{"id":2617,"date":"2021-01-23T22:30:23","date_gmt":"2021-01-23T13:30:23","guid":{"rendered":"https:\/\/obenkyolab.com\/?p=2617"},"modified":"2022-01-29T00:39:15","modified_gmt":"2022-01-28T15:39:15","slug":"%e3%80%90python%e3%80%91k-nn%e3%81%ab%e3%82%88%e3%82%8b%e5%88%86%e9%a1%9e%e3%83%a2%e3%83%87%e3%83%ab","status":"publish","type":"post","link":"https:\/\/obenkyolab.com\/?p=2617","title":{"rendered":"\u3010Python\u3011K-NN\u306b\u3088\u308b\u5206\u985e\u30e2\u30c7\u30eb"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/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 class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/obenkyolab.com\/?p=2617\/#%E6%A6%82%E8%A6%81\" >\u6982\u8981<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/obenkyolab.com\/?p=2617\/#%E4%BD%BF%E7%94%A8%E3%81%99%E3%82%8B%E3%83%87%E3%83%BC%E3%82%BF\" >\u4f7f\u7528\u3059\u308b\u30c7\u30fc\u30bf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/obenkyolab.com\/?p=2617\/#%E3%82%BD%E3%83%BC%E3%82%B9%E3%82%B3%E3%83%BC%E3%83%89\" >\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/obenkyolab.com\/?p=2617\/#%E5%8B%89%E5%BC%B7%E3%81%AB%E3%81%AA%E3%81%A3%E3%81%9F%E3%81%93%E3%81%A8\" >\u52c9\u5f37\u306b\u306a\u3063\u305f\u3053\u3068<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"\u6982\u8981\"><span class=\"ez-toc-section\" id=\"%E6%A6%82%E8%A6%81\"><\/span>\u6982\u8981<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Python\u306e\u6a5f\u68b0\u5b66\u7fd2\u7528\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u3044\u3048\u3070scikit-learn\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u4eca\u56de\u306f\u3053\u306escikit-learn\u306e\u306a\u304b\u3067\u3082\u5206\u985e\u554f\u984c\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308bK-NN\u306e\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u5206\u985e\u554f\u984c\u3092\u884c\u3046\u65b9\u6cd5\u306b\u3064\u3044\u3066\u7c21\u5358\u306b\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u4f7f\u7528\u3059\u308b\u30c7\u30fc\u30bf\"><span class=\"ez-toc-section\" id=\"%E4%BD%BF%E7%94%A8%E3%81%99%E3%82%8B%E3%83%87%E3%83%BC%E3%82%BF\"><\/span>\u4f7f\u7528\u3059\u308b\u30c7\u30fc\u30bf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u30c7\u30fc\u30bf\u5206\u6790\u306a\u3069\u306e\u30b3\u30f3\u30da\u306a\u3069\u3067\u6709\u540d\u306aKaggle\u3067\u3059\u304c\u3001\u30d5\u30ea\u30fc\u3067\u4f7f\u7528\u3067\u304d\u308b\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u304c\u3044\u304f\u3064\u304b\u63b2\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4eca\u56de\u306f\u3053\u306eKaggle\u306e\u4e2d\u3067Open Database License\u3068\u3057\u3066\u5229\u7528\u53ef\u80fd\u306a\u4ee5\u4e0b\u306e\u3092\u30c7\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3066\u3084\u3063\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<p><span style=\"text-decoration: underline;\">\u30cd\u30c3\u30c8\u5e83\u544a\u3068\u8cfc\u8cb7\u5b9f\u7e3e\u306e\u95a2\u4fc2\u306e\u30c7\u30fc\u30bf<\/span><\/p>\n\n\n\n<p><a href=\"https:\/\/www.kaggle.com\/dragonheir\/logistic-regression?select=Social_Network_Ads.csv\">https:\/\/www.kaggle.com\/dragonheir\/logistic-regression?select=Social_Network_Ads.csv<\/a><\/p>\n\n\n\n<p class=\"has-cyan-bluish-gray-background-color has-background\">License : https:\/\/opendatacommons.org\/licenses\/odbl\/1-0\/<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\"><span class=\"ez-toc-section\" id=\"%E3%82%BD%E3%83%BC%E3%82%B9%E3%82%B3%E3%83%BC%E3%83%89\"><\/span>\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u5b9f\u969b\u306e\u5206\u985e\u554f\u984c\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code># \u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30a4\u30f3\u30dd\u30fc\u30c8\nimport numpy as np\nimport pandas as pd\nfrom sklearn.neighbors import KNeighborsClassifier\nfrom sklearn.model_selection import train_test_split\nfrom sklearn.preprocessing import LabelEncoder\nfrom sklearn.preprocessing import MinMaxScaler\n\n# \u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306e\u8aad\u307f\u8fbc\u307f\ndf = pd.read_csv(&quot;Social_Network_Ads.csv&quot;)\n\n# \u30e9\u30d9\u30eb\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u51e6\u7406\nle=LabelEncoder()\ndf[&#39;Gender&#39;]=le.fit(df[&#39;Gender&#39;]).transform(df[&#39;Gender&#39;])\n\n# \u6b63\u898f\u5316\nscaler = MinMaxScaler()\ndf.loc[:,:]  = scaler.fit_transform(df)\ndf.head()\n\n# \u7279\u5fb4\u91cf\u3068\u76ee\u7684\u5909\u6570\u306e\u9078\u5b9a\nX = df[[&quot;Gender&quot;,&quot;Age&quot;, &quot;EstimatedSalary&quot;]]\ny  = df[&quot;Purchased&quot;]\n\n# \u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u5206\u5272\nX_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2)\n\n# KNN\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5b9a\u7fa9\nknn = KNeighborsClassifier(n_neighbors=6)\n\n# \u30e2\u30c7\u30ebfit\nknn.fit(X,y)\n\n#\u30b9\u30b3\u30a2\u8a08\u7b97\nscore = format(knn.score(X_test, y_test))\nprint(&#39;\u6b63\u89e3\u7387:&#39;, score)<\/code><\/pre><\/div>\n\n\n\n<p>\u6b63\u89e3\u7387: 0.9375<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u52c9\u5f37\u306b\u306a\u3063\u305f\u3053\u3068\"><span class=\"ez-toc-section\" id=\"%E5%8B%89%E5%BC%B7%E3%81%AB%E3%81%AA%E3%81%A3%E3%81%9F%E3%81%93%E3%81%A8\"><\/span>\u52c9\u5f37\u306b\u306a\u3063\u305f\u3053\u3068<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6700\u521d\u6b63\u89e3\u7387\u304c\u4f4e\u3081\u3060\u3063\u305f\u304c\u3001\u6b63\u898f\u5316\u3057\u305f\u3089\u3044\u3044\u611f\u3058\u306e\u6b63\u89e3\u7387\u304c\u51fa\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 Python\u306e\u6a5f\u68b0\u5b66\u7fd2\u7528\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u3044\u3048\u3070scikit-lea&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":1218,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"ja","_original_post":"https:\/\/obenkyolab.com\/?p=2617","footnotes":""},"categories":[7],"tags":[],"class_list":["post-2617","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","ja"],"_links":{"self":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts\/2617","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2617"}],"version-history":[{"count":8,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts\/2617\/revisions"}],"predecessor-version":[{"id":4739,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts\/2617\/revisions\/4739"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/media\/1218"}],"wp:attachment":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2617"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2617"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2617"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}