\u51fa\u53bb\u73a9\uff08outside\uff09<\/font>\u7684\u60c5\u51b5\uff0c\u6211\u4eec\u6784\u5efaCART\u51b3\u7b56\u6811\u6a21\u578b\u6765\u6839\u636e\u73af\u5883\u56e0\u7d20\u9884\u6d4b\u662f\u5426\u51fa\u53bb\u73a9\u3002<\/p>\n

                  \"\"<\/div><\/p>\n
                    \n
                  • \u9996\u5148\u786e\u5b9a\u7b2c\u4e00\u5c42\u7684\u51b3\u7b56\u8282\u70b9<\/font><\/strong><\/li>\n<\/ul>\n

                    \u4e3a\u4e86\u786e\u5b9a\u7b2c\u4e00\u5c42\u51b3\u7b56\u8282\u70b9\uff0c\u9700\u8981\u8ba1\u7b97\u6240\u6709\u73af\u5883\u53d8\u91cf\u5404\u5c5e\u6027\u7684\u57fa\u5c3c\u6307\u6570\u3002<\/p>\n

                    \u9996\u5148\u770bweather\uff08\u5929\u6c14\uff09<\/font>\u53d8\u91cf\uff0c\u4e3a\u65b9\u4fbf\u540e\u7eed\u8ba1\u7b97\uff0c\u6211\u4eec\u5148\u628a\u8be5\u53d8\u91cf3\u4e2a\u5c5e\u6027\u5bf9\u5e94\u7684outside\uff08\u51fa\u53bb\u73a9\uff09<\/font>\u60c5\u51b5\u5217\u51fa\u6765\u3002<\/p>\n

                    \"\"<\/div><\/p>\n

                    \u7531\u4e8eCART\u662f\u4e8c\u53c9\u6811\u7ed3\u6784\uff0c\u5f53\u53d8\u91cf\u6709\u591a\u4e2a\u5c5e\u6027\u65f6\u9700\u8981\u5408\u5e76\u62102\u4e2a\uff0c\u56e0\u6b64weather\u53d8\u91cf\u7684\u5c5e\u6027\u5171\u67093\u79cd\u7ec4\u5408\u3002<\/p>\n

                    \u7b2c\u4e00\u79cd\u7ec4\u5408\uff1a<\/strong> sunny\u3001cloudy\u548crainy<\/p>\n

                    \"\"<\/div><\/p>\n

                    \"\"<\/div><\/p>\n

                    \u7ec4\u5408\u4e00\u7684\u57fa\u5c3c\u6307\u6570\u4e3a\uff1a<\/p>\n

                    \"\"<\/div>\u3002<\/p>\n

                    \u7b2c\u4e8c\u79cd\u7ec4\u5408\uff1a<\/strong> cloudy\u3001sunny\u548crainy<\/p>\n

                    \"\"<\/div><\/p>\n

                    \"\"<\/div><\/p>\n

                    \u7ec4\u5408\u4e8c\u7684\u57fa\u5c3c\u6307\u6570\u4e3a\uff1a<\/p>\n

                    \"\"<\/div>\u3002<\/p>\n

                    \u7b2c\u4e09\u79cd\u7ec4\u5408\uff1a<\/strong> rainy\u3001sunny\u548ccloudy<\/p>\n

                    \"\"<\/div><\/p>\n

                    \"\"<\/div><\/p>\n

                    \u7ec4\u5408\u4e09\u7684\u57fa\u5c3c\u6307\u6570\u4e3a\uff1a<\/p>\n

                    \"\"<\/div>\u3002<\/p>\n

                    \u6309\u7167\u8fd9\u79cd\u65b9\u5f0f\u8ba1\u7b97\u6240\u6709\u73af\u5883\u53d8\u91cf\u5404\u5c5e\u6027\u7684\u57fa\u5c3c\u6307\u6570\uff0c\u5f97\u5230\uff1a<\/p>\n

                    \"\"<\/div><\/p>\n

                    weather\u53d8\u91cf\u7b2c2\u4e2a\u5c5e\u6027\u7ec4\u5408\u7684\u57fa\u5c3c\u6307\u6570\u6700\u5c0f\uff0c\u6545\u4ee5\u5176\u4f5c\u4e3a\u7b2c\u4e00\u5c42\u7684\u51b3\u7b56\u8282\u70b9\uff0c\u7ecf\u8fc7\u8be5\u8282\u70b9\u540e\u6570\u636e\u96c6_D_\u88ab\u5206\u6210\u4e09\u4e2a\u5b50\u96c6D<\/em>1<\/em><\/sub>\u3001D<\/em>2<\/em><\/sub>\u548cD<\/em>3<\/em><\/sub>\uff0c\u5982\u4e0b\u56fe\u3002<\/p>\n

                    \"\"<\/div><\/p>\n

                    D<\/em>1<\/em><\/sub>\u7684outside\u5df2\u7ecf\u5168\u90fd\u662fyes\u4e86\uff0c\u5373_Gini\uff08_D<\/em>1<\/em><\/sub>\uff09=0<\/em>\uff0c\u4e0d\u518d\u5bf9D<\/em>1<\/em><\/sub>\u5efa\u7acb\u4e0b\u4e00\u5c42\u51b3\u7b56\u8282\u70b9\u3002\u4f46D<\/em>2<\/em><\/sub>\u548cD<\/em>3<\/em><\/sub>\u4e2doutside\u5e76\u4e0d\u90fd\u662f\u540c\u4e00\u7c7b\u522b\uff0c\u53ef\u4ee5\u8fdb\u4e00\u6b65\u5212\u5206\u3002<\/p>\n

                      \n
                    • \u4e4b\u540e\u4ee5\u76f8\u540c\u65b9\u5f0f\u786e\u5b9a\u540e\u9762\u5c42\u7684\u51b3\u7b56\u8282\u70b9<\/font><\/strong><\/li>\n<\/ul>\n

                      \u5148\u770b\u6570\u636e\u96c6D<\/em>2<\/em><\/sub>\uff0c<\/p>\n

                      \"\"<\/div><\/p>\n

                      \u548c_D_\u4e2d\u786e\u5b9a\u51b3\u7b56\u8282\u70b9\u4e00\u6837\uff0c\u9488\u5bf9D<\/em>2<\/em><\/sub>\u8ba1\u7b97temperature\u3001humidity\u548cwindy\u53d8\u91cf\u5404\u5c5e\u6027\u7684\u57fa\u5c3c\u6307\u6570\u4e3a\uff1a<\/p>\n

                      \"\"<\/div><\/p>\n

                      humidity\u7684\u57fa\u5c3c\u6307\u6570\u6700\u5c0f\uff0c\u6545\u4ee5\u5176\u4f5c\u4e3aD<\/em>2<\/em><\/sub>\u7684\u51b3\u7b56\u8282\u70b9\u3002\u7ecfhumidity\u5212\u5206\u540e\u7684\u6570\u636e\u5b50\u96c6\u7684outside\u90fd\u4e3a\u540c\u4e00\u7c7b\uff0c\u505c\u6b62\u8fdb\u4e00\u6b65\u5212\u5206\u3002<\/p>\n

                      \u5bf9\u4e8e\u6570\u636e\u96c6D<\/em>3<\/em><\/sub>\uff0c<\/p>\n

                      \"\"<\/div><\/p>\n

                      \u8ba1\u7b97temperature\u3001humidity\u548cwindy\u53d8\u91cf\u5404\u5c5e\u6027\u7684\u57fa\u5c3c\u6307\u6570\u4e3a\uff1a<\/p>\n

                      \"\"<\/div><\/p>\n

                      temperature\u548cwindy\u7684\u57fa\u5c3c\u6307\u6570\u4e00\u6837\u5c0f\uff0c\u4efb\u9009\u5176\u4e2d\u4e00\u4e2a\u4f5c\u4e3aD<\/em>3<\/em><\/sub>\u7684\u51b3\u7b56\u8282\u70b9\u3002<\/p>\n

                      \u8fd9\u91cc\u9009\u62e9temperature\u5212\u5206D<\/em>3<\/em><\/sub>\uff0c\u5212\u5206\u540e\u5c5e\u6027\u4e3amild\u7684\u6570\u636e\u7684outside\u5168\u90e8\u4e3ayes\uff0c\u5c5e\u6027\u4e3acool\u7684\u6570\u636e\u7684outside\u4e00\u4e2a\u4e3ayes\u53e6\u4e00\u4e2a\u4e3ano\u3002<\/p>\n

                      \u7136\u800c\u7531\u4e8e\u65e0\u6cd5\u901a\u8fc7humidity\u53d8\u91cf\u8fdb\u4e00\u6b65\u5212\u5206\uff0c\u53ea\u80fd\u4efb\u9009yes\u6216no\u4e4b\u4e00\u4f5c\u4e3a\u5224\u5b9a\u7ed3\u679c\uff0c\u6211\u4eec\u8fd9\u91cc\u9009\u62e9no\u3002<\/p>\n

                      CART\u51b3\u7b56\u6811\u6a21\u578b\u6700\u7ec8\u6784\u5efa\u5982\u4e0b<\/p>\n

                      \"\"<\/div><\/p>\n

                      \u6709\u4e86\u8fd9\u4e00\u6a21\u578b\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5229\u7528\u5929\u6c14\u9884\u62a5\u6570\u636e\u9884\u5224\u660e\u5929\u51fa\u4e0d\u51fa\u53bb\u73a9\u4e86\u3002<\/font><\/strong><\/p>\n

                      \u6b64\u5916\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u5728\u8bad\u7ec3\u51b3\u7b56\u6811\u8fc7\u7a0b\u4e2d\uff0c\u4e3a\u4e86\u5c3d\u53ef\u80fd\u5c06\u66f4\u591a\u6837\u672c\u6b63\u786e\u5206\u7c7b\uff0c\u53ef\u80fd\u4f1a\u5c06\u6837\u672c\u6570\u5df2\u7ecf\u5f88\u5c0f\u7684\u6570\u636e\u5b50\u96c6\u8fdb\u4e00\u6b65\u7ec6\u5206\u3002<\/p>\n

                      \u8fd9\u4f1a\u4f7f\u5f97\u51b3\u7b56\u6811\u5206\u652f\u6570\u8fc7\u591a\uff0c\u4ee5\u81f4\u4e8e\u5c06\u90e8\u5206\u6570\u636e\u7684\u4e00\u4e9b\u7279\u6027\u5f53\u4f5c\u6240\u6709\u6570\u636e\u7684\u666e\u904d\u5c5e\u6027\uff0c<\/font>\u5bfc\u81f4\u6a21\u578b\u5bf9\u5916\u90e8\u6570\u636e\u7684\u9884\u6d4b\u6548\u679c\u4e0d\u597d\u2014\u2014\u8fd9\u79cd\u73b0\u8c61\u79f0\u4e3a\u201c\u8fc7\u62df\u5408\u201d\u3002<\/strong><\/p>\n

                      \u4e3a\u4e86\u964d\u4f4e\u51b3\u7b56\u6811\u7684\u8fc7\u62df\u5408\u98ce\u9669\uff0c\u53ef\u4ee5\u4e3b\u52a8\u53bb\u6389\u4e00\u4e9b\u5206\u652f\uff0c\u8be5\u6280\u672f\u79f0\u4e3a\u526a\u679d\uff08pruning\uff09<\/font>\u3002<\/p>\n

                      \"\"<\/div><\/p>\n

                      \u526a\u679d\u548c\u65e5\u5e38\u6811\u6728\u4fee\u526a\u662f\u4e00\u4e2a\u9053\u7406\uff0c\u5305\u62ec\u4e24\u79cd\u7b56\u7565\uff1a<\/p>\n

                        \n
                      • \u9884\u526a\u679d\uff1a<\/strong> \u5728\u51b3\u7b56\u6811\u751f\u6210\u524d\u505a\u67d0\u4e9b\u9650\u5236\uff0c\u4f8b\u5982\u9650\u5236\u6700\u5927\u5206\u652f\u6570\u3001\u9650\u5236\u53f6\u8282\u70b9\u6700\u5c0f\u6837\u672c\u6570\uff0c\u4e0d\u8ba9\u6811\u751f\u6210\u592a\u591a\u5206\u652f\uff1b<\/li>\n
                      • \u540e\u526a\u679d\uff1a<\/strong> \u5728\u51b3\u7b56\u6811\u5b8c\u5168\u751f\u6210\u540e\uff0c\u6839\u636e\u4ea4\u53c9\u9a8c\u8bc1\u7b49\u65b9\u5f0f\u526a\u6389\u5bf9\u6cdb\u5316\u6027\u6ca1\u6709\u5e2e\u52a9\u7684\u5206\u652f\u3002<\/li>\n<\/ul>\n

                        \u51b3\u7b56\u6811\u7684\u4f18\u7f3a\u70b9<\/font><\/strong><\/p>\n


                        \n<\/font><\/p>\n

                        \u4f18\u70b9<\/font><\/strong><\/p>\n

                          \n
                        • \u6a21\u578b\u7ed3\u6784\u7b80\u5355\u76f4\u89c2\uff0c\u9884\u6d4b\u7ed3\u679c\u6613\u7406\u89e3\uff1a<\/strong> \u51b3\u7b56\u6811\u7684\u7ed3\u6784\u7528\u4e00\u5f20\u56fe\u5c31\u80fd\u8868\u793a\u51fa\u6765\u5e76\u4e14\u51b3\u7b56\u89c4\u5219\u660e\u786e\uff0c\u5f88\u5bb9\u6613\u7ed9\u4e0d\u4e86\u89e3\u51b3\u7b56\u6811\u7684\u4eba\u89e3\u91ca\u9884\u6d4b\u7ed3\u679c\u662f\u600e\u4e48\u5f97\u5230\u7684\uff1b<\/li>\n
                        • \u4e0d\u9700\u8981\u592a\u591a\u6570\u636e\u9884\u5904\u7406\uff1a<\/strong> \u51b3\u7b56\u6811\u80fd\u5bb9\u5fcd\u6570\u636e\u4e2d\u5b58\u5728\u7f3a\u5931\u503c\uff0c\u5e76\u4e14\u65e0\u9700\u50cf\u5e94\u7528\u7ebf\u6027\u56de\u5f52\u6a21\u578b\u65f6\u90a3\u6837\u5bf9\u6570\u636e\u8fdb\u884c\u5f52\u4e00\u5316\u5904\u7406\uff1b<\/li>\n
                        • \u65e0\u9700\u4eba\u4e3a\u6307\u5b9a\u6a21\u578b\u5177\u4f53\u5f62\u5f0f\uff1a<\/strong> \u4f5c\u4e3a\u673a\u5668\u5b66\u4e60\u65b9\u6cd5\u4e2d\u7684\u4e00\u79cd\uff0c\u51b3\u7b56\u6811\u65e0\u9700\u5047\u8bbe\u6570\u636e\u5206\u5e03\uff0c\u5e76\u4e14\u5177\u6709\u673a\u5668\u5b66\u4e60\u65b9\u6cd5\u5171\u6709\u7684\u80fd\u591f\u81ea\u52a8\u6355\u6349\u56e0\u53d8\u91cf\u4e0e\u81ea\u53d8\u91cf\u4e4b\u95f4\u590d\u6742\u7684\u975e\u7ebf\u6027\u5173\u7cfb\u7684\u80fd\u529b\u3002<\/li>\n<\/ul>\n

                          \u7f3a\u70b9<\/font><\/strong><\/p>\n

                            \n
                          • \u5bb9\u6613\u8fc7\u62df\u5408\uff1a<\/strong> \u4f8b\u5982\u5728\u7279\u5f81\u6570\u8f83\u591a\u65f6\uff0c\u5982\u679c\u4e0d\u8fdb\u884c\u9002\u5f53\u7684\u526a\u679d\uff0c\u51b3\u7b56\u6811\u53ef\u80fd\u4f1a\u8fc7\u5ea6\u751f\u957f\uff0c\u5bf9\u8bad\u7ec3\u6570\u636e\u8fc7\u5ea6\u62df\u5408\uff0c\u5bfc\u81f4\u6cdb\u5316\u80fd\u529b\u5dee\uff1b<\/li>\n
                          • \u6a21\u578b\u7ed3\u6784\u4e0d\u7a33\u5b9a\uff1a<\/strong> \u51b3\u7b56\u6811\u5bf9\u6570\u636e\u96c6\u4e2d\u7684\u5f02\u5e38\u503c\u548c\u566a\u58f0\u6bd4\u8f83\u654f\u611f\uff0c\u6a21\u578b\u7ed3\u6784\u53ef\u80fd\u4f1a\u56e0\u6570\u636e\u96c6\u5c0f\u7684\u53d8\u52a8\u800c\u53d1\u751f\u5f88\u5927\u53d8\u5316\uff1b<\/li>\n
                          • \u504f\u597d\u4e8e\u53d6\u503c\u6570\u76ee\u591a\u7684\u7279\u5f81\uff1a<\/strong> ID3\u548cCART\u7b97\u6cd5\u90fd\u5bb9\u6613\u5c06\u53d6\u503c\u6570\u76ee\u591a\u7684\u7279\u5f81\u653e\u5230\u9760\u8fd1\u6839\u8282\u70b9\u7684\u4f4d\u7f6e\uff0c\u6570\u636e\u5212\u5206\u53ef\u80fd\u4f1a\u8fc7\u5ea6\u4f9d\u8d56\u8fd9\u4e9b\u53d8\u91cf\u3002<\/li>\n<\/ul>\n

                            \u8bbe\u7f6eLaTeX\u6e32\u67d3\u6c38\u8fdc\u662f\u7b2c\u4e00\u4ef6\u4e8b\u60c5<\/h3>\n
                            import matplotlib.pyplot as plt\n# \u542f\u7528LaTeX\u6587\u672c\u6e32\u67d3\nplt.rcParams.update({\n    "text.usetex": True,\n    "font.family": "serif",\n    "font.serif": ["Computer Modern Roman"],\n})<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
                            \u4ec0\u4e48\u662f\u51b3\u7b56\u6811\uff1f \u51b3\u7b56\u6811\u6709\u54ea\u4e9b\u4f18\u70b9\uff1f \u51b3\u7b56\u6811\uff08Decision Tree\uff09\u662f\u4e00\u7c7b\u7ecf\u5178\u7684\u673a\u5668\u5b66\u4e60\u76d1\u7763\u6a21\u578b\uff0c\u88ab\u5e7f\u6cdb\u7528 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[10],"class_list":["post-149","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-10"],"_links":{"self":[{"href":"https:\/\/www.monitorsh.cn\/index.php\/wp-json\/wp\/v2\/posts\/149","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.monitorsh.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.monitorsh.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.monitorsh.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.monitorsh.cn\/index.php\/wp-json\/wp\/v2\/comments?post=149"}],"version-history":[{"count":3,"href":"https:\/\/www.monitorsh.cn\/index.php\/wp-json\/wp\/v2\/posts\/149\/revisions"}],"predecessor-version":[{"id":153,"href":"https:\/\/www.monitorsh.cn\/index.php\/wp-json\/wp\/v2\/posts\/149\/revisions\/153"}],"wp:attachment":[{"href":"https:\/\/www.monitorsh.cn\/index.php\/wp-json\/wp\/v2\/media?parent=149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.monitorsh.cn\/index.php\/wp-json\/wp\/v2\/categories?post=149"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.monitorsh.cn\/index.php\/wp-json\/wp\/v2\/tags?post=149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}