{"id":1856,"date":"2024-05-23T19:43:21","date_gmt":"2024-05-23T11:43:21","guid":{"rendered":"https:\/\/17aitech.com\/?p=1856"},"modified":"2024-10-08T15:24:50","modified_gmt":"2024-10-08T07:24:50","slug":"%e3%80%90%e8%af%be%e7%a8%8b%e6%80%bb%e7%bb%93%e3%80%91day2%ef%bc%9aknn%e7%ae%97%e6%b3%95","status":"publish","type":"post","link":"https:\/\/17aitech.com\/?p=1856","title":{"rendered":"\u3010\u8bfe\u7a0b\u603b\u7ed3\u3011Day2\uff1aKNN\u7b97\u6cd5"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 ez-toc-wrap-left-text counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u6587\u7ae0\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span 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href=\"https:\/\/17aitech.com\/?p=1856\/#%E6%AC%A7%E5%BC%8F%E8%B7%9D%E7%A6%BB%E8%AE%A1%E7%AE%97%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0\" >\u6b27\u5f0f\u8ddd\u79bb\u8ba1\u7b97\u4ee3\u7801\u5b9e\u73b0<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/17aitech.com\/?p=1856\/#%E7%BA%BF%E6%80%A7%E4%BB%A3%E6%95%B0%E8%A7%86%E8%A7%92%E5%90%91%E9%87%8F%E8%A7%86%E8%A7%92\" >\u7ebf\u6027\u4ee3\u6570\u89c6\u89d2(\u5411\u91cf\u89c6\u89d2)<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/17aitech.com\/?p=1856\/#%E4%BD%99%E5%BC%A6%E7%9B%B8%E4%BC%BC%E5%BA%A6%E8%AE%A1%E7%AE%97%E5%85%AC%E5%BC%8F\" >\u4f59\u5f26\u76f8\u4f3c\u5ea6\u8ba1\u7b97\u516c\u5f0f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/17aitech.com\/?p=1856\/#%E4%BD%99%E5%BC%A6%E7%9B%B8%E4%BC%BC%E5%BA%A6%E8%AE%A1%E7%AE%97%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0\" >\u4f59\u5f26\u76f8\u4f3c\u5ea6\u8ba1\u7b97\u4ee3\u7801\u5b9e\u73b0<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/17aitech.com\/?p=1856\/#KNN%E6%8E%A8%E7%90%86%E8%BF%87%E7%A8%8B%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%E4%B8%8D%E4%BD%BF%E7%94%A8sklearn%E5%86%85%E7%BD%AE%E5%87%BD%E6%95%B0\" >KNN\u63a8\u7406\u8fc7\u7a0b\u4ee3\u7801\u5b9e\u73b0(\u4e0d\u4f7f\u7528sklearn\u5185\u7f6e\u51fd\u6570)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/17aitech.com\/?p=1856\/#%E5%86%85%E5%AE%B9%E5%B0%8F%E7%BB%93%EF%BC%9A\" >\u5185\u5bb9\u5c0f\u7ed3\uff1a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/17aitech.com\/?p=1856\/#%E5%8F%82%E8%80%83%E8%B5%84%E6%96%99%EF%BC%9A\" >\u53c2\u8003\u8d44\u6599\uff1a<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%E5%89%8D%E8%A8%80\"><\/span>\u524d\u8a00<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u4e0a\u8282\u8bfe\u4e3b\u8981\u5b66\u4e60\u4e86\u673a\u5668\u5b66\u4e60\u7684\u57fa\u672c\u9879\u76ee\u6d41\u7a0b\uff0c\u5177\u4f53\u8bf7\u89c1<a href=\"https:\/\/17aitech.com\/?p=1796\">\u3010\u8bfe\u7a0b\u603b\u7ed3\u3011Day1\uff1a\u4eba\u5de5\u667a\u80fd\u7684\u6838\u5fc3\u6982\u5ff5<\/a>\u3002<\/p>\n<p>\u672c\u7ae0\u5b66\u4e60\u7684\u5185\u5bb9\u4e3b\u8981\u662f\u673a\u5668\u5b66\u4e60\u6700\u7b80\u5355\u7684\u4e00\u4e2a\u7b97\u6cd5\uff1a<code>KNN\u7b97\u6cd5<\/code>\u3002<br \/>\n\u4e3a\u4e86\u5bf9\u7b97\u6cd5\u6709\u4e2a\u76f4\u89c2\u7406\u89e3\uff0c\u4eca\u5929\u7684\u8bfe\u7a0b\u6574\u4f53\u7684\u8fc7\u7a0b\u6982\u62ec\u4e3a\uff1a<br \/>\n1\u3001<strong>\u5b9e\u4f8b\u4ee3\u5165<\/strong>\uff1a\u5148\u4ece\u4e00\u4e2a\u7ecf\u5178\u7684\u4f8b\u5b50 <code>\u9e22\u5c3e\u82b1\u5206\u7c7b<\/code> \u95ee\u9898\u4ee3\u5165\uff0c\u7406\u89e3\u673a\u5668\u5b66\u4e60\u7684\u57fa\u672c\u8fc7\u7a0b\uff0c\u5373\uff1a<code>\u5206\u6790\u95ee\u9898<\/code> \u2192 <code>\u91c7\u96c6\u6570\u636e<\/code> \u2192 <code>\u9074\u9009\u7b97\u6cd5<\/code> \u2192 <code>\u4ee3\u7801\u5b9e\u73b0<\/code> \u2192 <code>\u90e8\u7f72\u96c6\u6210<\/code><br \/>\n2\u3001<strong>\u4ee3\u7801\u5b9e\u73b0<\/strong>\uff1a\u7ed3\u5408\u4e0a\u8ff0\u95ee\u9898\uff0c\u901a\u8fc7 <code>sklearn<\/code> \u5b9e\u73b0KNN\u7684\u4f7f\u7528\u8fc7\u7a0b\uff0c\u5373\uff1a<code>\u6784\u5efa\u6a21\u578b<\/code>\u2192<code>\u8bad\u7ec3\u6a21\u578b<\/code>\u2192<code>\u4f7f\u7528\u6a21\u578b\u9884\u6d4b<\/code><\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%AE%9E%E4%BE%8B%E4%BB%A3%E5%85%A5%EF%BC%9A%E9%B8%A2%E5%B0%BE%E8%8A%B1%E5%88%86%E7%B1%BB\"><\/span>\u5b9e\u4f8b\u4ee3\u5165\uff1a\u9e22\u5c3e\u82b1\u5206\u7c7b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"%E9%97%AE%E9%A2%98%E5%9C%BA%E6%99%AF\"><\/span>\u95ee\u9898\u573a\u666f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/yuanweihua.jpeg\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/yuanweihua.jpeg\" alt=\"\" \/><\/a><br \/>\n\u9e22\u5c3e\u82b1\uff08Iris\uff09\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u82b1\u5349\u690d\u7269\uff0c\u5176\u5206\u7c7b\u6709\u591a\u79cd\u4e0d\u540c\u7684\u54c1\u79cd\uff0c\u5176\u4e2d\u6700\u4e3a\u8457\u540d\u7684\u6709<code><code>\u4e09\u79cd<\/code><\/code>\u7c7b\u522b\uff1a<\/p>\n<ul>\n<li>\u5c71\u9e22\u5c3e\uff08Iris setosa\uff09\uff1a\u5177\u6709\u77ed\u800c\u76f4\u7acb\u7684\u53f6\u5b50\u548c\u9c9c\u8273\u7684\u82b1\u6735\uff0c\u751f\u957f\u5728\u5bd2\u51b7\u6c14\u5019\u4e0b\u3002<\/li>\n<li>\u6742\u8272\u9e22\u5c3e\uff08Iris versicolor\uff09\uff1a\u53f6\u5b50\u5bbd\u5927\u800c\u6241\u5e73\uff0c\u82b1\u6735\u989c\u8272\u4e30\u5bcc\uff0c\u5e38\u89c1\u4e8e\u5317\u7f8e\u6d32\u6e7f\u5730\u3002<\/li>\n<li>\u957f\u9798\u9e22\u5c3e\uff08Iris virginica\uff09\uff1a\u53f6\u7247\u5f2f\u66f2\uff0c\u82b1\u6735\u5927\u800c\u4e30\u6ee1\uff0c\u751f\u957f\u5728\u6e7f\u6da6\u7684\u571f\u58e4\u4e2d\u3002<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%E7%AC%AC%E4%B8%80%E6%AD%A5%EF%BC%9A%E5%88%86%E6%9E%90%E9%97%AE%E9%A2%98\"><\/span>\u7b2c\u4e00\u6b65\uff1a\u5206\u6790\u95ee\u9898<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"%E5%AE%9A%E4%B9%89%E9%97%AE%E9%A2%98\"><\/span>\u5b9a\u4e49\u95ee\u9898<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5206\u6790\u6211\u4eec\u8981\u89e3\u51b3\u7684\u95ee\u9898\uff0c\u5373\uff1a<font color='red'><strong>\u7ed9\u5b9a\u4e00\u6735\u9e22\u5c3e\u82b1<\/strong><\/font>\uff0c\u8ba9\u673a\u5668\u5224\u65ad\u662f\u4e09\u79cd\u7c7b\u522b\u4e2d\u7684\u54ea\u4e00\u79cd\u7c7b\u522b\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E5%88%86%E6%9E%90%E8%BE%93%E5%85%A5%E8%BE%93%E5%87%BA\"><\/span>\u5206\u6790\u8f93\u5165\/\u8f93\u51fa<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u8f93\u5165\uff1a\u82b1<br \/>\n\u8f93\u51fa\uff1a\u7c7b\u522b<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E6%95%B0%E5%AD%97%E5%8C%96%E5%AE%9E%E4%BD%93entity\"><\/span>\u6570\u5b57\u5316\u5b9e\u4f53(entity)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u7531\u4e8e\u6211\u4eec\u9700\u8981\u901a\u8fc7\u673a\u5668\u6765\u8fdb\u884c\u5904\u7406\uff0c\u6240\u4ee5\u9996\u8981\u9700\u8981\u89e3\u51b3\u7684\u95ee\u9898\u662f\uff1a<code><code>\u5982\u4f55\u6570\u5b57\u5316\u5b9e\u4f53<\/code><\/code><\/p>\n<ul>\n<li>\n<p>\u4e00\u822c\u6570\u5b57\u5316\u5b9e\u4f53\u7684\u65b9\u5f0f\u662f\uff1a\u901a\u8fc7\u8fd9\u4e2a\u5b9e\u4f53\u7684\u7279\u5f81(\u6216\u5c5e\u6027)\u6765\u523b\u753b\u8fd9\u4e2a\u5b9e\u4f53\uff0c\u4f8b\u5982\uff1a<\/p>\n<blockquote>\n<p>\u523b\u753b\u4e00\u4e2a\u4eba\u53ef\u4ee5\u901a\u8fc7\u5e74\u9f84\u3001\u6027\u522b\u3001\u56fd\u7c4d&#8230;\u6765\u523b\u753b\uff0c\u540c\u7406\u4e00\u6735\u82b1\u53ef\u4ee5\u7528\u76f8\u5173\u5c5e\u6027(\u5982\uff1a\u989c\u8272\u3001\u5927\u5c0f\u3001\u91cd\u91cf&#8230;..\u6765\u523b\u753b)<\/p>\n<\/blockquote>\n<\/li>\n<li>\n<p>\u5177\u4f53\u9009\u62e9\u4ec0\u4e48\u7279\u5f81\uff0c\u9700\u8981\u6839\u636e\u5b9e\u9645\u4e1a\u52a1\u573a\u666f\u6765\u8fdb\u884c\u5b9a\u4e49(\u5982\uff1a\u627e\u4e1a\u52a1\u4e13\u5bb6\u901a\u8fc7\u4e1a\u52a1\u573a\u666f\u8fdb\u884c\u7279\u5f81\u5b9a\u4e49)\u3002<\/p>\n<\/li>\n<li>\n<p>\u5728\u672c\u4f8b\u4e2d\u7684\u95ee\u9898\uff0c\u7531\u4e8e\u9e22\u5c3e\u82b1\u7684\u4e09\u4e2a\u7c7b\u522b\u901a\u8fc7\u989c\u8272\u3001\u5927\u5c0f\u662f\u65e0\u6cd5\u533a\u5206\u7684\uff0c\u4e3b\u8981\u662f\u901a\u8fc7\u82b1\u74e3\u6765\u8fdb\u884c\u5206\u7c7b\uff0c\u5177\u4f53\u662f\uff1a\u82b1\u74e3\u957f\u3001\u82b1\u74e3\u5bbd\u3001\u82b1\u843c\u957f\u3001\u82b1\u843c\u5bbd<\/p>\n<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"%E6%98%8E%E7%A1%AE%E8%BE%93%E5%85%A5%E8%BE%93%E5%87%BA\"><\/span>\u660e\u786e\u8f93\u5165\/\u8f93\u51fa<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u5206\u6790\uff0c\u6211\u4eec\u5373\u53ef\u4ee5\u660e\u786e\u8f93\u5165\u8f93\u51fa\uff1a<\/p>\n<ul>\n<li>\u8f93\u5165\uff1a\u82b1\u74e3\u957f\u3001\u82b1\u74e3\u5bbd\u3001\u82b1\u843c\u957f\u3001\u82b1\u843c\u5bbd<\/li>\n<li>\u8f93\u51fa\uff1a\u82b1\u7684\u7c7b\u522b<br \/>\n<blockquote>\n<p>\u5907\u6ce8\uff1a<br \/>\n1\u3001\u82b1\u7684\u7c7b\u522b\u53ef\u4ee5\u7528\u6570\u5b57\u7f16\u53f7\uff0c\u4f8b\u5982\uff1a\u4ece0,1,2\u8fdb\u884c\u7c7b\u522b\u7f16\u53f7<br \/>\n2\u3001\u6709\u4e0a\u8ff0\u53ef\u4ee5\u5f97\u5230\u4e00\u4e2a\u6837\u672c\u5185\u5bb9\u683c\u5f0f\u4e3a\uff1a<\/p>\n<pre><code>\u82b1\u74e3\u957f,\u82b1\u74e3\u5bbd,\u82b1\u843c\u957f,\u82b1\u843c\u5bbd,\u7c7b\u522b\u7f16\u53f7<\/code><\/pre>\n<\/blockquote>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%E7%AC%AC%E4%BA%8C%E6%AD%A5%EF%BC%9A%E9%87%87%E9%9B%86%E6%95%B0%E6%8D%AE\"><\/span>\u7b2c\u4e8c\u6b65\uff1a\u91c7\u96c6\u6570\u636e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u91c7\u96c6\u8bad\u7ec3\u7684\u6570\u636e\uff0c\u8fd9\u4e00\u8fc7\u7a0b\u4e00\u822c\u9700\u8981\u6839\u636e\u4e0a\u8ff0\u7684\u6837\u672c\u5185\u5bb9\u683c\u5f0f\uff0c\u4eba\u5de5\u91c7\u96c6\u548c\u6807\u6ce8\u76f8\u5173\u7684\u6570\u636e\u3002<\/p>\n<blockquote>\n<p>\u5728scikit-learn\uff08sklearn\uff09\u4e2d\uff0c\u9e22\u5c3e\u82b1\u6570\u636e\u96c6\uff08Iris dataset\uff09\u662f\u4e00\u4e2a\u7ecf\u5178\u7684\u793a\u4f8b\uff0c\u5e38\u7528\u4e8e\u673a\u5668\u5b66\u4e60\u7b97\u6cd5\u7684\u6f14\u793a\u548c\u6d4b\u8bd5\u3002\u8be5\u6570\u636e\u96c6\u7531Fisher\u57281936\u6536\u96c6\u6574\u7406\uff0c\u6570\u636e\u96c6\u5305\u542b150\u4e2a\u6570\u636e\u96c6\uff0c\u5206\u4e3a3\u7c7b\uff0c\u6bcf\u7c7b50\u4e2a\u6570\u636e\uff0c\u6bcf\u4e2a\u6570\u636e\u5305\u542b4\u4e2a\u5c5e\u6027\u3002\u53ef\u901a\u8fc7\u82b1\u843c\u957f\u5ea6\uff0c\u82b1\u843c\u5bbd\u5ea6\uff0c\u82b1\u74e3\u957f\u5ea6\uff0c\u82b1\u74e3\u5bbd\u5ea64\u4e2a\u5c5e\u6027\u9884\u6d4b\u9e22\u5c3e\u82b1\u5349\u5c5e\u4e8e\uff08Setosa\uff0cVersicolour\uff0cVirginica\uff09\u4e09\u4e2a\u79cd\u7c7b\u4e2d\u7684\u54ea\u4e00\u7c7b\u3002<\/p>\n<\/blockquote>\n<p>\u7531\u6b64\uff0c\u6211\u4eec\u76f4\u63a5\u4f7f\u7528sklearn\u4e2d\u5f00\u6e90\u7684\u6570\u636e\u96c6\uff0c\u52a0\u8f7d\u5e76\u6253\u5370\u6570\u636e\u96c6\u7684\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-python\">from sklearn.datasets import load_iris\niris = load_iris()\n\n# \u7279\u5f81\u6570\u636e\nX = iris.data\n\n# \u76ee\u6807\u503c\ny = iris.target\n\nprint(&quot;\u7279\u5f81\u6570\u636e\uff1a&quot;)\nprint(X)\n\nprint(&quot;\\n\u76ee\u6807\u503c\uff1a&quot;)\nprint(y)<\/code><\/pre>\n<p>\u8fd0\u884c\u7ed3\u679c\uff1a<br \/>\n<a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716520739490.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716520739490.png\" alt=\"file\" \/><\/a><\/p>\n<p><a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716520767328.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716520767328.png\" alt=\"file\" \/><\/a><\/p>\n<p>\u5907\u6ce8\uff1a\u5982\u679csklearn\u4e0d\u80fd\u4f7f\u7528\uff0c\u9700\u8981\u5148\u7528pip install sklearn\u5b89\u88c5\u5bf9\u5e94\u7684\u7ec4\u4ef6\u5305\uff0c\u5177\u4f53\u65b9\u6cd5\u53ef\u4ee5\u89c1<a href=\"https:\/\/blog.csdn.net\/qq_63585949\/article\/details\/127542866\">Python sklearn\u5b9e\u73b0SVM\u9e22\u5c3e\u82b1\u5206\u7c7b<\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E7%AC%AC%E4%B8%89%E6%AD%A5%EF%BC%9A%E9%81%B4%E9%80%89%E7%AE%97%E6%B3%95%E5%AE%8C%E6%88%90%E8%BE%93%E5%85%A5%E5%88%B0%E8%BE%93%E5%87%BA%E7%9A%84%E6%98%A0%E5%B0%84\"><\/span>\u7b2c\u4e09\u6b65\uff1a\u9074\u9009\u7b97\u6cd5,\u5b8c\u6210\u8f93\u5165\u5230\u8f93\u51fa\u7684\u6620\u5c04<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"%E5%B8%B8%E8%A7%81%E5%88%86%E7%B1%BB%E7%AE%97%E6%B3%95\"><\/span>\u5e38\u89c1\u5206\u7c7b\u7b97\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>KNN\uff1aK\u7d27\u90bb\u7b97\u6cd5<\/li>\n<li>GNB\uff1a\u9ad8\u65af\u8d1d\u53f6\u65af<\/li>\n<li>DT\uff1a\u51b3\u7b56\u6811\u7b97\u6cd5<\/li>\n<li>SVM\uff1a\u652f\u6301\u5411\u91cf\u673a<\/li>\n<li>RF\uff1a\u968f\u673a\u68ee\u6797\u7b97\u6cd5<\/li>\n<li>\u96c6\u6210\u5b66\u4e60\u7b97\u6cd5<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u7b97\u6cd5\u90fd\u53ef\u4ee5\u8fdb\u884c\u5206\u7c7b\uff0c\u5728\u672c\u7ae0\u5b66\u4e60\u4e2d\u4e3b\u8981\u4f7f\u7528\u4e86KNN\u7b97\u6cd5\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E6%95%B0%E6%8D%AE%E5%88%87%E5%88%86\"><\/span>\u6570\u636e\u5207\u5206<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5728\u4f7f\u7528\u7b97\u6cd5\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u5c06\u6570\u636e\u96c6\u5212\u5206\u4e3a\u4e24\u90e8\u5206\uff1atrain\u548ctest\uff0ctrain\u7528\u6765\u8bad\u7ec3\u4f7f\u7528\uff0ctest\u6765\u8fdb\u884c\u6d4b\u8bd5\u9a8c\u8bc1\u8bad\u7ec3\u540e\u7684\u6a21\u578b\u3002<\/p>\n<p>\u5728sklearn\u4e2d\u6709train_test_split\u7684\u5e93\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5feb\u901f\u8fdb\u884c\u6570\u636e\u96c6\u7684\u5207\u5206\uff0c\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-python\">from sklearn.datasets import load_iris\n\n# \u52a0\u8f7d\u5f00\u6e90\u5e93\u4e2d\u7684iris\u6570\u636e\u96c6\nX,y = load_iris(return_X_y=True)\n\n# \u6570\u636e\u96c6\u5207\u5206\nfrom sklearn.model_selection import train_test_split\n\n# \u5207\u5206\u6570\u636e\u96c6\nX_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, \n                                                    shuffle=True, \n                                                    random_state=0) \n# test_size=0.2\u4ee3\u8868\u62ff20%\u7528\u4e8e\u6d4b\u8bd5\u96c6\n# shuffle=True \u4ee3\u8868\u6d17\u724c\uff0c\u5373\u5c06\u6837\u672c\u6253\u4e71\u987a\u5e8f,\n# \u4f8b\u5982\uff1a\u6837\u672cy\u7684\u6837\u672c\u662f\u6309\u7167\u987a\u5e8f0\u30011\u30012\u8fdb\u884c\u7ec4\u6210\n# \u4f7f\u7528shuffle\u4e4b\u540e\u8fd4\u56de\u7684y_train\u662f\u968f\u673a\u6253\u4e71\u7684\n# \u5907\u6ce8\uff1a\u6253\u4e71\u7684\u65f6\u5019\uff0cX\u548cy\u662f\u540c\u6b65\u8fdb\u884c\u7684\uff0c\u4f8b\u5982\u7b2c10\u4e2a\u6570\u636eX\u6253\u4e71\u5230\u6837\u672c\u6700\u540e\u4e00\u4e2a\uff0c\u90a3\u4e48\u540c\u6b65Y\u4e5f\u4f1a\u6253\u4e71\u5230\u6837\u672c\u6700\u540e\u4e00\u4e2a\n# \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6bcf\u6b21\u6267\u884c\u90fd\u662f\u968f\u673a\u7684\uff1b\u5982\u679c\u8bbe\u5b9arandom_state\u968f\u673a\u79cd\u5b50\u7684\u8bdd\uff0c\u90a3\u4e48\u968f\u673a\u662f\u53ef\u56de\u6eaf\u7684\u3002<\/code><\/pre>\n<p><a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716521200640.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716521200640.png\" alt=\"file\" \/><\/a><\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E6%A8%A1%E5%9E%8B%E8%AE%AD%E7%BB%83%E5%92%8C%E9%A2%84%E6%B5%8B\"><\/span>\u6a21\u578b\u8bad\u7ec3\u548c\u9884\u6d4b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-python\"># \u5f15\u5165\u4e00\u4e2a\u6a21\u578b\nfrom sklearn.neighbors import KNeighborsClassifier\n\n# 1,\u6784\u5efa\u6a21\u578b\nknn = KNeighborsClassifier()\n\n# 2,\u8bad\u7ec3\u6a21\u578b\nknn.fit(X=X_train, y=y_train)\n\n# 3, \u9884\u6d4b\uff0c\u5c06\u7ed3\u679c\u4fdd\u5b58\u5230y_pred\ny_pred = knn.predict(X=X_test)<\/code><\/pre>\n<p>\u67e5\u770bknn.predict\u8fd4\u56de\u7684y_pred\u7ed3\u679c<br \/>\n<a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716521428216.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716521428216.png\" alt=\"file\" \/><\/a><\/p>\n<p>\u7531\u6b64\uff0c\u6211\u4eec\u5b8c\u6210\u4e86Knn\u7b97\u6cd5\u4ece<code>\u52a0\u8f7d\u6570\u636e<\/code>\u2192<code>\u5207\u5206\u6570\u636e<\/code>\u2192<code>\u6a21\u578b\u6784\u5efa<\/code>\u2192<code>\u6a21\u578b\u8bad\u7ec3<\/code>\u2192<code>\u6a21\u578b\u9884\u6d4b<\/code>\u7684\u57fa\u672c\u4f7f\u7528\u8fc7\u7a0b\u3002<\/p>\n<p>\u9664\u6b64\u4e4b\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528\u51b3\u7b56\u6811\u548c\u5411\u91cf\u673a\u6765\u5b9e\u73b0\u4e0a\u8ff0\u5206\u7c7b\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-python\"># \u51b3\u7b56\u6811\u5206\u7c7b\u793a\u4f8b\nfrom sklearn.tree import DecisionTreeClassifier\n\n# 1, \u6784\u5efa\u6a21\u578b\ndtc = DecisionTreeClassifier()\n\n# 2, \u8bad\u7ec3\u6a21\u578b\ndtc.fit(X=X_train, y=y_train)\n\n# 3, \u9884\u6d4b\ny_pred2 = dtc.predict(X=X_test)\n\nacc = (y_pred2 == y_test).mean()\n\n# \u67e5\u770b\u51c6\u786e\u7387\nacc<\/code><\/pre>\n<pre><code class=\"language-python\"># \u5411\u91cf\u673a\u5206\u7c7b\u793a\u4f8b\nfrom sklearn.svm import SVC\n\n# 1, \u6784\u5efa\u6a21\u578b\nsvc = SVC()\n\n# 2, \u8bad\u7ec3\u6a21\u578b\nsvc.fit(X=X_train, y=y_train)\n\n# 3, \u9884\u6d4b\ny_pred3 = svc.predict(X_test)\n\nacc = (y_pred3 == y_test).mean()\n\n# \u67e5\u770b\u51c6\u786e\u7387\nacc<\/code><\/pre>\n<p>\u5907\u6ce8\uff1asklearn\u5b98\u7f51\u6709\u591a\u79cd\u5206\u7c7b\u7b97\u6cd5\uff0c\u5177\u4f53\u53ef\u4ee5\u67e5\u770b\u5b98\u7f51https:\/\/scikit-learn.org\/stable\/<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E7%AC%AC%E5%9B%9B%E6%AD%A5%EF%BC%9A%E9%83%A8%E7%BD%B2%E9%9B%86%E6%88%90\"><\/span>\u7b2c\u56db\u6b65\uff1a\u90e8\u7f72\u96c6\u6210<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u7531\u4e8e\u6a21\u578b\u6700\u7ec8\u662f\u9700\u8981\u90e8\u7f72\u5230\u751f\u4ea7\u73af\u5883\u53bb\u4f7f\u7528\u7684\uff0c\u6240\u4ee5\u5728\u90e8\u7f72\u96c6\u6210\u8fd9\u4e2a\u73af\u8282\uff0c\u4e3b\u8981\u5de5\u4f5c\u662f\u4e24\u90e8\u5206\uff1a<\/p>\n<ul>\n<li>\u5f00\u53d1\u73af\u5883\uff1a\u5e8f\u5217\u5316&#8211;&gt;\u8bad\u7ec3\u6a21\u578b\u5e76\u628a\u6a21\u578b\u6587\u4ef6\u4fdd\u5b58\u5230\u786c\u76d8\u4e0a<\/li>\n<li>\u751f\u4ea7\u73af\u5883\uff1a\u53cd\u5e8f\u5217\u5316&#8211;&gt;\u628a\u6a21\u578b\u4ece\u786c\u76d8\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u53bb\u4f7f\u7528<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"%E5%BA%8F%E5%88%97%E5%8C%96%E6%96%B9%E6%B3%95\"><\/span>\u5e8f\u5217\u5316\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5e8f\u5217\u5316\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528python\u5185\u7f6e\u7684\u4e00\u4e2a<code>joblib<\/code>\u7ec4\u4ef6\u7684<code>dump<\/code>\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002<\/p>\n<pre><code class=\"language-python\">import joblib\nfrom sklearn.neighbors import KNeighborsClassifier\nfrom sklearn.datasets import load_iris\nfrom sklearn.model_selection import train_test_split\n\n# \u52a0\u8f7d\u5f00\u6e90\u5e93\u4e2d\u7684iris\u6570\u636e\u96c6\nX,y = load_iris(return_X_y=True)\n\n# \u5207\u5206\u6570\u636e\u96c6\nX_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, \n                                                    shuffle=True, \n                                                    random_state=0) \n\n# 1,\u6784\u5efa\u6a21\u578b\nknn = KNeighborsClassifier()\n\n# 2,\u8bad\u7ec3\u6a21\u578b\nknn.fit(X=X_train, y=y_train)\n\n# 3,\u5c06knn\u5bf9\u8c61\u4fdd\u5b58\u5230\u786c\u76d8\u4e0a\njoblib.dump(value=knn, filename=&quot;knn.aura&quot;)<\/code><\/pre>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u4ee3\u7801\uff0c\u6211\u4eec\u5c06\u6784\u5efa\u7684\u6a21\u578b\u5bf9\u8c61knn\u8f6c\u50a8\u4e86\u4e00\u4efd\u4e8c\u8fdb\u5236\u6587\u4ef6\u5230\u672c\u5730\u78c1\u76d8\u4e0a\uff0c\u5176\u6587\u4ef6\u4e3aknn.aura<br \/>\n<a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716522269235.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716522269235.png\" alt=\"file\" \/><\/a><\/p>\n<p>\u5907\u6ce8\uff1a\u5982\u679c\u672c\u673a\u6ca1\u6709\u5b89\u88c5joblib\uff0c\u9700\u8981\u4f7f\u7528<code>pip install joblib<\/code>\u5b89\u88c5\u5bf9\u5e94\u7ec4\u4ef6<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E5%8F%8D%E5%BA%8F%E5%88%97%E5%8C%96%E6%96%B9%E6%B3%95\"><\/span>\u53cd\u5e8f\u5217\u5316\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5728\u751f\u6210\u73af\u5883\uff0c\u901a\u8fc7<code>joblib<\/code>\u7ec4\u4ef6\u7684<code>load<\/code>\u65b9\u6cd5\u6765\u52a0\u8f7d\u4e4b\u524d\u4fdd\u5b58\u597d\u7684\u6a21\u578b\u6587\u4ef6\u3002<\/p>\n<pre><code class=\"language-python\">import numpy as np\nimport joblib\n\nknn = joblib.load(filename=&quot;knn.aura&quot;)\n\n# \u56e0\u4e3a\u9884\u6d4b\u65f6\u662f\u6279\u91cf\u9884\u6d4b\uff0c\u6240\u4ee5\u5982\u679c\u6211\u4eec\u60f3\u6a21\u62df\u4e00\u4e2a\u6570\u636e\u96c6\u4f20\u5165\u65f6\uff0c\u9700\u8981\u5728\u4e24\u4fa7\u518d\u52a0\u4e0a\u4e00\u4e2a[],\u5c06\u6570\u636e\u6784\u5efa\u6210\u4e00\u4e2a\u4e8c\u7ef4\u6570\u7ec4\u624d\u80fd\u9884\u6d4b\u4f7f\u7528\u3002\n# \u5982\u679c\u4e0d\u6784\u5efa\u4e3a\u4e8c\u7ef4\u6570\u7ec4\uff0c\u76f4\u63a5\u4f20\u5165\u4e00\u7ef4\uff0c\u6a21\u578b\u4f1a\u62a5&quot;ValueError: Expected 2D array, got 1D array instead&quot;\u7684\u9519\u8bef\nX = np.array([[4.9, 3.1, 1.5, 0.1]])\n\n# \u5bf9\u6570\u636e4.9, 3.1, 1.5, 0.1\u8fdb\u884c\u9884\u6d4b\ny = knn.predict(X=X)\n\n# \u67e5\u770b\u9884\u6d4b\u7ed3\u679c\ny\n<\/code><\/pre>\n<p><a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716523040511.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716523040511.png\" alt=\"file\" \/><\/a><br \/>\n\u53ef\u4ee5\u770b\u5230\uff0c\u4e0a\u8ff04.9, 3.1, 1.5, 0.1\u7684\u9884\u6d4b\u7ed3\u679c\u4e3a0\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"KNN%E7%AE%97%E6%B3%95\"><\/span>KNN\u7b97\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"KNN%E7%AE%97%E6%B3%95%E7%AE%80%E8%BF%B0\"><\/span>KNN\u7b97\u6cd5\u7b80\u8ff0<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p><code>KNN\uff08K-Nearest Neighbor\uff09<\/code>(\u53c8\u79f0<code>k\u6700\u90bb\u8fd1\u7b97\u6cd5<\/code>)\u7b97\u6cd5\u662f\u673a\u5668\u5b66\u4e60\u7b97\u6cd5\u4e2d<strong>\u6700\u57fa\u7840<\/strong>\u3001<strong>\u6700\u7b80\u5355<\/strong>\u7684\u7b97\u6cd5\u4e4b\u4e00\u3002KNN\u901a\u8fc7\u6d4b\u91cf\u4e0d\u540c\u7279\u5f81\u503c\u4e4b\u95f4\u7684\u8ddd\u79bb\u6765\u8fdb\u884c\u5206\u7c7b\u3002<\/p>\n<\/li>\n<li>\n<p>KNN\u7b97\u6cd5\u662f\u4e00\u79cd\u975e\u5e38\u7279\u522b\u7684\u673a\u5668\u5b66\u4e60\u7b97\u6cd5\uff0c\u56e0\u4e3a\u5b83\u6ca1\u6709\u4e00\u822c\u610f\u4e49\u4e0a\u7684\u5b66\u4e60\u8fc7\u7a0b\u3002\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u662f<strong>\u5229\u7528\u8bad\u7ec3\u6570\u636e\u5bf9\u7279\u5f81\u5411\u91cf\u7a7a\u95f4\u8fdb\u884c\u5212\u5206<\/strong>\uff0c\u5e76\u5c06\u5212\u5206\u7ed3\u679c\u4f5c\u4e3a\u6700\u7ec8\u7b97\u6cd5\u6a21\u578b\u3002<\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"KNN%E7%AE%97%E6%B3%95%E6%A0%B8%E5%BF%83%E6%80%9D%E6%83%B3\"><\/span>KNN\u7b97\u6cd5\u6838\u5fc3\u601d\u60f3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>\u8fd1\u6731\u8005\u8d64\uff0c\u8fd1\u58a8\u8005\u9ed1<\/strong><\/p>\n<blockquote>\n<p>\u901a\u4fd7\u7684\u8bb2\uff1a\u5047\u8bbe\u8981\u5224\u65ad\u4e00\u4e2a\u4eba\u662f\u4ec0\u4e48\u6837\u7684\u4eba\uff0c\u90a3\u4e48\u5c31\u770b\u8fd9\u4e2a\u4eba\u8ddf\u4ec0\u4e48\u6837\u7684\u4eba\u5728\u4e00\u8d77\uff0c<code><code>\u8fd1\u90bb\u601d\u60f3<\/code><\/code>\u662f\u4eba\u5de5\u667a\u80fd\u7684\u7b2c\u4e00\u601d\u60f3\uff0c\u5b83\u8ba4\u4e3a\u597d\u4eba\u5806\u91cc\u7684\u4eba\u574f\u4e0d\u5230\u54ea\u513f\u53bb\uff0c\u574f\u4eba\u5806\u91cc\u7684\u4eba\u597d\u4e0d\u5230\u54ea\u513f\u53bb\uff0c\u662f\u4e00\u79cd\u7edf\u8ba1\u601d\u60f3\u3002<\/p>\n<\/blockquote>\n<h3><span class=\"ez-toc-section\" id=\"KNN%E6%8E%A8%E7%90%86%E8%BF%87%E7%A8%8B\"><\/span>KNN\u63a8\u7406\u8fc7\u7a0b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>K-Nearest Neighbors\u00a0\u53c8\u79f0<code>k\u6700\u90bb\u8fd1\u7b97\u6cd5<\/code>\uff0c\u6240\u4ee5\u6838\u5fc3\u5728\u4e8e<code>\u00a0K<\/code>  \u4e2a<code>\u6700\u8fd1<\/code>\u7684<code>\u90bb\u5c45<\/code><\/li>\n<\/ul>\n<p>\u5176\u63a8\u7406\u8fc7\u7a0b\u662f\uff1a(\u4ee5\u4e0a\u8ff0\u7ed9\u5b9a\u4e00\u6735\u82b1\uff0c\u5224\u5b9a\u5b83\u662f\u7b2c\u51e0\u7c7b\u4e3a\u4f8b)<\/p>\n<ol>\n<li>\u627e\u51fa\u8fd9\u6735\u82b1\u7684  K \u4e2a \u6700\u8fd1\u7684\u90bb\u5c45<\/li>\n<li>\u627e\u5230\u6700\u8fd1\u7684 K \u4e2a\u90bb\u5c45\uff0cK\u4e2a\u90bb\u5c45\u8fdb\u884c\u6295\u7968\uff0c\u9009\u51fa\u7c7b\u522b\u51fa\u73b0\u6b21\u6570\u6700\u591a\u7684\u7c7b\u522b<\/li>\n<\/ol>\n<p>\u5982\u4e0b\u56fe\u793a\u4f8b\uff1a<\/p>\n<ul>\n<li>\n<p>\u5f53\u9884\u6d4b\u4e00\u4e2a\u65b0\u6837\u672c\uff08\u56fe\u4e2d<font color=\"green\">\u7eff\u8272<\/font>\u7684\u70b9\uff09\u7684\u7c7b\u522b\u65f6\uff0c\u6839\u636e\u5b83\u8ddd\u79bb\u6700\u8fd1\u7684 K \u4e2a\u6837\u672c\u70b9\uff08\u5047\u8bbeK=3\uff09\u662f\u4ec0\u4e48\u7c7b\u522b\u6765\u5224\u65ad\u8be5\u65b0\u6837\u672c\u5c5e\u4e8e\u54ea\u4e2a\u7c7b\u522b\uff08\u591a\u6570\u6295\u7968\uff09\u3002<br \/>\n<a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/knn1.jpeg\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/knn1.jpeg\" alt=\"\" \/><\/a><\/p>\n<\/li>\n<li>\n<p>\u90a3\u4e48KNN\u7b97\u6cd5\u5c31\u4f1a\u627e\u5230\u4e0e\u5b83\u8ddd\u79bb\u6700\u8fd1\u7684\u4e09\u4e2a\u70b9\uff08\u8fd9\u91cc\u7528\u5706\u5708\u628a\u5b83\u5708\u8d77\u6765\u4e86\uff09\uff0c\u770b\u770b\u54ea\u79cd\u7c7b\u522b\u591a\u4e00\u4e9b\uff0c\u6bd4\u5982\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\u662f\u84dd\u8272\u4e09\u89d2\u5f62\u591a\u4e00\u4e9b\uff0c\u65b0\u6765\u7684\u7eff\u8272\u70b9\u5c31\u5f52\u7c7b\u5230\u84dd\u4e09\u89d2\u4e86\u3002<br \/>\n<a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/knn2.jpeg\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/knn2.jpeg\" alt=\"\" \/><\/a><\/p>\n<\/li>\n<li>\n<p>\u5f53K=5\u7684\u65f6\u5019\uff0c\u5224\u5b9a\u5c31\u53d8\u6210\u4e0d\u4e00\u6837\u4e86\u3002\u8fd9\u6b21\u53d8\u6210\u7ea2\u5706\u591a\u4e00\u4e9b\uff0c\u6240\u4ee5\u65b0\u6765\u7684\u7eff\u70b9\u88ab\u5f52\u7c7b\u6210\u7ea2\u5706\u3002\u4ece\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5c31\u80fd\u770b\u5f97\u51faK\u7684\u53d6\u503c\u662f\u5f88\u91cd\u8981\u7684\u3002<\/p>\n<\/li>\n<\/ul>\n<blockquote>\n<p>K\u503c\u662f\u8d85\u53c2\u6570\uff0c\u53ef\u4ee5\u7531\u4eba\u6765\u6307\u5b9a\u3002<\/p>\n<\/blockquote>\n<h2><span class=\"ez-toc-section\" id=\"KNN%E7%AE%97%E6%B3%95%E4%B8%AD%E7%9A%84%E7%9B%B8%E4%BC%BC%E5%BA%A6%E5%BA%A6%E9%87%8F\"><\/span>KNN\u7b97\u6cd5\u4e2d\u7684\u76f8\u4f3c\u5ea6\u5ea6\u91cf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5728KNN\u7b97\u6cd5\u4e2d\uff0c\u6709\u591a\u79cd\u8ba1\u7b97\u76f8\u4f3c\u5ea6\u7684\u65b9\u6cd5\uff0c\u4e00\u822c\u6765\u8bf4\u6709\uff1a<code>\u51e0\u4f55\u89c6\u89d2(\u6b27\u5f0f\u7a7a\u95f4)<\/code>\u548c<code>\u7ebf\u6027\u4ee3\u6570\u89c6\u89d2(\u4f59\u5f26\u76f8\u4f3c\u5ea6)<\/code>\u4e24\u79cd\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%87%A0%E4%BD%95%E8%A7%86%E8%A7%92%E6%AC%A7%E5%BC%8F%E7%A9%BA%E9%97%B4\"><\/span>\u51e0\u4f55\u89c6\u89d2(\u6b27\u5f0f\u7a7a\u95f4)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u8ddd\u79bb\u8ba1\u7b97\uff0c\u5373\u52fe\u4e09\u80a1\u56db\u5f26\u4e94\uff0c\u8ba1\u7b97\u4e24\u70b9\u4e4b\u95f4\u7684\u76f4\u7ebf\u8ddd\u79bb\uff0c<font color='red'>\u8ddd\u79bb\u8d8a\u77ed\u8d8a\u76f8\u4f3c<\/font>\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E6%AC%A7%E5%BC%8F%E8%B7%9D%E7%A6%BB%E8%AE%A1%E7%AE%97%E5%85%AC%E5%BC%8F\"><\/span>\u6b27\u5f0f\u8ddd\u79bb\u8ba1\u7b97\u516c\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5728<code>\u4e8c\u7ef4\u7a7a\u95f4<\/code>\u4e2d\uff0c\u4e24\u70b9\u4e4b\u95f4\u7684\u6b27\u5f0f\u8ddd\u79bb\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1a<\/p>\n<pre><code class=\"language-katex\">\\text{\u6b27\u5f0f\u8ddd\u79bb} = \\sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}<\/code><\/pre>\n<p>\u5728<code><code>\u591a\u7ef4\u7a7a\u95f4<\/code><\/code>\u4e2d\uff0c\u4e24\u70b9<\/p>\n<pre><code class=\"language-katex\">\\ P = (p_1, p_2, ..., p_n)<\/code><\/pre>\n<p>\u548c<\/p>\n<pre><code class=\"language-katex\">\\ Q = (q_1, q_2, ..., q_n)<\/code><\/pre>\n<p>\u4e4b\u95f4\u7684\u6b27\u5f0f\u8ddd\u79bb\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1a<\/p>\n<pre><code class=\"language-katex\">\\text{\u6b27\u5f0f\u8ddd\u79bb} = \\sqrt{\\sum_{i=1}^{n} (q_i - p_i)^2}<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"%E6%AC%A7%E5%BC%8F%E8%B7%9D%E7%A6%BB%E8%AE%A1%E7%AE%97%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0\"><\/span>\u6b27\u5f0f\u8ddd\u79bb\u8ba1\u7b97\u4ee3\u7801\u5b9e\u73b0<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-python\"># \u6b27\u5f0f\u8ddd\u79bb\u8ba1\u7b97\u793a\u4f8b\n\nimport numpy as np\n\na = np.array([2, 5])\nb = np.array([1, 8])\n\n# \u8ba1\u7b97a\u548cb\u4e4b\u95f4\u7684\u8ddd\u79bb\n# \u516c\u5f0f\u89e3\u6790\uff1a\n# a - b\uff1a\u76f8\u5f53\u4e8ex1 - x2\uff0cy1 - y2\n# (a - b) ** 2\uff1a\u76f8\u5f53\u4e8e(x1-x2)\u7684\u5e73\u65b9\u548c (y1-y2)\u7684\u5e73\u65b9\n# ((a - b) ** 2).sum()\uff1a\u76f8\u5f53\u4e8e(x1-x2)\u7684\u5e73\u65b9 + (y1-y2)\u7684\u5e73\u65b9\n# np.sqrt\u662f\u6c42\u5e73\u65b9\u6839\nc = np.sqrt((a - b)** 2 ).sum()\n\nc<\/code><\/pre>\n<p>\u8ba1\u7b97\u7ed3\u679c\uff1a<br \/>\n<a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716530152686.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716530152686.png\" alt=\"file\" \/><\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E7%BA%BF%E6%80%A7%E4%BB%A3%E6%95%B0%E8%A7%86%E8%A7%92%E5%90%91%E9%87%8F%E8%A7%86%E8%A7%92\"><\/span>\u7ebf\u6027\u4ee3\u6570\u89c6\u89d2(\u5411\u91cf\u89c6\u89d2)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u7ebf\u6027\u4ee3\u6570\u89c6\u89d2(\u5411\u91cf\u89c6\u89d2)\uff1a\u8ba1\u7b97\u4f59\u5f26\u76f8\u4f3c\u5ea6\uff0c<font color='red'>\u4f59\u5f26\u76f8\u4f3c\u5ea6\u8d8a\u9ad8\u8d8a\u76f8\u4f3c<\/font>\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E4%BD%99%E5%BC%A6%E7%9B%B8%E4%BC%BC%E5%BA%A6%E8%AE%A1%E7%AE%97%E5%85%AC%E5%BC%8F\"><\/span>\u4f59\u5f26\u76f8\u4f3c\u5ea6\u8ba1\u7b97\u516c\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u4e24\u4e2a\u5411\u91cf<code><code>A<\/code><code>\u548c<\/code><code>B<\/code><\/code>\u4e4b\u95f4\u7684\u4f59\u5f26\u76f8\u4f3c\u5ea6\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1a<\/p>\n<pre><code class=\"language-katex\">\\text{\u4f59\u5f26\u76f8\u4f3c\u5ea6} = \\frac{A \\cdot B}{\\|A\\| \\cdot \\|B\\|}<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<\/p>\n<pre><code class=\"language-katex\">A \\cdot B <\/code><\/pre>\n<p>\u8868\u793a\u5411\u91cf A \u548c B \u7684\u70b9\u79ef\uff08\u5185\u79ef\uff09\uff0c|A| \u548c |B| \u5206\u522b\u8868\u793a\u5411\u91cf A \u548c B \u7684\u8303\u6570\uff08\u6a21\u957f\uff09\u3002<\/p>\n<p>\u8be5\u8ba1\u7b97\u65b9\u6cd5\u7279\u522b\u9002\u7528\u4e8e\u5904\u7406\u9ad8\u7ef4\u7a00\u758f\u6570\u636e\u3002\u4f59\u5f26\u76f8\u4f3c\u5ea6\u8ba1\u7b97\u65b9\u6cd5\u8861\u91cf\u4e86\u4e24\u4e2a\u5411\u91cf\u4e4b\u95f4\u7684\u5939\u89d2\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f\u5b83\u4eec\u4e4b\u95f4\u7684\u8ddd\u79bb\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E4%BD%99%E5%BC%A6%E7%9B%B8%E4%BC%BC%E5%BA%A6%E8%AE%A1%E7%AE%97%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0\"><\/span>\u4f59\u5f26\u76f8\u4f3c\u5ea6\u8ba1\u7b97\u4ee3\u7801\u5b9e\u73b0<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-python\">import numpy as np\n\n# \u4f59\u5f26\u76f8\u4f3c\u5ea6\u8ba1\u7b97(\u8ba1\u7b97\u4e24\u4e2a\u5411\u91cf\u6c42\u5185\u79ef)\na = np.array([2, 5])\nb = np.array([1, 8])\n\n# \u8ba1\u7b97\u5185\u79ef\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\n\n# \u7b2c\u4e00\u79cd\uff1a\u8ba1\u7b97a\u548cb\u7684\u5185\u79ef\nret = (a * b).sum()\nprint(f&quot;\u7b2c\u4e00\u79cd\u8ba1\u7b97\u65b9\u6cd5\uff1a\u5185\u79ef= {ret}&quot; )\n\n# \u7b2c\u4e8c\u79cd\uff1a\u4f7f\u7528@\u662f\u5185\u79ef\u8ba1\u7b97\u65b9\u6cd5\nret = a @ b\nprint(f&quot;\u7b2c\u4e8c\u79cd\u8ba1\u7b97\u65b9\u6cd5\uff1a\u5185\u79ef= {ret}&quot;)\n\n# \u7b2c\u4e09\u79cd\uff1a\u4f7f\u7528np.dot\u8ba1\u7b97\u5185\u79ef\nret = np.dot(a, b)\nprint(f&quot;\u7b2c\u4e09\u79cd\u8ba1\u7b97\u65b9\u6cd5\uff1a\u5185\u79ef= {ret}&quot;)\n\n# \u8ba1\u7b97\u4f59\u5f26\u76f8\u4f3c\u5ea6\n# \u516c\u5f0f\u89e3\u6790\uff1a\n# a @ b:\u8ba1\u7b97a\u548cb\u7684\u5185\u79ef\n# np.linalg.norm(a):\u8ba1\u7b97a\u7684\u6a21\uff0c\u76f8\u5f53\u4e8enp.sqrt((a ** 2).sum())\ncosine_similarity = a @ b \/ np.linalg.norm(a) \/ np.linalg.norm(b)\ncosine_similarity<\/code><\/pre>\n<p>\u8fd0\u884c\u7ed3\u679c\uff1a<br \/>\n<a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716530879209.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716530879209.png\" alt=\"file\" \/><\/a><\/p>\n<p>\u5907\u6ce8\uff1a\u9664\u4e0a\u8ff0\u4e24\u79cd\u76f8\u4f3c\u5ea6\u5ea6\u91cf\u4e4b\u5916\uff0c\u8fd8\u6709<code><code>\u66fc\u54c8\u987f\u8ddd\u79bb<\/code><code>\u3001<\/code><code>\u6c49\u660e\u8ddd\u79bb<\/code><\/code>\u7b49\uff0c\u66f4\u591a\u7684\u5185\u5bb9\u53ef\u89c1<a href=\"https:\/\/blog.51cto.com\/u_15279692\/2953303\">\u300a\u4e00\u56fe\u770b\u904d9\u79cd\u8ddd\u79bb\u5ea6\u91cf\uff0c\u56fe\u6587\u5e76\u8302\uff0c\u8be6\u8ff0\u5e94\u7528\u573a\u666f\uff01\u300b<\/a>\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"KNN%E6%8E%A8%E7%90%86%E8%BF%87%E7%A8%8B%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%E4%B8%8D%E4%BD%BF%E7%94%A8sklearn%E5%86%85%E7%BD%AE%E5%87%BD%E6%95%B0\"><\/span>KNN\u63a8\u7406\u8fc7\u7a0b\u4ee3\u7801\u5b9e\u73b0(\u4e0d\u4f7f\u7528sklearn\u5185\u7f6e\u51fd\u6570)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<pre><code class=\"language-python\">import numpy as np\nfrom collections import Counter\n\nclass MyKNeighborsClassifier(object):\n    &quot;&quot;&quot;\n        \u81ea\u5b9a\u4e49KNN\u5206\u7c7b\u5668\n    &quot;&quot;&quot;\n    def __init__(self, n_neighbors=5):\n        &quot;&quot;&quot;\n        \u521d\u59cb\u5316\u65b9\u6cd5\uff1a\n            - \u8f93\u5165\uff1a\u8bbe\u7f6e\u8d85\u53c2(Hyper-Parameter\uff0c\u5373\u4eba\u4e3a\u6307\u5b9a\u7684\uff0c\u4e0d\u662f\u7cfb\u7edf\u5b66\u4e60\u7684\u53c2\u6570)\n            - \u8f93\u51fa\uff1a\u65e0\u8f93\u51fa\n        &quot;&quot;&quot;\n        # \u8d85\u53c2\u8bbe\u7f6e\n        self.n_neighbors = n_neighbors\n\n    def fit(self, X, y):\n        &quot;&quot;&quot;\n        \u8bad\u7ec3\u8fc7\u7a0b\n            - \u8f93\u5165\uff1a\n                - X\uff1a\u8bad\u7ec3\u96c6\u7684\u7279\u5f81\n                - y\uff1a\u8bad\u7ec3\u96c6\u7684\u6807\u7b7e\n        &quot;&quot;&quot;\n\n        # \u7c7b\u578b\u8f6c\u6362\n        X = np.array(X)\n        y = np.array(y)\n\n        self.X = X\n        self.y = y\n\n        # \u5f62\u72b6\u6821\u9a8c\n        # \u5982\u679cX\u4e0d\u662f\u4e8c\u7ef4\u6570\u7ec4\uff0c\u6216\u8005y\u4e0d\u662f\u4e00\u7ef4\uff0c\u6216\u8005x\u7684\u6837\u672c\u6570\u91cf\u4e0ey\u7684\u6837\u672c\u6570\u91cf\u4e0d\u540c\n        if X.ndim != 2 or y.ndim != 1 or X.shape[0] != y.shape[0]:\n            raise ValueError(&#039;\u5165\u53c2\u6709\u8bef&#039;)\n\n    def predict(self, X):\n        &quot;&quot;&quot;\n        \u9884\u6d4b\u8fc7\u7a0b\uff1a\n            - \u8f93\u5165\uff1a\n                - X\uff1a\u5f85\u9884\u6d4b\u7684\u6837\u672c\u7684\u7279\u5f81(\u6279\u91cf)\n            - \u8f93\u51fa\uff1a\n                - y\uff1a\u9884\u6d4b\u7684\u7c7b\u522b\n        &quot;&quot;&quot;\n\n        # \u5bf9X\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\n        X = np.array(X)\n\n        # \u5f62\u72b6\u6821\u9a8c\n        # \u5982\u679cX\u4e0d\u662f2\u4e2a\u7ef4\u5ea6\uff0c\u6216\u8005\u6700\u540e\u4e00\u4e2a\u7ef4\u5ea6\n        if X.ndim != 2 or X.shape[-1] != self.X.shape[-1]:\n            raise ValueError(&quot;\u5165\u53c2\u6709\u8bef&quot;)\n\n        # \u63a8\u7406\u8fc7\u7a0b\n        results = []\n\n        # \u4ece\u6837\u672c\u96c6self.X\u4e2d\u9010\u4e2a\u53d6\u51fa\u8fdb\u884c\u5904\u7406\n        for x in X:\n            # \u7b2c\u4e00\u6b65\uff1a\u627e K \u4e2a\u597d\u53cb(\u4f7f\u7528\u6b27\u5f0f\u8ddd\u79bb)\n            # \u51fd\u6570\u89e3\u6790\uff1a\n            # 1.\u6240\u6709\u7684\u6837\u672cself.X\u90fd\u51cf\u53bbx\n            # 2.\u7136\u540e\u6c42\u5e73\u65b9\u548c\u518d\u5f00\u6839\u53f7\uff0c\u8ba1\u7b97\u5f97\u5230\u6b27\u5f0f\u8ddd\u79bb\n            distances = np.sqrt(((self.X - x) ** 2).sum( axis= -1))\n\n            # \u7b2c\u4e8c\u6b65\uff1a\u5bf9 K \u4e2a\u597d\u53cb\u7684\u8fdb\u884c\u5012\u5e8f\u6392\u5e8f\n            # \u51fd\u6570\u89e3\u6790\uff1a\u4f7f\u7528np.argsort\u5f97\u5230\u6700\u8fd1\u597d\u53cb\u7684\u5e8f\u53f7\n            # \u7279\u522b\u6ce8\u610f\uff1a\u8fd9\u91cc\u6392\u5e8f\u4e0d\u662f\u6c42\u597d\u53cb\u7684\u8ddd\u79bb\uff0c\u800c\u662f\u6c42\u6700\u8fd1\u7684\u597d\u53cb\u662f\u8c01\n            idxes = np.argsort(distances)[:self.n_neighbors]            \n\n            # \u7b2c\u4e09\u6b65\uff1a\u53d6\u51fa\u597d\u53cb\u7684\u7c7b\u522b\n            labels = self.y[idxes]\n\n            # \u7b2c\u56db\u6b65\uff1a\u8ba1\u7b97\u51fa\u73b0\u6b21\u6570\u6700\u591a\u7684\u7c7b\u522b\n            # \u51fd\u6570\u5373\u7cfb\uff1a\u4f7f\u7528collections\u7684Counter\u53ef\u4ee5\u65b9\u4fbf\u5f97\u5230\u51fa\u73b0\u6b21\u6570\u6700\u591a\u7684\u7c7b\u522b\n            label = Counter(labels).most_common(1)[0][0]\n\n            # \u7b2c\u4e94\u6b65\uff1a\u5c06\u7c7b\u522b\u7ed3\u679c\u6dfb\u52a0\u5230results\u65b9\u4fbf\u8fd4\u56de\n            results.append(label)\n\n        return np.array(results)\n\n# 1, \u6784\u5efa\u6a21\u578b\nmy_knn = MyKNeighborsClassifier()\n\n# 2, \u8bad\u7ec3\nmy_knn.fit(X=X_train, y=y_train)\n\n# 3, \u9884\u6d4b\ny_pred = my_knn.predict(X=X_test)\n\n# 4, \u8ba1\u7b97\u51c6\u786e\u7387\nacc = (y_pred == y_test).mean()\n\n# 5, \u8f93\u51fa\u51c6\u786e\u7387\nacc<\/code><\/pre>\n<p>\u8fd0\u884c\u7ed3\u679c\uff1a<br \/>\n<a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716532055507.png\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/05\/image-1716532055507.png\" alt=\"file\" \/><\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%86%85%E5%AE%B9%E5%B0%8F%E7%BB%93%EF%BC%9A\"><\/span>\u5185\u5bb9\u5c0f\u7ed3\uff1a<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>\n<p>\u673a\u5668\u5b66\u4e60\u7684\u5e94\u7528\u57fa\u672c\u6d41\u7a0b\uff1a<code>\u5206\u6790\u95ee\u9898<\/code>\u2192<code>\u91c7\u96c6\u6570\u636e<\/code>\u2192<code>\u9074\u9009\u7b97\u6cd5<\/code>\u2192<code>\u90e8\u7f72\u96c6\u6210<\/code><\/p>\n<\/li>\n<li>\n<p>\u5206\u6790\u95ee\u9898\uff1a<\/p>\n<ul>\n<li>\u8981\u8003\u8651\u8f93\u5165\u8f93\u51fa\u662f\u4ec0\u4e48\uff0c\u8f93\u5165\u8f93\u51fa\u8981\u6570\u5b57\u5316\u5b9e\u4f53<\/li>\n<li>\u6570\u5b57\u5316\u5b9e\u4f53\u4e00\u822c\u662f\u901a\u8fc7\u5b9e\u4f53\u7684\u7279\u5f81(\u6216\u5c5e\u6027)\u6765\u523b\u753b\uff0c\u5177\u4f53\u9009\u62e9\u7279\u5f81\u8981\u6839\u636e\u4e1a\u52a1\u573a\u666f\u6765\u5b9a\u4e49<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u91c7\u96c6\u6570\u636e\uff1a<\/p>\n<ul>\n<li>\u91c7\u96c6\u540e\u7684\u6570\u636e\uff0c\u53ef\u4ee5\u901a\u8fc7train_test_split\u8fdb\u884c\u6570\u636e\u5207\u5206\u4e3a\u8bad\u7ec3\u6570\u636e\u548c\u6d4b\u8bd5\u6570\u636e<\/li>\n<li>\u6d4b\u8bd5\u6570\u636e\u4e3b\u8981\u7528\u6765\u9a8c\u8bc1\uff0c\u4e0d\u80fd\u7528\u4f5c\u8bad\u7ec3<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u9074\u9009\u7b97\u6cd5\uff1a<\/p>\n<ul>\n<li>\u5206\u7c7b\u573a\u666f\u4e0b\u6709\u591a\u79cd\u7b97\u6cd5\uff0c\u5e38\u7528\u7684\u6709Knn<\/li>\n<li>\u4f7f\u7528\u7b97\u6cd5\u7684\u4e09\u4e2a\u57fa\u672c\u6b65\u9aa4\uff1a\u6784\u5efa\u6a21\u578b\u3001\u8bad\u7ec3\u6a21\u578b(fit)\u3001\u9884\u6d4b(predict)<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u90e8\u7f72\u96c6\u6210\uff1a<\/p>\n<ul>\n<li>\u90e8\u7f72\u96c6\u6210\u672c\u8d28\u4e0a\u5c31\u662f\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u8fc7\u7a0b<\/li>\n<li>\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u65f6\u53ef\u4ee5\u4f7f\u7528joblib\u7684dump\u548cload\u65b9\u6cd5<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>KNN\u7b97\u6cd5\u4e5f\u53ebK\u6700\u8fd1\u90bb\u7b97\u6cd5<\/p>\n<\/li>\n<li>\n<p>KNN\u7b97\u6cd5\u6838\u5fc3\u601d\u60f3\uff1a\u8fd1\u6731\u8005\u8d64\uff0c\u8fd1\u58a8\u8005\u9ed1<\/p>\n<\/li>\n<li>\n<p>KNN\u7b97\u6cd5\u63a8\u7406\u8fc7\u7a0b\uff1a\u627e\u51fa K \u4e2a \u6700\u8fd1\u7684\u90bb\u5c45 \u2192 K\u4e2a\u90bb\u5c45\u8fdb\u884c\u6295\u7968\uff0c\u9009\u51fa\u7c7b\u522b\u51fa\u73b0\u6b21\u6570\u6700\u591a\u7684\u7c7b\u522b<\/p>\n<\/li>\n<li>\n<p>KNN\u7684\u76f8\u4f3c\u5ea6\u5ea6\u91cf\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u51e0\u4f55\u89c6\u89d2\u662f\u6b27\u5f0f\u8ddd\u79bb\uff0c\u5411\u91cf\u89c6\u89d2\u662f\u4f59\u5f26\u76f8\u4f3c\u5ea6<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"%E5%8F%82%E8%80%83%E8%B5%84%E6%96%99%EF%BC%9A\"><\/span>\u53c2\u8003\u8d44\u6599\uff1a<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><a href=\"https:\/\/blog.csdn.net\/m0_74405427\/article\/details\/133714384\">\u300aKNN\u7b97\u6cd5\uff08k\u8fd1\u90bb\u7b97\u6cd5\uff09\u539f\u7406\u53ca\u603b\u7ed3\u300b<\/a><\/li>\n<li><a href=\"https:\/\/blog.csdn.net\/Tonywu2018\/article\/details\/84244231\">\u300akNN(k\u8fd1\u90bb\u6cd5)\u300b<\/a><\/li>\n<li><a href=\"https:\/\/blog.csdn.net\/qq_63585949\/article\/details\/127542866\">\u300aPython sklearn\u5b9e\u73b0SVM\u9e22\u5c3e\u82b1\u5206\u7c7b\u300b<\/a><\/li>\n<li><a href=\"https:\/\/blog.51cto.com\/u_15279692\/2953303\">\u300a\u4e00\u56fe\u770b\u904d9\u79cd\u8ddd\u79bb\u5ea6\u91cf\uff0c\u56fe\u6587\u5e76\u8302\uff0c\u8be6\u8ff0\u5e94\u7528\u573a\u666f\uff01\u300b<\/a><\/li>\n<\/ul>\n<p align=\"center\">\u6b22\u8fce\u5173\u6ce8\u516c\u4f17\u53f7\u4ee5\u83b7\u5f97\u6700\u65b0\u7684\u6587\u7ae0\u548c\u65b0\u95fb<\/p>\n<p><a href=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/09\/\u626b\u7801_\u641c\u7d22\u8054\u5408\u4f20\u64ad\u6837\u5f0f-\u767d\u8272\u7248.bmp\" data-fancybox=\"images\" data-fancybox=\"gallery\"><img decoding=\"async\" src=\"https:\/\/17aitech.com\/wp-content\/uploads\/2024\/09\/\u626b\u7801_\u641c\u7d22\u8054\u5408\u4f20\u64ad\u6837\u5f0f-\u767d\u8272\u7248.bmp\" alt=\"\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u4e0a\u8282\u8bfe\u4e3b\u8981\u5b66\u4e60\u4e86\u673a\u5668\u5b66\u4e60\u7684\u57fa\u672c\u9879\u76ee [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1858,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[28],"tags":[55],"class_list":["post-1856","post","type-post","status-publish","format-aside","has-post-thumbnail","hentry","category-blog","tag-55","post_format-post-format-aside"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u3010\u8bfe\u7a0b\u603b\u7ed3\u3011Day2\uff1aKNN\u7b97\u6cd5 - \u4e00\u8d77AI\u6280\u672f<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/17aitech.com\/?p=1856\" \/>\n<script type=\"application\/ld+json\" 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