{"id":395,"date":"2024-10-05T11:41:01","date_gmt":"2024-10-05T03:41:01","guid":{"rendered":"https:\/\/www.xuzhe.tj.cn\/?p=395"},"modified":"2025-05-03T00:43:57","modified_gmt":"2025-05-02T16:43:57","slug":"%e5%86%b3%e7%ad%96%e6%a0%91%e5%a6%82%e4%bd%95%e6%9c%89%e6%95%88%e5%a4%84%e7%90%86%e5%88%86%e7%b1%bb%e5%8f%98%e9%87%8f-%e7%90%86%e8%ae%ba%e3%80%81%e5%ae%9e%e8%b7%b5%e4%b8%8e%e5%bb%ba%e8%ae%ae","status":"publish","type":"post","link":"https:\/\/www.xuzhe.tj.cn\/index.php\/2024\/10\/05\/%e5%86%b3%e7%ad%96%e6%a0%91%e5%a6%82%e4%bd%95%e6%9c%89%e6%95%88%e5%a4%84%e7%90%86%e5%88%86%e7%b1%bb%e5%8f%98%e9%87%8f-%e7%90%86%e8%ae%ba%e3%80%81%e5%ae%9e%e8%b7%b5%e4%b8%8e%e5%bb%ba%e8%ae%ae\/","title":{"rendered":"\u51b3\u7b56\u6811\u5982\u4f55\u6709\u6548\u5904\u7406\u5206\u7c7b\u53d8\u91cf | \u7406\u8bba\u3001\u5b9e\u8df5\u4e0e\u5efa\u8bae"},"content":{"rendered":"\n<p>\u5206\u7c7b\u53d8\u91cf\u662f\u6307\u53d6\u503c\u5c5e\u4e8e\u6709\u9650\u3001\u901a\u5e38\u662f\u975e\u6570\u503c\u7c7b\u522b\u7684\u53d8\u91cf\u3002\u5728\u6570\u636e\u5206\u6790\u548c\u673a\u5668\u5b66\u4e60\u4e2d\uff0c\u5206\u7c7b\u53d8\u91cf\u5e7f\u6cdb\u5b58\u5728\uff0c\u5982\u6027\u522b\uff08\u7537\u6027\u3001\u5973\u6027\u3001\u5176\u4ed6\uff09\u3001\u989c\u8272\uff08\u7ea2\u8272\u3001\u84dd\u8272\u3001\u7eff\u8272\u7b49\uff09\u3001\u6559\u80b2\u6c34\u5e73\uff08\u9ad8\u4e2d\u3001\u672c\u79d1\u3001\u7814\u7a76\u751f\u7b49\uff09\u3002\u7531\u4e8e\u5927\u591a\u6570\u673a\u5668\u5b66\u4e60\u7b97\u6cd5\u65e0\u6cd5\u76f4\u63a5\u5904\u7406\u975e\u6570\u503c\u6570\u636e\uff0c\u56e0\u6b64\u9700\u8981\u5bf9\u5206\u7c7b\u53d8\u91cf\u8fdb\u884c\u7279\u6b8a\u5904\u7406\uff0c\u5c06\u5176\u8f6c\u6362\u4e3a\u7b97\u6cd5\u53ef\u63a5\u53d7\u7684\u6570\u503c\u5f62\u5f0f\u3002<\/p>\n\n<!--more-->\n\n<p>\u51b3\u7b56\u6811\u662f\u4e00\u79cd\u5e38\u7528\u7684\u673a\u5668\u5b66\u4e60\u7b97\u6cd5\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5206\u7c7b\u548c\u56de\u5f52\u4efb\u52a1\u3002\u5728\u5904\u7406\u5206\u7c7b\u53d8\u91cf\u65f6\uff0c\u51b3\u7b56\u6811\u5177\u6709\u72ec\u7279\u7684\u4f18\u52bf\u548c\u65b9\u6cd5\u3002\u7136\u800c\uff0c\u4e0d\u540c\u7684\u5b9e\u73b0\u65b9\u5f0f\u5bf9\u6a21\u578b\u7684\u6027\u80fd\u548c\u8ba1\u7b97\u6548\u7387\u6709\u7740\u4e0d\u540c\u7684\u5f71\u54cd\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u51b3\u7b56\u6811\u7b97\u6cd5\u5728\u5904\u7406\u5206\u7c7b\u53d8\u91cf\u65f6\u7684\u7406\u8bba\u57fa\u7840\u3001\u5b9e\u9645\u5e94\u7528\uff0c\u4ee5\u53ca\u9488\u5bf9\u4e0d\u540c\u60c5\u51b5\u7684\u5904\u7406\u5efa\u8bae\u3002<\/p>\n\n\n<p>\u4e00\u3001\u7406\u8bba\u57fa\u7840\uff1a\u51b3\u7b56\u6811\u7b97\u6cd5\u5982\u4f55\u5904\u7406\u5206\u7c7b\u53d8\u91cf<\/p>\n\n\n<p>\u51b3\u7b56\u6811\u7b97\u6cd5\u5728\u5904\u7406\u5206\u7c7b\u53d8\u91cf\u65f6\uff0c\u91c7\u7528\u4e86\u4e00\u79cd\u5168\u9762\u800c\u9ad8\u6548\u7684\u65b9\u6cd5\u3002\u5b83\u4e0d\u4ec5\u4ec5\u5c06\u6bcf\u4e2a\u7c7b\u522b\u89c6\u4e3a\u72ec\u7acb\u7684\u7279\u5f81\uff0c\u800c\u662f\u901a\u8fc7\u8bc4\u4f30\u6240\u6709\u53ef\u80fd\u7684\u4e8c\u5143\u5212\u5206\u7ec4\u5408\uff0c\u5bfb\u627e\u6700\u4f18\u7684\u7c7b\u522b\u5212\u5206\u65b9\u5f0f\u3002\u8fd9\u79cd\u65b9\u6cd5\u5141\u8bb8\u51b3\u7b56\u6811\u5728\u6bcf\u4e2a\u8282\u70b9\u62c6\u5206\u65f6\uff0c\u5145\u5206\u8003\u8651\u7c7b\u522b\u4e4b\u95f4\u7684\u6f5c\u5728\u5173\u7cfb\u548c\u76f8\u4e92\u4f5c\u7528\uff0c\u4ece\u800c\u6355\u6349\u5230\u6570\u636e\u4e2d\u590d\u6742\u7684\u6a21\u5f0f\u548c\u975e\u7ebf\u6027\u5173\u7cfb\u3002<\/p>\n\n\n<p>\u4e3e\u4f8b\u8bf4\u660e\uff1a<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2024\/10\/%E6%BC%94%E7%A4%BA%E6%96%87%E7%A8%BF1_02.png\" class=\"wp-image-394\" \/><\/figure><\/div>\n\n\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u7528\u4e8e\u9884\u6d4b\u5ba2\u6237\u662f\u5426\u4f1a\u8d2d\u4e70\u67d0\u4ea7\u54c1\u7684\u51b3\u7b56\u6811\u6a21\u578b\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u5206\u7c7b\u53d8\u91cf\u201c\u804c\u4e1a\u201d\uff0c\u5176\u7c7b\u522b\u5305\u62ec\uff1a\u5b66\u751f\u3001\u5de5\u7a0b\u5e08\u3001\u6559\u5e08\u3001\u533b\u751f\u548c\u5176\u4ed6\u3002<\/p>\n\n\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u51b3\u7b56\u6811\u7b97\u6cd5\u4f1a\u8003\u8651\u6240\u6709\u53ef\u80fd\u7684\u804c\u4e1a\u7ec4\u5408\u6765\u8fdb\u884c\u5212\u5206\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n<pre class=\"wp-block-code\"><code>{\u5b66\u751f} vs {\u5de5\u7a0b\u5e08, \u6559\u5e08, \u533b\u751f, \u5176\u4ed6}\n{\u5b66\u751f, \u5de5\u7a0b\u5e08} vs {\u6559\u5e08, \u533b\u751f, \u5176\u4ed6}\n{\u5b66\u751f, \u6559\u5e08} vs {\u5de5\u7a0b\u5e08, \u533b\u751f, \u5176\u4ed6}\n<\/code><\/pre>\n\n\n<p>\u4ee5\u6b64\u7c7b\u63a8\uff0c\u5171\u6709 \\( (2^n &#8211; 2) \/ 2\\)\u79cd\u53ef\u80fd\u7684\u5212\u5206\u65b9\u5f0f\uff0c\u5176\u4e2d \\(n\\) \u662f\u7c7b\u522b\u6570\u91cf\u3002<\/p>\n\n\n<p>\u51b3\u7b56\u6811\u4f1a\u8ba1\u7b97\u6bcf\u79cd\u5212\u5206\u65b9\u5f0f\u7684\u4fe1\u606f\u589e\u76ca\u6216\u57fa\u5c3c\u4e0d\u7eaf\u5ea6\uff0c\u9009\u62e9\u6700\u4f18\u7684\u5212\u5206\u3002\u8fd9\u79cd\u65b9\u6cd5\u80fd\u591f\u6355\u6349\u5230\u53ef\u80fd\u5b58\u5728\u7684\u590d\u6742\u5173\u7cfb\uff0c\u4f8b\u5982\u201c\u5b66\u751f\u548c\u5de5\u7a0b\u5e08\u201d\u8fd9\u4e00\u7ec4\u5408\u53ef\u80fd\u6bd4\u5176\u4ed6\u804c\u4e1a\u66f4\u503e\u5411\u4e8e\u8d2d\u4e70\u8be5\u4ea7\u54c1\u3002<\/p>\n\n\n<p>\u4e8c\u3001\u5b9e\u9645\u5e94\u7528\uff1ascikit-learn\u4e2d\u51b3\u7b56\u6811\u7684\u5904\u7406\u65b9\u5f0f<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2024\/10\/%E6%BC%94%E7%A4%BA%E6%96%87%E7%A8%BF1_03.png\" class=\"wp-image-393\" \/><\/figure><\/div>\n\n\n<p>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0cPython\u8bed\u8a00\u56e0\u5176\u4e30\u5bcc\u7684\u751f\u6001\u7cfb\u7edf\u800c\u88ab\u5e7f\u6cdb\u7528\u4e8e\u673a\u5668\u5b66\u4e60\u3002scikit-learn \u662f\u5176\u4e2d\u4e00\u4e2a\u6d41\u884c\u7684\u673a\u5668\u5b66\u4e60\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u591a\u79cd\u51b3\u7b56\u6811\u7b97\u6cd5\u7684\u5b9e\u73b0\uff0c\u5305\u62ec\uff1a<\/p>\n\n\n<ul class=\"wp-block-list\">\n    <li>DecisionTreeClassifier\uff1a\u7528\u4e8e\u5206\u7c7b\u4efb\u52a1\u7684\u51b3\u7b56\u6811\uff0c\u57fa\u4e8e CART\uff08Classification and Regression Trees\uff09\u7b97\u6cd5\u3002<\/li>\n    <li>DecisionTreeRegressor\uff1a\u7528\u4e8e\u56de\u5f52\u4efb\u52a1\u7684\u51b3\u7b56\u6811\uff0c\u540c\u6837\u57fa\u4e8e CART \u7b97\u6cd5\u3002<\/li>\n    <li>ExtraTreeClassifier\uff1a\u6781\u7aef\u968f\u673a\u6811\u5206\u7c7b\u5668\uff0c\u57fa\u4e8e Extra Trees \u7b97\u6cd5\u3002<\/li>\n    <li>ExtraTreeRegressor\uff1a\u6781\u7aef\u968f\u673a\u6811\u56de\u5f52\u5668\uff0c\u57fa\u4e8e Extra Trees \u7b97\u6cd5\u3002<br><\/li>\n<\/ul>\n\n\n<p>CART\u7b97\u6cd5\uff1a<\/p>\n\n\n<ul class=\"wp-block-list\">\n    <li>CART \u7b97\u6cd5\u7528\u4e8e\u6784\u5efa\u4e8c\u53c9\u51b3\u7b56\u6811\uff0c\u53ef\u7528\u4e8e\u5206\u7c7b\u548c\u56de\u5f52\u4efb\u52a1\u3002<\/li>\n    <li>\u5728\u6bcf\u4e2a\u8282\u70b9\uff0c\u7b97\u6cd5\u901a\u8fc7\u904d\u5386\u6240\u6709\u7279\u5f81\u548c\u53ef\u80fd\u7684\u5207\u5206\u70b9\uff0c\u9009\u62e9\u80fd\u6700\u5927\u5316\u4fe1\u606f\u589e\u76ca\uff08\u5206\u7c7b\uff09\u6216\u6700\u5c0f\u5316\u5747\u65b9\u8bef\u5dee\uff08\u56de\u5f52\uff09\u7684\u5206\u5272\u3002<\/li>\n    <li>CART \u51b3\u7b56\u6811\u53ea\u80fd\u4ea7\u751f\u4e8c\u5143\u5206\u5272\uff0c\u5373\u6bcf\u6b21\u53ea\u80fd\u5c06\u6570\u636e\u96c6\u5212\u5206\u4e3a\u4e24\u4e2a\u5b50\u96c6\u3002<br><\/li>\n<\/ul>\n\n\n<p>Extra Trees\u7b97\u6cd5\uff1a<\/p>\n\n\n<ul class=\"wp-block-list\">\n    <li>Extra Trees \u662f\u968f\u673a\u68ee\u6797\u7684\u53d8\u4f53\uff0c\u901a\u8fc7\u6784\u5efa\u591a\u68f5\u968f\u673a\u5316\u7684\u51b3\u7b56\u6811\u6765\u964d\u4f4e\u6a21\u578b\u7684\u65b9\u5dee\u3002<\/li>\n    <li>\u4e0e\u968f\u673a\u68ee\u6797\u4e0d\u540c\uff0cExtra Trees \u5728\u6bcf\u4e2a\u8282\u70b9\u968f\u673a\u9009\u62e9\u7279\u5f81\u548c\u5207\u5206\u70b9\uff0c\u800c\u4e0d\u662f\u9009\u62e9\u6700\u4f18\u7684\u3002<\/li>\n    <li>\u8fd9\u79cd\u6781\u7aef\u7684\u968f\u673a\u6027\u6709\u52a9\u4e8e\u51cf\u5c11\u8fc7\u62df\u5408\uff0c\u63d0\u9ad8\u6a21\u578b\u7684\u6cdb\u5316\u80fd\u529b\u3002<br><\/li>\n<\/ul>\n\n\n<p>\u7136\u800c\uff0cscikit-learn \u4e2d\u7684\u51b3\u7b56\u6811\u5b9e\u73b0\uff08\u5982 CART \u548c Extra Trees\uff09\u5728\u5904\u7406\u5206\u7c7b\u53d8\u91cf\u65f6\uff0c\u901a\u5e38\u8981\u6c42\u5c06\u5176\u8f6c\u6362\u4e3a\u6570\u503c\u5f62\u5f0f\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u9700\u8981\u5bf9\u5206\u7c7b\u53d8\u91cf\u8fdb\u884c\u7f16\u7801\uff0c\u4f8b\u5982\u72ec\u70ed\u7f16\u7801\uff08One-Hot Encoding\uff09\u6216\u6574\u6570\u7f16\u7801\u3002\u8fd9\u662f\u56e0\u4e3a scikit-learn \u7684\u5b9e\u73b0\u5e76\u4e0d\u76f4\u63a5\u652f\u6301\u539f\u59cb\u7684\u5206\u7c7b\u53d8\u91cf\u5904\u7406\uff0c\u5373\u4e0d\u652f\u6301\u5bf9\u7c7b\u522b\u96c6\u5408\u8fdb\u884c\u4e8c\u5143\u5212\u5206\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n<p>\u72ec\u70ed\u7f16\u7801\u793a\u4f8b\uff1a<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2024\/10\/%E6%BC%94%E7%A4%BA%E6%96%87%E7%A8%BF1_04.png\" class=\"wp-image-392\" \/><\/figure><\/div>\n\n\n<p>\u4ee5\u4e00\u4e2a\u5305\u542b\u57ce\u5e02\u4fe1\u606f\u7684\u5206\u7c7b\u53d8\u91cf\u4e3a\u4f8b\uff0c\u7c7b\u522b\u5305\u62ec\uff1a\u5317\u4eac\u3001\u4e0a\u6d77\u3001\u5e7f\u5dde\u3001\u6df1\u5733\u3001\u5176\u4ed6\u3002\u4f7f\u7528\u72ec\u70ed\u7f16\u7801\u540e\uff0c\u8be5\u53d8\u91cf\u5c06\u88ab\u8f6c\u6362\u4e3a\u4ee5\u4e0b\u4e8c\u8fdb\u5236\u7279\u5f81\uff1a<\/p>\n\n\n<p>\u2022 \u5317\u4eac\uff1a[1, 0, 0, 0, 0]<\/p>\n\n\n<p>\u2022 \u4e0a\u6d77\uff1a[0, 1, 0, 0, 0]<\/p>\n\n\n<p>\u2022 \u5e7f\u5dde\uff1a [0, 0, 1, 0, 0]<\/p>\n\n\n<p>\u2022 \u6df1\u5733\uff1a [0, 0, 0, 1, 0]<\/p>\n\n\n<p>\u2022 \u5176\u4ed6\uff1a [0, 0, 0, 0, 1]<\/p>\n\n\n<p>\u8fd9\u79cd\u7f16\u7801\u65b9\u5f0f\u5c06\u6bcf\u4e2a\u7c7b\u522b\u89c6\u4e3a\u72ec\u7acb\u7684\u4e8c\u8fdb\u5236\u7279\u5f81\uff0c\u51b3\u7b56\u6811\u53ef\u4ee5\u6839\u636e\u8fd9\u4e9b\u7279\u5f81\u8fdb\u884c\u5206\u5272\u3002\u4f8b\u5982\uff0c\u51b3\u7b56\u6811\u53ef\u80fd\u4f1a\u6839\u636e\u201c\u662f\u5426\u4e3a\u5317\u4eac\u201d\u8fd9\u4e00\u7279\u5f81\u6765\u5206\u5272\u6570\u636e\uff0c\u800c\u4e0d\u4f1a\u8003\u8651\u7c7b\u522b\u4e4b\u95f4\u7684\u7ec4\u5408\u5173\u7cfb\u3002<\/p>\n\n\n<p>\u4e09\u3001\u5f71\u54cd\u5206\u6790\uff1a\u4e0d\u540c\u5904\u7406\u65b9\u5f0f\u5bf9\u6a21\u578b\u7684\u5f71\u54cd<\/p>\n\n\n<p>\u5c06\u5206\u7c7b\u53d8\u91cf\u8f6c\u6362\u4e3a\u72ec\u70ed\u7f16\u7801\u4e0e\u76f4\u63a5\u5904\u7406\u539f\u59cb\u5206\u7c7b\u53d8\u91cf\uff0c\u5bf9\u6a21\u578b\u7684\u6027\u80fd\u548c\u8ba1\u7b97\u590d\u6742\u5ea6\u6709\u7740\u663e\u8457\u7684\u5f71\u54cd\u3002<\/p>\n\n\n<ol class=\"wp-block-list\">\n    <li>\u72ec\u70ed\u7f16\u7801\uff08One-Hot Encoding\uff09<br><\/li>\n<\/ol>\n\n\n<p>\u4f18\u70b9\uff1a<\/p>\n\n\n<p>\u517c\u5bb9\u6027\u5f3a\uff1a\u9002\u7528\u4e8e\u4e0d\u652f\u6301\u76f4\u63a5\u5904\u7406\u5206\u7c7b\u53d8\u91cf\u7684\u7b97\u6cd5\uff0c\u5b9e\u73b0\u7b80\u5355\u3002<\/p>\n\n\n<p>\u7f3a\u70b9\uff1a<\/p>\n\n\n<ul class=\"wp-block-list\">\n    <li>\u5ffd\u7565\u7c7b\u522b\u5173\u7cfb\uff1a\u5c06\u7c7b\u522b\u89c6\u4e3a\u76f8\u4e92\u72ec\u7acb\uff0c\u65e0\u6cd5\u6355\u6349\u7c7b\u522b\u4e4b\u95f4\u7684\u5185\u5728\u8054\u7cfb\u548c\u4ea4\u4e92\u3002<\/li>\n    <li>\u7ef4\u5ea6\u589e\u52a0\uff1a\u5bf9\u4e8e\u9ad8\u57fa\u6570\uff08\u7c7b\u522b\u6570\u91cf\u591a\uff09\u7684\u53d8\u91cf\uff0c\u7279\u5f81\u7a7a\u95f4\u7ef4\u5ea6\u6025\u5267\u589e\u52a0\uff0c\u53ef\u80fd\u5bfc\u81f4\u6a21\u578b\u8bad\u7ec3\u53d8\u6162\uff0c\u8fc7\u62df\u5408\u98ce\u9669\u589e\u52a0\u3002<\/li>\n    <li>\u8ba1\u7b97\u590d\u6742\u5ea6\u589e\u52a0\uff1a\u9ad8\u7ef4\u5ea6\u6570\u636e\u4f1a\u589e\u52a0\u6a21\u578b\u7684\u8ba1\u7b97\u548c\u5b58\u50a8\u6210\u672c\uff0c\u5c24\u5176\u5728\u5927\u6570\u636e\u96c6\u7684\u60c5\u51b5\u4e0b\u3002<br><\/li>\n<\/ul>\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n    <li>\u76f4\u63a5\u5904\u7406\u539f\u59cb\u5206\u7c7b\u53d8\u91cf<br><\/li>\n<\/ol>\n\n\n<p>\u4f18\u70b9\uff1a<\/p>\n\n\n<ul class=\"wp-block-list\">\n    <li>\u4fdd\u7559\u7c7b\u522b\u5173\u7cfb\uff1a\u80fd\u591f\u6355\u6349\u7c7b\u522b\u4e4b\u95f4\u7684\u590d\u6742\u5173\u7cfb\uff0c\u63d0\u9ad8\u6a21\u578b\u7684\u51c6\u786e\u6027\u548c\u6cdb\u5316\u80fd\u529b\u3002<\/li>\n    <li>\u6a21\u578b\u66f4\u7b80\u6d01\uff1a\u53ef\u80fd\u751f\u6210\u66f4\u6d45\u3001\u66f4\u7b80\u5355\u7684\u6811\uff0c\u964d\u4f4e\u8fc7\u62df\u5408\u7684\u98ce\u9669\u3002<br><\/li>\n<\/ul>\n\n\n<p>\u7f3a\u70b9\uff1a<\/p>\n\n\n<p>\u2022 \u8ba1\u7b97\u590d\u6742\u5ea6\u9ad8\uff1a\u5bf9\u4e8e\u7c7b\u522b\u6570\u91cf\u4e3a \\(n\\) \u7684\u53d8\u91cf\uff0c\u9700\u8981\u8bc4\u4f30 \\((2^n &#8211; 2) \/ 2\\) \u79cd\u53ef\u80fd\u7684\u5212\u5206\uff0c\u8ba1\u7b97\u91cf\u5448\u6307\u6570\u7ea7\u589e\u957f\u3002<\/p>\n\n\n<p>\u2022 \u5b9e\u73b0\u53d7\u9650\uff1a\u9700\u8981\u7b97\u6cd5\u652f\u6301\u76f4\u63a5\u5904\u7406\u5206\u7c7b\u53d8\u91cf\uff0c\u90e8\u5206\u5e93\uff08\u5982 scikit-learn\uff09\u53ef\u80fd\u4e0d\u652f\u6301\u3002<\/p>\n\n\n<p>\u8ba1\u7b97\u590d\u6742\u5ea6\u793a\u4f8b\uff1a<\/p>\n\n\n<p>\u5f53\u7c7b\u522b\u6570\u91cf \\(n\\) \u4ece 1 \u589e\u52a0\u5230 10 \u65f6\uff0c\u9700\u8981\u8bc4\u4f30\u7684\u5212\u5206\u6570\u91cf\u4e3a\uff1a<\/p>\n\n\n<p>\u2022 \\(n = 1\\)\uff1a0 \u79cd <\/p>\n\n\n<p>\u2022 \\(n = 2\\)\uff1a1 \u79cd<\/p>\n\n\n<p>\u2022 \\(n = 3\\)\uff1a3 \u79cd<\/p>\n\n\n<p>\u2022 \\(n = 4\\)\uff1a7 \u79cd<\/p>\n\n\n<p>\u2022 \\(n = 5\\)\uff1a15 \u79cd<\/p>\n\n\n<p>\u2022 \\(n = 6\\)\uff1a31 \u79cd<\/p>\n\n\n<p>\u2022 \\(n = 7\\)\uff1a63 \u79cd<\/p>\n\n\n<p>\u2022 \\(n = 8\\)\uff1a127 \u79cd<\/p>\n\n\n<p>\u2022 \\(n = 9\\)\uff1a255 \u79cd<\/p>\n\n\n<p>\u2022 \\(n = 10\\)\uff1a511 \u79cd<\/p>\n\n\n<p>\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53 \\(n > 5\\) \u65f6\uff0c\u5212\u5206\u53ef\u80fd\u6027\u6025\u5267\u589e\u52a0\uff0c\u8ba1\u7b97\u6210\u672c\u5927\u5e45\u4e0a\u5347\u3002\u56e0\u6b64\uff0c\u5bf9\u4e8e\u9ad8\u57fa\u6570\u7684\u5206\u7c7b\u53d8\u91cf\uff0c\u76f4\u63a5\u5904\u7406\u5728\u8ba1\u7b97\u4e0a\u5e76\u4e0d\u73b0\u5b9e\u3002<\/p>\n\n\n<p>\u56db\u3001\u5904\u7406\u5efa\u8bae<\/p>\n\n\n<p>\u6839\u636e\u4e0a\u8ff0\u5206\u6790\uff0c\u9488\u5bf9\u4e0d\u540c\u60c5\u51b5\uff0c\u63d0\u51fa\u4ee5\u4e0b\u5904\u7406\u5efa\u8bae\uff1a<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2024\/10\/%E6%BC%94%E7%A4%BA%E6%96%87%E7%A8%BF1_05.png\" class=\"wp-image-391\" \/><\/figure><\/div>\n\n\n<ol class=\"wp-block-list\">\n    <li>\u7c7b\u522b\u6570\u91cf\u8f83\u5c11\u7684\u5206\u7c7b\u53d8\u91cf<br><\/li>\n<\/ol>\n\n\n<ul class=\"wp-block-list\">\n    <li>\u5efa\u8bae\u65b9\u6cd5\uff1a\u76f4\u63a5\u5904\u7406\u539f\u59cb\u5206\u7c7b\u53d8\u91cf\u3002<\/li>\n    <li>\u7406\u7531\uff1a\u8ba1\u7b97\u6210\u672c\u53ef\u63a7\uff0c\u80fd\u591f\u5145\u5206\u5229\u7528\u7c7b\u522b\u95f4\u7684\u5173\u7cfb\uff0c\u63d0\u9ad8\u6a21\u578b\u6027\u80fd\u3002<\/li>\n    <li>\u5b9e\u65bd\u65b9\u5f0f\uff1a\u5982\u679c\u4f7f\u7528\u652f\u6301\u76f4\u63a5\u5904\u7406\u5206\u7c7b\u53d8\u91cf\u7684\u7b97\u6cd5\u6216\u5e93\uff08\u5982 XGBoost\u3001LightGBM \u7b49\uff09\uff0c\u53ef\u76f4\u63a5\u8f93\u5165\u5206\u7c7b\u53d8\u91cf\u3002<br><\/li>\n<\/ul>\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n    <li>\u9ad8\u57fa\u6570\u7684\u5206\u7c7b\u53d8\u91cf<br><\/li>\n<\/ol>\n\n\n<ul class=\"wp-block-list\">\n    <li>\u5efa\u8bae\u65b9\u6cd5\uff1a\u4f7f\u7528\u76ee\u6807\u7f16\u7801\u3001\u9891\u6570\u7f16\u7801\u6216\u5bf9\u7c7b\u522b\u8fdb\u884c\u5408\u5e76\u3002<\/li>\n    <li>\u7406\u7531\uff1a\u964d\u4f4e\u7279\u5f81\u7ef4\u5ea6\uff0c\u63a7\u5236\u8ba1\u7b97\u6210\u672c\uff0c\u907f\u514d\u72ec\u70ed\u7f16\u7801\u5bfc\u81f4\u7684\u7ef4\u5ea6\u7206\u70b8\u3002<\/li>\n    <li>\u5b9e\u65bd\u65b9\u5f0f\uff1a<br><ul>\n            <li>\u76ee\u6807\u7f16\u7801\uff08Target Encoding\uff09\uff1a\u7528\u76ee\u6807\u53d8\u91cf\u7684\u5e73\u5747\u503c\u6216\u6982\u7387\u6765\u66ff\u4ee3\u7c7b\u522b\u3002<\/li>\n            <li>\u9891\u6570\u7f16\u7801\uff08Frequency Encoding\uff09\uff1a\u7528\u7c7b\u522b\u51fa\u73b0\u7684\u9891\u7387\u6216\u8ba1\u6570\u6765\u66ff\u4ee3\u7c7b\u522b\u3002<\/li>\n            <li>\u7c7b\u522b\u5408\u5e76\uff1a\u6839\u636e\u4e1a\u52a1\u77e5\u8bc6\u6216\u7edf\u8ba1\u7279\u6027\uff0c\u5c06\u9891\u6b21\u8f83\u4f4e\u7684\u7c7b\u522b\u5408\u5e76\u4e3a\u201c\u5176\u4ed6\u201d\u7c7b\u522b\u3002<br><\/li>\n        <\/ul><\/li>\n<\/ul>\n\n\n<ol class=\"wp-block-list\" start=\"3\">\n    <li>\u4f7f\u7528\u4e0d\u652f\u6301\u5206\u7c7b\u53d8\u91cf\u7684\u7b97\u6cd5\u6216\u5e93<br><\/li>\n<\/ol>\n\n\n<ul class=\"wp-block-list\">\n    <li>\u5efa\u8bae\u65b9\u6cd5\uff1a\u4f7f\u7528\u72ec\u70ed\u7f16\u7801\u6216\u6574\u6570\u7f16\u7801\uff08\u614e\u7528\uff09\u3002<\/li>\n    <li>\u7406\u7531\uff1a\u786e\u4fdd\u6570\u636e\u80fd\u88ab\u7b97\u6cd5\u63a5\u53d7\uff0c\u5c3d\u7ba1\u53ef\u80fd\u6709\u4e0a\u8ff0\u7f3a\u70b9\uff0c\u4f46\u5728\u65e0\u6cd5\u76f4\u63a5\u5904\u7406\u7684\u60c5\u51b5\u4e0b\u662f\u5fc5\u8981\u7684\u6298\u4e2d\u3002<\/li>\n    <li>\u6ce8\u610f\u4e8b\u9879\uff1a<br><ul>\n            <li>\u72ec\u70ed\u7f16\u7801\uff1a\u9002\u7528\u4e8e\u7c7b\u522b\u6570\u91cf\u8f83\u5c11\u7684\u60c5\u51b5\uff0c\u907f\u514d\u9ad8\u7ef4\u5ea6\u95ee\u9898\u3002<\/li>\n            <li>\u6574\u6570\u7f16\u7801\uff1a\u53ef\u80fd\u5f15\u5165\u7c7b\u522b\u4e4b\u95f4\u7684\u5e8f\u6570\u5173\u7cfb\uff0c\u9700\u8c28\u614e\u4f7f\u7528\u3002<br><\/li>\n        <\/ul><\/li>\n<\/ul>\n\n\n<ol class=\"wp-block-list\" start=\"4\">\n    <li>\u8ba1\u7b97\u8d44\u6e90\u6709\u9650\u7684\u573a\u666f<br><\/li>\n<\/ol>\n\n\n<ul class=\"wp-block-list\">\n    <li>\u5efa\u8bae\u65b9\u6cd5\uff1a\u5408\u5e76\u7c7b\u522b\u3001\u964d\u7ef4\u6216\u91c7\u6837\uff0c\u63a7\u5236\u7279\u5f81\u7ef4\u5ea6\u548c\u6570\u636e\u89c4\u6a21\u3002<\/li>\n    <li>\u7406\u7531\uff1a\u964d\u4f4e\u8ba1\u7b97\u590d\u6742\u5ea6\uff0c\u786e\u4fdd\u6a21\u578b\u5728\u6709\u9650\u8d44\u6e90\u4e0b\u6b63\u5e38\u8bad\u7ec3\u3002<\/li>\n    <li>\u5b9e\u65bd\u65b9\u5f0f\uff1a<br><ul>\n            <li>\u7279\u5f81\u9009\u62e9\uff1a\u9009\u62e9\u91cd\u8981\u7684\u5206\u7c7b\u53d8\u91cf\uff0c\u5254\u9664\u5f71\u54cd\u8f83\u5c0f\u7684\u53d8\u91cf\u3002<\/li>\n            <li>\u7c7b\u522b\u5408\u5e76\uff1a\u5c06\u4f4e\u9891\u7c7b\u522b\u5408\u5e76\uff0c\u51cf\u5c11\u7c7b\u522b\u6570\u91cf\u3002<\/li>\n            <li>\u964d\u7ef4\u6280\u672f\uff1a\u4f7f\u7528\u4e3b\u6210\u5206\u5206\u6790\uff08PCA\uff09\u7b49\u65b9\u6cd5\u964d\u4f4e\u7279\u5f81\u7ef4\u5ea6\u3002<br><\/li>\n        <\/ul><\/li>\n<\/ul>\n\n\n<p>\u4e94\u3001\u603b\u7ed3<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.xuzhe.tj.cn\/wp-content\/uploads\/2024\/10\/%E6%BC%94%E7%A4%BA%E6%96%87%E7%A8%BF1_06.png\" class=\"wp-image-390\" \/><\/figure><\/div>\n\n\n<p>\u5206\u7c7b\u53d8\u91cf\u5728\u673a\u5668\u5b66\u4e60\u4e2d\u666e\u904d\u5b58\u5728\uff0c\u5982\u4f55\u6709\u6548\u5730\u5904\u7406\u8fd9\u4e9b\u53d8\u91cf\u5bf9\u6a21\u578b\u7684\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002\u51b3\u7b56\u6811\u7b97\u6cd5\u5728\u7406\u8bba\u4e0a\u5177\u6709\u76f4\u63a5\u5904\u7406\u5206\u7c7b\u53d8\u91cf\u7684\u80fd\u529b\uff0c\u80fd\u591f\u901a\u8fc7\u8bc4\u4f30\u6240\u6709\u53ef\u80fd\u7684\u7c7b\u522b\u5212\u5206\uff0c\u6355\u6349\u7c7b\u522b\u4e4b\u95f4\u7684\u590d\u6742\u5173\u7cfb\u3002\u7136\u800c\uff0c\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u53d7\u9650\u4e8e\u7b97\u6cd5\u5b9e\u73b0\u548c\u8ba1\u7b97\u8d44\u6e90\uff0c\u76f4\u63a5\u5904\u7406\u9ad8\u57fa\u6570\u7684\u5206\u7c7b\u53d8\u91cf\u5e76\u4e0d\u603b\u662f\u53ef\u884c\u3002<\/p>\n\n\n<p>\u5bf9\u4e8e\u7c7b\u522b\u6570\u91cf\u8f83\u5c11\u7684\u5206\u7c7b\u53d8\u91cf\uff0c\u76f4\u63a5\u5904\u7406\u80fd\u591f\u5145\u5206\u5229\u7528\u6570\u636e\u7279\u6027\uff0c\u63d0\u5347\u6a21\u578b\u6027\u80fd\u3002\u5bf9\u4e8e\u9ad8\u57fa\u6570\u7684\u5206\u7c7b\u53d8\u91cf\uff0c\u5efa\u8bae\u91c7\u7528\u76ee\u6807\u7f16\u7801\u3001\u9891\u6570\u7f16\u7801\u6216\u7c7b\u522b\u5408\u5e76\u7b49\u65b9\u6cd5\uff0c\u4ee5\u63a7\u5236\u7279\u5f81\u7ef4\u5ea6\u548c\u8ba1\u7b97\u6210\u672c\u3002<\/p>\n\n\n<p>\u5728\u9009\u62e9\u5904\u7406\u65b9\u6cd5\u65f6\uff0c\u9700\u8981\u7efc\u5408\u8003\u8651\u7c7b\u522b\u6570\u91cf\u3001\u7b97\u6cd5\u652f\u6301\u3001\u8ba1\u7b97\u8d44\u6e90\u4ee5\u53ca\u6a21\u578b\u7684\u9700\u6c42\u3002\u5408\u7406\u5730\u5904\u7406\u5206\u7c7b\u53d8\u91cf\uff0c\u80fd\u591f\u5728\u4fdd\u8bc1\u6a21\u578b\u6027\u80fd\u7684\u540c\u65f6\uff0c\u63d0\u9ad8\u8ba1\u7b97\u6548\u7387\uff0c\u964d\u4f4e\u8fc7\u62df\u5408\u7684\u98ce\u9669\u3002<\/p>\n\n\n<p>\u5173\u952e\u8981\u70b9\uff1a<\/p>\n\n\n<ul 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