{"id":88423,"date":"2019-03-19T23:43:20","date_gmt":"2019-03-19T14:43:20","guid":{"rendered":"https:\/\/www.sejuku.net\/blog\/?p=88423"},"modified":"2024-05-06T11:54:53","modified_gmt":"2024-05-06T02:54:53","slug":"88423","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/88423","title":{"rendered":"Python\u3068sklearn\u3067\u624b\u8efd\u306b\u4e88\u6e2c\u30e2\u30c7\u30eb\u4f5c\u6210\u306e\u6d41\u308c\u3092\u611f\u3058\u3088\u3046"},"content":{"rendered":"\n<p><div class=\"box_voice\">Python\u3067\u6a5f\u68b0\u5b66\u7fd2\u304c\u3084\u3063\u3066\u307f\u305f\u3044<br>Scikit-learn\u3092\u4f7f\u3063\u3066\u57fa\u672c\u7684\u306a\u4e88\u6e2c\u554f\u984c\u306e\u6d41\u308c\u3092\u3064\u304b\u307f\u305f\u3044<\/div><\/p>\n\n\n\n<p>Python\u304c\u6d41\u884c\u3063\u3066\u3044\u308b\u6628\u4eca\u3001Scikit-learn\u3084DeepLearning\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3063\u3066\u307f\u305f\u3044\u3068\u601d\u3063\u3066\u3044\u308b\u65b9\u3001\u591a\u3044\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n\n\n\n<p>\u3053\u3093\u306b\u3061\u306f\u3001\u30e9\u30a4\u30bf\u30fc\u306e\u30d5\u30af\u30ed\u30a6\u3067\u3059\u3002Python\u306e\u30a4\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc\u3092\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<strong>\u6a5f\u68b0\u5b66\u7fd2\u30e9\u30a4\u30d6\u30e9\u30ea\u300cScikit-learn\u300d<\/strong>\uff08skleran\uff09\u3092\u4f7f\u3063\u3066\u3001<strong><span style=\"color: #008000;\">\u30c7\u30fc\u30bf\u306e\u4e88\u6e2c\u554f\u984c<\/span><\/strong>\u306b\u30c1\u30e3\u30ec\u30f3\u30b8\u3059\u308b\u6d41\u308c\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u89e3\u6790\u306b\u4f7f\u3046\u30e9\u30a4\u30d6\u30e9\u30ea\u306fsklearn\u3060\u3051\u306a\u306e\u3067\uff08Deep Learning\u306f\u89e6\u308a\u307e\u305b\u3093\uff09\u3001\u624b\u8efd\u306b\u59cb\u3081\u3089\u308c\u308b\u3068\u601d\u3044\u307e\u3059\u3088\uff01<\/p>\n\n\n\n<p><b>\u3053\u306e\u8a18\u4e8b\u306f\u3053\u3093\u306a\u4eba\u306e\u305f\u3081\u306b\u66f8\u304d\u307e\u3057\u305f\u3002<\/b><br><div class=\"box01\"><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Python\u3067\u6a5f\u68b0\u5b66\u7fd2\u306b\u6311\u6226\u3057\u305f\u3044<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u3092\u96c6\u3081\u308b\u3068\u3053\u308d\u304b\u3089\u6700\u5f8c\u307e\u3067\u306e\u6d41\u308c\u304c\u77e5\u308a\u305f\u3044<\/li>\n<\/ul>\n\n\n<\/div>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3092\u8aad\u3080\u524d\u306b\u3001Python\u304c\u3069\u3093\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306a\u306e\u304b\u3092\u304a\u3055\u3089\u3044\u3057\u3066\u304a\u304d\u305f\u3044\u4eba\u306f\u6b21\u306e\u8a18\u4e8b\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p>\u2192&nbsp;<a href=\"https:\/\/www.sejuku.net\/blog\/7720\">Python\u3068\u306f\uff1f\u7279\u5fb4\u3084\u3067\u304d\u308b\u3053\u3068\u3001\u6d3b\u7528\u4f8b\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u7c21\u5358\u306b\u89e3\u8aac<\/a><\/p>\n\n\n\n<p>\u306a\u304a\u3001\u305d\u306e\u4ed6\u306ePython\u306e\u8a18\u4e8b\u306b\u3064\u3044\u3066\u306f<a href=\"https:\/\/www.sejuku.net\/blog\/147190\" target=\"_blank\" rel=\"noopener\">\u3053\u3061\u3089<\/a>\u306b\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9f\u9a13\u76ee\u7684<\/h2>\n\n\n\n<p>Boston house-prices (\u30dc\u30b9\u30c8\u30f3\u5e02\u306e\u4f4f\u5b85\u4fa1\u683c)\u30c7\u30fc\u30bf\u3092\u4f7f\u3044\u3001Scikit-learn\u306e<b>\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u56de\u5e30\u3067\u4f4f\u5b85\u4fa1\u683c\u3092\u4e88\u6e2c<\/b>\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;\u5b9f\u9a13\u306e\u524d\u6e96\u5099<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u30e9\u30a4\u30d6\u30e9\u30ea\u306eimport<\/h3>\n\n\n\n<p>\u307e\u305a\u306f\u5fc5\u8981\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"># \u8a08\u7b97\u3067\u4f7f\u3046\u304b\u3082\u3057\u308c\u306a\u3044NumPy\nimport numpy as np\n# \u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u3092\u4f7f\u3046\u305f\u3081\u306bPandas\nimport pandas as pd\n\n# \u53ef\u8996\u5316\u30e9\u30a4\u30d6\u30e9\u30ea\nimport matplotlib.pyplot as plt\nimport seaborn as sns\nsns.set()\n# \u3082\u3057\u3082Jupyter notebook\u3067\u4f7f\u3046\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u304c\u5fc5\u8981\n%matplotlib inline<\/pre>\n\n\n\n<p>\u6b21\u306bscikit-learn\u95a2\u4fc2\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"># \u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\nfrom sklearn import datasets\n# \u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u56de\u5e30\u306e\u30af\u30e9\u30b9\u3092RFR\u3068\u3044\u3046\u3042\u3060\u540d\u3092\u4ed8\u3051\u3066import\nfrom sklearn.ensemble import RandomForestRegressor  as RFR\n \n# \u6559\u5e2b\u30c7\u30fc\u30bf\u3068\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306b\u5206\u5272\u3057\u3066\u304f\u308c\u308b\nfrom sklearn.model_selection import train_test_split\n\n# \u5e73\u5747\u4e8c\u4e57\u8aa4\u5dee\u3092\u8a08\u7b97\u3059\u308b\u95a2\u6570\nfrom sklearn.metrics import mean_squared_error\n\n# \u3082\u3057\u30d1\u30e9\u30e1\u30fc\u30bf\u63a2\u7d22\u304c\u3057\u305f\u3044\u5834\u5408\u306f\u4ee5\u4e0b\u3082import\nfrom sklearn.model_selection import GridSearchCV\n\n# \u3082\u3057\u30c7\u30fc\u30bf\u306e\u6a19\u6e96\u5316\u304c\u3057\u305f\u3044\u5834\u5408\u306f\u4ee5\u4e0b\u3082import\nfrom sklearn.preprocessing import StandardScaler<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f<\/h3>\n\n\n\n<p>\u56de\u5e30\u554f\u984c\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u306b\u3088\u304f\u4f7f\u308f\u308c\u308b\u30dc\u30b9\u30c8\u30f3\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002\u30dc\u30b9\u30c8\u30f3\u30c7\u30fc\u30bf\u306e\u8a73\u3057\u3044\u60c5\u5831\u306f<a href=\"https:\/\/pythondatascience.plavox.info\/scikit-learn\/scikit-learn%E3%81%AB%E4%BB%98%E5%B1%9E%E3%81%97%E3%81%A6%E3%81%84%E3%82%8B%E3%83%87%E3%83%BC%E3%82%BF%E3%82%BB%E3%83%83%E3%83%88\">scikit-learn\u306b\u4ed8\u5c5e\u3057\u3066\u3044\u308b\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8<\/a>\u3092\u8aad\u3080\u306e\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u3053\u3067\u306f\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u8fbc\u3093\u3067\u304b\u3089\u3001<span style=\"color: #008000;\"><strong>train_test_split<\/strong><\/span>\u3067<strong>\u6559\u5e2b\u30c7\u30fc\u30bf\u3068\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306b\u5206\u5272<\/strong>\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"># \u30dc\u30b9\u30c8\u30f3\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f\nboston = datasets.load_boston() \n \n# \u6559\u5e2b\u30c7\u30fc\u30bf\u3068\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306b\u5206\u5272\ntrain_data, test_data, train_target, test_target \\\n= train_test_split(boston.data, boston.target, test_size=0.2)<\/pre>\n\n\n\n<p>\u8aad\u307f\u8fbc\u3093\u3060\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u306b\u3057\u3066\u8868\u793a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u3059\u3079\u3066\u3092\u8868\u793a\u3059\u308b\u3068\u81a8\u5927\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u5148\u982d\u306e10\u884c\u3060\u3051\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"># \u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u5316 \ntrain_df = pd.DataFrame(train_data, columns=boston.feature_names)\n\n# \u4e0a\u304b\u308910\u884c\u3092\u8868\u793a\ntrain_df.head(10)<\/pre>\n\n\n<div class=\"wp-block-image wp-image-89472 size-large\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"640\" height=\"316\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/fdf39d05eb9d2da3605511e6a3d38c3d-640x316.png\" alt=\"\" class=\"wp-image-89472\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/fdf39d05eb9d2da3605511e6a3d38c3d-640x316.png 640w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/fdf39d05eb9d2da3605511e6a3d38c3d-150x74.png 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/fdf39d05eb9d2da3605511e6a3d38c3d-300x148.png 300w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/fdf39d05eb9d2da3605511e6a3d38c3d.png 661w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><figcaption class=\"wp-element-caption\">\u8aad\u307f\u8fbc\u3093\u3060\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0<\/figcaption><\/figure>\n<\/div>\n\n\n<pre class=\"wp-block-preformatted\"># \u4e88\u6e2c\u3057\u305f\u3044\u5024\ntrain_df[\"MEDV\"] = train_target\n\ntrain_df.head()<\/pre>\n\n\n<div class=\"wp-block-image wp-image-89473 size-large\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"640\" height=\"166\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/a0c3a2df560d0827445da4d37da6cce2-640x166.png\" alt=\"\" class=\"wp-image-89473\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/a0c3a2df560d0827445da4d37da6cce2-640x166.png 640w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/a0c3a2df560d0827445da4d37da6cce2-150x39.png 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/a0c3a2df560d0827445da4d37da6cce2-300x78.png 300w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/a0c3a2df560d0827445da4d37da6cce2.png 685w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><figcaption class=\"wp-element-caption\">\u4e88\u6e2c\u3057\u305f\u3044\u5024\u3092\u8ffd\u52a0\u3057\u305f\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0<\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u306e\u30c1\u30a7\u30c3\u30af<\/h3>\n\n\n\n<p>\u307e\u305a\u306f<strong>\u30c7\u30fc\u30bf\u306e\u500b\u6570<\/strong>\u3068\u3001<strong>\u3069\u3093\u306a\u30c7\u30fc\u30bf\u578b\u3092\u3082\u3063\u3066\u3044\u308b\u306e\u304b\u3092\u78ba\u8a8d<\/strong>\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">train_df.info()<\/pre>\n\n\n\n<p>[\u51fa\u529b\u7d50\u679c]<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">&lt;class 'pandas.core.frame.DataFrame'&gt;\nRangeIndex: 404 entries, 0 to 403\nData columns (total 14 columns):\nCRIM       404 non-null float64\nZN         404 non-null float64\nINDUS      404 non-null float64\nCHAS       404 non-null float64\nNOX        404 non-null float64\nRM         404 non-null float64\nAGE        404 non-null float64\nDIS        404 non-null float64\nRAD        404 non-null float64\nTAX        404 non-null float64\nPTRATIO    404 non-null float64\nB          404 non-null float64\nLSTAT      404 non-null float64\nMEDV       404 non-null float64\ndtypes: float64(14)\nmemory usage: 44.3 KB<\/pre>\n\n\n\n<p>\u3055\u3066\u3001\u8aad\u307f\u8fbc\u3093\u3060\u30c7\u30fc\u30bf\u306b\u6b20\u640d\u5024\u304c\u3042\u3063\u305f\u3089\u8a08\u7b97\u304c\u304a\u304b\u3057\u304f\u306a\u308a\u307e\u3059\u3002\u306a\u306e\u3067<strong>isnull\u30e1\u30bd\u30c3\u30c9\u3067\u6b20\u640d\u5024\u306e\u6570\u3092\u6570\u3048\u3066\u307f\u307e\u3057\u3087\u3046<\/strong>\u3002<\/p>\n\n\n\n<p>\u3082\u3057\u3082\u6b20\u640d\u5024\u304c\u3042\u3063\u305f\u3089\u3001\u3053\u308c\u3092\u5225\u306e\u6570\u5b57\u3067\u7f6e\u63db\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"># null\uff08None\uff09\u304c\u3042\u308c\u30701\u4ee5\u4e0a\u306e\u5024\u306b\u306a\u308a\u307e\u3059\u3002\ntrain_df.isnull().sum()<\/pre>\n\n\n\n<p>[\u51fa\u529b\u7d50\u679c]<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">CRIM       0\nZN         0\nINDUS      0\nCHAS       0\nNOX        0\nRM         0\nAGE        0\nDIS        0\nRAD        0\nTAX        0\nPTRATIO    0\nB          0\nLSTAT      0\nMEDV       0\ndtype: int64<\/pre>\n\n\n\n<p>\u3053\u3053\u3067\u306f\u6b20\u640d\u306f\u7121\u3044\u3053\u3068\u304c\u308f\u304b\u3063\u305f\u306e\u3067\u3001\u6b21\u306b\u9032\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u7d71\u8a08\u91cf\u3092\u8868\u793a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u5b9f\u306fDataFrame\u306b\u306f<span style=\"color: #008000;\"><strong>describe<\/strong><\/span>\u3068\u3044\u3046\u4fbf\u5229\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308b\u306e\u3067\u3001\u30b3\u30ec\u3092\u4f7f\u3046\u3053\u3068\u3067<strong>DataFrame\u306e\u7d71\u8a08\u91cf\u3092\u4e00\u6c17\u306b\u8868\u793a<\/strong>\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"># \u7d71\u8a08\u91cf\u306e\u8868\u793a\ntrain_df.describe()<\/pre>\n\n\n\n<figure class=\"wp-block-image alignnone wp-image-89474 size-medium\"><img decoding=\"async\" width=\"300\" height=\"142\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/4c4feae0b4aa7bebf1110aa2015cec0e-300x142.png\" alt=\"\" class=\"wp-image-89474\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/4c4feae0b4aa7bebf1110aa2015cec0e-300x142.png 300w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/4c4feae0b4aa7bebf1110aa2015cec0e-150x71.png 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/4c4feae0b4aa7bebf1110aa2015cec0e.png 583w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-element-caption\">\u4ee3\u8868\u5024\u306e\u88681<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image alignnone wp-image-89475 size-medium\"><img decoding=\"async\" width=\"300\" height=\"150\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/1b0d13406c453bd17af159d65e381d08-300x150.png\" alt=\"\" class=\"wp-image-89475\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/1b0d13406c453bd17af159d65e381d08-300x150.png 300w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/1b0d13406c453bd17af159d65e381d08-150x75.png 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/1b0d13406c453bd17af159d65e381d08.png 549w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-element-caption\">\u4ee3\u8868\u5024\u306e\u88682<\/figcaption><\/figure>\n\n\n\n<p>\u7279\u5fb4\u540c\u58eb\u306e\u95a2\u4fc2\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u3053\u3053\u3067\u306fseaborn\u306epariplot\u95a2\u6570\u3067\u4e00\u6c17\u306b\u3084\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u30b0\u30e9\u30d5\u3092\u898b\u308b\u3053\u3068\u3067\u3001\u3069\u306e\u7279\u5fb4\u304c\u3069\u306e\u7279\u5fb4\u306b\u4f3c\u3066\u3044\u308b\u306e\u304b\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u975e\u5e38\u306b\u4f3c\u3066\u3044\u308b\u7279\u5fb4\u304c\u3042\u308b\u306a\u3089\u3070\u3001\u305d\u308c\u3092\u53c2\u8003\u306b\u7279\u5fb4\u3092\u7701\u304f\u3053\u3068\u3082\u51fa\u6765\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image wp-image-89478 size-large\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"640\" height=\"639\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/44c23b6b15d70994d766716b66bcaf1c-640x639.png\" alt=\"\" class=\"wp-image-89478\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/44c23b6b15d70994d766716b66bcaf1c-640x639.png 640w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/44c23b6b15d70994d766716b66bcaf1c-150x150.png 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/44c23b6b15d70994d766716b66bcaf1c-300x300.png 300w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/44c23b6b15d70994d766716b66bcaf1c-810x809.png 810w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/44c23b6b15d70994d766716b66bcaf1c-1140x1139.png 1140w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><figcaption class=\"wp-element-caption\">pairplot<\/figcaption><\/figure>\n<\/div>\n\n\n<p>\u3053\u3053\u3067\u306f\u30c7\u30fc\u30bf\u306e\u7279\u6027\u306b\u3064\u3044\u3066\u306e\u8003\u5bdf\u306f\u884c\u3063\u3066\u3044\u307e\u305b\u3093\u3002\u672c\u6765\u3067\u3042\u308c\u3070<span style=\"color: #ff0000;\"><strong>\u7279\u5fb4\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0<\/strong><\/span>\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e88\u6e2c\u7cbe\u5ea6\u304c\u9ad8\u304f\u306a\u308b\u3088\u3046\u306a\u7279\u5fb4\u3092\u4f5c\u3063\u305f\u308a\u3001\u4e0d\u8981\u306a\u7279\u5fb4\u3092\u524a\u9664\u3057\u305f\u308a\u3068\u8a00\u3063\u305f\u4f5c\u696d\u304c\u3053\u308c\u306b\u8a72\u5f53\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u56de\u5e30\u5206\u6790<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u306e\u5b66\u7fd2<\/h3>\n\n\n\n<p>\u4eca\u56de\u306f\u4f4f\u5b85\u4fa1\u683c\u3092\u305d\u308c\u4ee5\u5916\u306e\u60c5\u5831\u304b\u3089\u4e88\u6e2c\u3059\u308b\u306e\u304c\u76ee\u7684\u3067\u3059\u3002<span style=\"color: #008000;\"><strong>\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u56de\u5e30<\/strong><\/span>\u3092\u4f7f\u3063\u3066\u3084\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>sklearn\u306b\u306f\u69d8\u3005\u306a\u6a5f\u68b0\u5b66\u7fd2\u30e2\u30c7\u30eb\u304c\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u30c7\u30fc\u30bf\u3068\u76ee\u7684\u306b\u3042\u3063\u305f\u3082\u306e\u3092\u9078\u3076\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3064\u3044\u3066\u306f\u52c9\u5f37\u3059\u308b\u4ee5\u5916\u306b\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u4e00\u3064\u306e\u6307\u91dd\u3068\u3057\u3066sklearn\u306e\u30c1\u30fc\u30c8\u30b7\u30fc\u30c8\u3092\u898b\u3066\u307f\u308b\u306e\u3082\u624b\u3067\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image wp-image-87778 size-large\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"640\" height=\"399\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/sklearn-640x399.png\" alt=\"\" class=\"wp-image-87778\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/sklearn-640x399.png 640w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/sklearn-150x94.png 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/sklearn-300x187.png 300w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/sklearn-810x505.png 810w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2019\/03\/sklearn-1140x711.png 1140w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><figcaption class=\"wp-element-caption\">Choosing the right estimator<\/figcaption><\/figure>\n<\/div>\n\n\n<p>RFR\u30af\u30e9\u30b9\u306f\u4e26\u5217\u51e6\u7406\u3067\u8a13\u7df4\u6642\u9593\u3092\u77ed\u7e2e\u3067\u304d\u308b\u306e\u3067\u3001n_jobs\u306b\u4f7f\u3048\u308b\u30b3\u30a2\u6570\u3092\u6307\u5b9a\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">rg = RFR(n_jobs=-1, random_state=2525) # n_jobs=-1\u3067\u30b3\u30a2\u3059\u3079\u3066\u3092\u4f7f\u3063\u3066\u4e26\u5217\u306b\u5b66\u7fd2\u3067\u304d\u308b\n \nrg.fit(train_data, train_target) # \u8a13\u7df4<\/pre>\n\n\n\n<p>[\u51fa\u529b\u7d50\u679c]<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">RandomForestRegressor(bootstrap=True, criterion='mse', max_depth=None,\n           max_features='auto', max_leaf_nodes=None,\n           min_impurity_decrease=0.0, min_impurity_split=None,\n           min_samples_leaf=1, min_samples_split=2,\n           min_weight_fraction_leaf=0.0, n_estimators=10, n_jobs=-1,\n           oob_score=False, random_state=2525, verbose=0, warm_start=False)<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306a\u554f\u984c\u3067\u306f\u3001\u3053\u306e\u3088\u3046\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u5f15\u6570\u3092\u305d\u306e\u307e\u307e\u4f7f\u3046\u306e\u306f\u8ce2\u3044\u3084\u308a\u65b9\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u3061\u3083\u3093\u3068\u3084\u308b\u5834\u5408\u306f\u30b0\u30ea\u30c3\u30c9\u30b5\u30fc\u30c1\u3084\u30e9\u30f3\u30c0\u30e0\u30b5\u30fc\u30c1\u306a\u3069\u306e<strong><span style=\"color: #ff0000;\">\u30d1\u30e9\u30e1\u30fc\u30bf\u30b5\u30fc\u30c1<\/span><\/strong>\u3092\u884c\u3063\u3066\u3001\u3082\u3063\u3068\u3082\u3089\u3057\u3044\u5024\u3092\u63a2\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001<span style=\"color: #ff0000;\"><strong>\u30af\u30ed\u30b9\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/strong><\/span>\u306b\u3088\u3063\u3066\u30e2\u30c7\u30eb\u306e\u8a55\u4fa1\u3092\u884c\u3046\u5fc5\u8981\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b66\u7fd2\u7d50\u679c\u306e\u78ba\u8a8d<\/h3>\n\n\n\n<p>\u307e\u305a\u306f<strong>\u8a13\u7df4\u30c7\u30fc\u30bf\u306b\u3069\u306e\u304f\u3089\u3044fit\u3067\u304d\u305f\u304b<\/strong>\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u3053\u3053\u3067\u306f\u8a13\u7df4\u30c7\u30fc\u30bf\u306e\u4f4f\u5b85\u4fa1\u683c\uff08target\uff09\u3068\u3001\u30e2\u30c7\u30eb\u306e\u4e88\u6e2c\u3057\u305f\u4f4f\u5b85\u4fa1\u683c\u306e\u5e73\u5747\u4e8c\u4e57\u8aa4\u5dee\u3092\u51fa\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\uff08\u3053\u306e\u5024\u306f\u5c0f\u3055\u3044\u307b\u3069\u5b09\u3057\u3044\u3082\u306e\u3067\u3059\u3002\uff09<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">predicted_train_target = rg.predict(train_data)\nmean_squared_error(train_target, predicted_train_target)<\/pre>\n\n\n\n<p>[\u51fa\u529b\u7d50\u679c]<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">0.9729691006642613<\/pre>\n\n\n\n<p>\u305d\u308c\u306a\u308a\u306b\u3088\u304f\u51fa\u6765\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u3067\u3059\u304c\u3053\u308c\u3067\u5b89\u5fc3\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u8a13\u7df4\u30c7\u30fc\u30bf\u306b\u5bfe\u3057\u3066fit\u51fa\u6765\u3066\u3044\u3066\u3082\u3001\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306b\u5bfe\u3057\u3066\u3069\u3046\u306a\u306e\u304b\u306f\u307e\u3060\u308f\u304b\u308a\u307e\u305b\u3093\u304b\u3089\u306d\u3002<\/p>\n\n\n\n<p>\u3067\u306f\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u65b9\u3082\u8868\u793a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u306d\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">predicted_test_target = rg.predict(test_data)\nmean_squared_error(test_target, predicted_test_target)<\/pre>\n\n\n\n<p>[\u51fa\u529b\u7d50\u679c]<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">10.828846078431374<\/pre>\n\n\n\n<p>R^2\u306e\u30b9\u30b3\u30a2\u3082\u898b\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">rg.score(test_data, test_target)<\/pre>\n\n\n\n<p>[\u51fa\u529b\u7d50\u679c]<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">0.8540704890041346<\/pre>\n\n\n\n<p>\u3053\u306e\u5024\u306f\u305d\u3053\u307e\u3067\u826f\u3044\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u306d\u3002\u307e\u305f\u3001\u3053\u308c\u3092\u66f4\u306b\u826f\u304f\u3059\u308b\u306b\u306f\u3001\u5148\u7a0b\u7d39\u4ecb\u3057\u305f\u30d1\u30e9\u30e1\u30fc\u30bf\u30b5\u30fc\u30c1\u3084\u30af\u30ed\u30b9\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u3066\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3092\u884c\u3063\u305f\u308a\u3001\u30c7\u30fc\u30bf\u306e\u524d\u51e6\u7406\u3092\u3088\u308a\u3057\u3063\u304b\u308a\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u3053\u3053\u3067\u306f\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u3060\u3051\u3092\u4f7f\u3044\u307e\u3057\u305f\u304c\u3001SVM\u306a\u3069\u306e\u5225\u306e\u6a5f\u68b0\u5b66\u7fd2\u30e2\u30c7\u30eb\u3092\u8907\u6570\u4f7f\u3044\u3001\u305d\u308c\u3089\u3092\u30a2\u30f3\u30b5\u30f3\u30d6\u30eb\u3059\u308b\u3053\u3068\u3067\u3082\u3001\u3055\u3089\u306a\u308b\u6027\u80fd\u5411\u4e0a\u304c\u671f\u5f85\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Python\u3092\u4f7f\u3063\u3066\u30b7\u30f3\u30d7\u30eb\u306a\u30c7\u30fc\u30bf\u306e\u4e88\u6e2c\u3092\u884c\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>scikit-learn\u306f\u975e\u5e38\u306b\u4fbf\u5229\u3067\u4f7f\u3044\u3084\u3059\u3044\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u4eca\u56de\u4f7f\u3063\u305f\u30e9\u30f3\u30c0\u30e0\u30d5\u30a9\u30ec\u30b9\u30c8\u306b\u3064\u3044\u3066\u3082\u3001\u3069\u3046\u3044\u3046\u624b\u6cd5\u306a\u306e\u304b\u5206\u304b\u3089\u306a\u304f\u3066\u3082\u3042\u308b\u7a0b\u5ea6\u52d5\u304b\u3059\u3053\u3068\u304c\u51fa\u6765\u307e\u3057\u305f\u3002\u305f\u3060\u3057\u3001\u3057\u3063\u304b\u308a\u3068\u4f7f\u3044\u3053\u306a\u3059\u306b\u306f\u52c9\u5f37\u304c\u5fc5\u8981\u3067\u3059\u3002\u81ea\u5206\u3067\u5b9f\u88c5\u3067\u304d\u308b\u3088\u3046\u306b\u3068\u307e\u3067\u306f\u884c\u304b\u306a\u3044\u3067\u3082\u3001\u3069\u3046\u3044\u3046\u624b\u6cd5\u306a\u306e\u304b\u30a4\u30e1\u30fc\u30b8\u304c\u6e67\u304f\u7a0b\u5ea6\u307e\u3067\u306f\u6700\u4f4e\u9650\u899a\u3048\u3066\u304a\u304d\u305f\u3044\u3067\u3059\u306d\u3002<\/p>\n\n\n\n<p>\u6700\u5f8c\u306b\u3001\u3053\u3053\u3067\u7d39\u4ecb\u3057\u305f\u51e6\u7406\u306e\u4e00\u89a7\u306f\u3042\u304f\u307e\u3067\u3082\u6d41\u308c\u3092\u628a\u63e1\u3059\u308b\u306e\u304c\u76ee\u7684\u3060\u3068\u601d\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u8a18\u4e8b\u4e2d\u306b\u6563\u308a\u3070\u3081\u305f\u300c\u3053\u308c\u3092\u3057\u305f\u307b\u3046\u304c\u3044\u3044\u300d\u3068\u3044\u3046\u524d\u7f6e\u304d\u306e\u3042\u308b\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u81ea\u5206\u3067\u8abf\u3079\u3066\u8a66\u3057\u3066\u307f\u308b\u306e\u304c\u91cd\u8981\u3067\u3059\u3088\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Python\u3067\u6a5f\u68b0\u5b66\u7fd2\u304c\u3084\u3063\u3066\u307f\u305f\u3044Scikit-learn\u3092\u4f7f\u3063\u3066\u57fa\u672c\u7684\u306a\u4e88\u6e2c\u554f\u984c\u306e\u6d41\u308c\u3092\u3064\u304b\u307f\u305f\u3044 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