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id=\"onehot-alternative\" class=\"wp-block-heading\"><strong>\u9ad8\u30ab\u30fc\u30c7\u30a3\u30ca\u30ea\u30c6\u30a3\u3067\u306f\u5225\u306e\u8868\u73fe\u3082\u6bd4\u8f03\u3059\u308b<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ab\u30c6\u30b4\u30ea\u6570\u304c\u975e\u5e38\u306b\u591a\u3044\u5834\u5408\u306f\u3001\u983b\u5ea6\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3001\u30cf\u30c3\u30b7\u30e5\u5316\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3001\u57cb\u3081\u8fbc\u307f\u8868\u73fe\u306a\u3069\u3092\u6bd4\u8f03\u3057\u307e\u3059\u3002\u30bf\u30fc\u30b2\u30c3\u30c8\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306f\u76ee\u7684\u5909\u6570\u3092\u4f7f\u3046\u305f\u3081\u3001\u691c\u8a3c\u30c7\u30fc\u30bf\u306e\u60c5\u5831\u304c\u8a13\u7df4\u5074\u3078\u6f0f\u308c\u3084\u3059\u304f\u3001\u4ea4\u5dee\u691c\u8a3c\u5185\u3067\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30ef\u30f3\u30db\u30c3\u30c8\u3092\u907f\u3051\u308b\u3053\u3068\u304c\u76ee\u7684\u3067\u306f\u306a\u304f\u3001\u7cbe\u5ea6\u3001\u8aac\u660e\u3057\u3084\u3059\u3055\u3001\u30e1\u30e2\u30ea\u3001\u672a\u77e5\u30ab\u30c6\u30b4\u30ea\u3078\u306e\u5bfe\u5fdc\u3092\u57fa\u6e96\u306b\u9078\u3073\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"onehot-unknown\" class=\"wp-block-heading\" style=\"background:#c3d3e1; padding:12px 20px; margin:32px 0 16px; color:#222;\"><strong>\u672a\u77e5\u30ab\u30c6\u30b4\u30ea\u3068\u6b20\u640d\u306e\u6271\u3044\uff5c\u8a13\u7df4\u6642\u3068\u63a8\u8ad6\u6642\u306e\u5dee\u3092\u5438\u53ce\u3059\u308b<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u756a\u306e\u5165\u529b\u306b\u306f\u3001\u8a13\u7df4\u6642\u306b\u5b58\u5728\u3057\u306a\u304b\u3063\u305f\u65b0\u3057\u3044\u30ab\u30c6\u30b4\u30ea\u304c\u73fe\u308c\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u65b0\u3057\u3044\u5546\u54c1\u3001\u6d77\u5916\u306e\u5730\u57df\u3001\u8ffd\u52a0\u3055\u308c\u305f\u30d7\u30e9\u30f3\u306a\u3069\u3067\u3059\u3002\u672a\u77e5\u30ab\u30c6\u30b4\u30ea\u3092\u30a8\u30e9\u30fc\u306b\u3059\u308b\u3068\u63a8\u8ad6\u5168\u4f53\u304c\u505c\u6b62\u3059\u308b\u305f\u3081\u3001OneHotEncoder\u306ehandle_unknown\u3092ignore\u306b\u3057\u3066\u5168\u52170\u3068\u3057\u3066\u6271\u3046\u8a2d\u8a08\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u5168\u52170\u304c\u300c\u3069\u306e\u30ab\u30c6\u30b4\u30ea\u3067\u3082\u306a\u3044\u300d\u306e\u304b\u300c\u6b20\u640d\u300d\u306a\u306e\u304b\u306f\u5225\u306e\u60c5\u5831\u306a\u306e\u3067\u3001\u5fc5\u8981\u306a\u3089\u672a\u77e5\u30d5\u30e9\u30b0\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b20\u640d\u306f\u3001\u6b20\u640d\u5c02\u7528\u30ab\u30c6\u30b4\u30ea\u3078\u5909\u63db\u3057\u3066\u304b\u3089\u30ef\u30f3\u30db\u30c3\u30c8\u5316\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u6b20\u640d\u5024\u88dc\u5b8c\u5668\u3092\u5148\u306b\u7f6e\u304d\u3001\u6b20\u640d\u30d5\u30e9\u30b0\u3092\u6b8b\u3059\u8a2d\u8a08\u3082\u53ef\u80fd\u3067\u3059\u3002\u3069\u3061\u3089\u3092\u9078\u3076\u306b\u3057\u3066\u3082\u3001\u8a13\u7df4\u3001\u691c\u8a3c\u3001\u30c6\u30b9\u30c8\u3001\u672c\u756a\u3067\u540c\u3058\u524d\u51e6\u7406\u9806\u3092\u4f7f\u3044\u307e\u3059\u3002\u7a7a\u6587\u5b57\u3001\u6587\u5b57\u5217\u306e\u300cNaN\u300d\u3001Python\u306eNaN\u304c\u6df7\u5728\u3057\u3066\u3044\u308b\u3068\u5225\u30ab\u30c6\u30b4\u30ea\u306b\u306a\u308b\u305f\u3081\u3001\u5165\u529b\u6bb5\u968e\u3067\u6b63\u898f\u5316\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"onehot-pipeline\" class=\"wp-block-heading\" style=\"background:#c3d3e1; padding:12px 20px; margin:32px 0 16px; color:#222;\"><strong>\u30ef\u30f3\u30db\u30c3\u30c8\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u5b9f\u88c5\uff5cColumnTransformer\u3067\u5217\u3092\u7ba1\u7406\u3059\u308b<\/strong><\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>from sklearn.compose import ColumnTransformer\nfrom sklearn.pipeline import Pipeline\nfrom sklearn.preprocessing import OneHotEncoder, StandardScaler\nfrom sklearn.impute import SimpleImputer\n\nnumeric_pipe = Pipeline([\n    (\"imputer\", SimpleImputer(strategy=\"median\")),\n    (\"scaler\", StandardScaler()),\n])\ncategory_pipe = Pipeline([\n    (\"imputer\", SimpleImputer(strategy=\"most_frequent\")),\n    (\"onehot\", OneHotEncoder(handle_unknown=\"ignore\")),\n])\npreprocess = ColumnTransformer([\n    (\"num\", numeric_pipe, numeric_columns),\n    (\"cat\", category_pipe, category_columns),\n])<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4f8b\u3067\u306f\u3001\u6570\u5024\u5217\u3068\u30ab\u30c6\u30b4\u30ea\u5217\u3067\u7570\u306a\u308b\u524d\u51e6\u7406\u3092\u884c\u3044\u3001ColumnTransformer\u3067\u7d50\u5408\u3057\u307e\u3059\u3002OneHotEncoder\u306f\u8a13\u7df4\u30c7\u30fc\u30bf\u3067\u30ab\u30c6\u30b4\u30ea\u4e00\u89a7\u3092\u5b66\u7fd2\u3057\u3001\u305d\u306e\u5217\u9806\u3092\u4fdd\u5b58\u3057\u307e\u3059\u3002\u63a8\u8ad6\u6642\u306b\u540c\u3058\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3092\u518d\u4f5c\u6210\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u30ab\u30c6\u30b4\u30ea\u306e\u4e26\u3073\u304c\u5909\u308f\u308b\u3068\u3001\u30e2\u30c7\u30eb\u304c\u300c\u8272_\u8d64\u300d\u306e\u3064\u3082\u308a\u3067\u5225\u306e\u5217\u3092\u8aad\u3080\u5371\u967a\u304c\u3042\u308a\u307e\u3059\u3002\u524d\u51e6\u7406\u3068\u30e2\u30c7\u30eb\u3092\u4e00\u3064\u306ePipeline\u3068\u3057\u3066\u4fdd\u5b58\u3057\u3001\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u7ba1\u7406\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 id=\"onehot-pandas\" class=\"wp-block-heading\"><strong>pandas.get_dummies\u306f\u63a2\u7d22\u7528\u3068\u672c\u756a\u7528\u3092\u5206\u3051\u308b<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">pandas\u306eget_dummies\u306f\u3001\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u3092\u7d20\u65e9\u304f\u78ba\u8a8d\u3059\u308b\u63a2\u7d22\u5206\u6790\u3067\u4fbf\u5229\u3067\u3059\u3002\u305f\u3060\u3057\u8a13\u7df4\u30c7\u30fc\u30bf\u3068\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u3092\u5225\u3005\u306b\u5909\u63db\u3059\u308b\u3068\u3001\u5217\u306e\u96c6\u5408\u3084\u9806\u5e8f\u304c\u7570\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u9023\u7d50\u3057\u3066\u304b\u3089\u5909\u63db\u3059\u308b\u65b9\u6cd5\u306f\u30c6\u30b9\u30c8\u306e\u30ab\u30c6\u30b4\u30ea\u3092\u8a13\u7df4\u51e6\u7406\u3078\u898b\u305b\u308b\u3053\u3068\u306b\u306a\u308a\u3001\u8a55\u4fa1\u306e\u5883\u754c\u3092\u66d6\u6627\u306b\u3057\u307e\u3059\u3002\u672c\u756a\u306e\u5b66\u7fd2\u3067\u306f\u3001\u8a13\u7df4\u3067fit\u3057\u305f\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3092\u691c\u8a3c\u30fb\u30c6\u30b9\u30c8\u3078transform\u3059\u308b\u69cb\u6210\u3092\u512a\u5148\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"onehot-leakage\" class=\"wp-block-heading\" style=\"background:#c3d3e1; padding:12px 20px; margin:32px 0 16px; color:#222;\"><strong>\u30c7\u30fc\u30bf\u30ea\u30fc\u30af\u3092\u9632\u3050\u8a2d\u8a08\uff5c\u30ab\u30c6\u30b4\u30ea\u4e00\u89a7\u3082\u8a13\u7df4\u30c7\u30fc\u30bf\u3060\u3051\u3067\u5b66\u3076<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ef\u30f3\u30db\u30c3\u30c8\u5316\u306f\u5024\u30920\u30681\u3078\u7f6e\u304d\u63db\u3048\u308b\u3060\u3051\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u3069\u306e\u30ab\u30c6\u30b4\u30ea\u3092\u5217\u3068\u3057\u3066\u63a1\u7528\u3059\u308b\u304b\u3068\u3044\u3046\u60c5\u5831\u3092\u5b66\u7fd2\u3057\u307e\u3059\u3002\u5168\u30c7\u30fc\u30bf\u3067\u30ab\u30c6\u30b4\u30ea\u4e00\u89a7\u3092\u4f5c\u308b\u3068\u3001\u30c6\u30b9\u30c8\u671f\u9593\u3060\u3051\u306b\u51fa\u305f\u30ab\u30c6\u30b4\u30ea\u306e\u5b58\u5728\u3092\u8a13\u7df4\u51e6\u7406\u304c\u77e5\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u8a55\u4fa1\u3092\u53b3\u5bc6\u306b\u3059\u308b\u306b\u306f\u3001\u5206\u5272\u5f8c\u306e\u8a13\u7df4\u30c7\u30fc\u30bf\u3067\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3092fit\u3057\u3001\u691c\u8a3c\u30fb\u30c6\u30b9\u30c8\u306ftransform\u3060\u3051\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ea4\u5dee\u691c\u8a3c\u3067\u306f\u3001\u5404fold\u306e\u8a13\u7df4\u90e8\u5206\u3067\u30ab\u30c6\u30b4\u30ea\u4e00\u89a7\u3092\u4f5c\u308a\u307e\u3059\u3002\u3042\u308bfold\u3067\u672a\u51fa\u73fe\u306e\u30ab\u30c6\u30b4\u30ea\u304c\u691c\u8a3c\u90e8\u5206\u306b\u3042\u308c\u3070\u3001\u672a\u77e5\u30ab\u30c6\u30b4\u30ea\u3068\u3057\u3066ignore\u3059\u308b\u304b\u3001\u8a2d\u8a08\u3057\u305f\u300c\u305d\u306e\u4ed6\u300d\u3078\u307e\u3068\u3081\u307e\u3059\u3002\u5206\u5272\u306e\u524d\u5f8c\u3067\u5217\u6570\u304c\u5909\u308f\u308b\u306e\u306f\u81ea\u7136\u306a\u52d5\u4f5c\u3067\u3059\u3002\u8a55\u4fa1\u30b3\u30fc\u30c9\u3067\u7121\u7406\u306b\u5217\u3092\u305d\u308d\u3048\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u304c\u540c\u3058\u7279\u5fb4\u91cf\u7a7a\u9593\u3078\u5909\u63db\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"onehot-evaluation\" class=\"wp-block-heading\" style=\"background:#c3d3e1; padding:12px 20px; margin:32px 0 16px; color:#222;\"><strong>\u5909\u63db\u65b9\u6cd5\u306e\u8a55\u4fa1\uff5c\u30e2\u30c7\u30eb\u6027\u80fd\u3068\u89e3\u91c8\u6027\u3092\u540c\u3058\u6761\u4ef6\u3067\u6bd4\u3079\u308b<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ef\u30f3\u30db\u30c3\u30c8\u5316\u306e\u63a1\u7528\u5224\u65ad\u3067\u306f\u3001\u30e9\u30d9\u30eb\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3001\u983b\u5ea6\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3001\u30ab\u30c6\u30b4\u30ea\u3092\u307e\u3068\u3081\u308b\u65b9\u6cd5\u306a\u3069\u3092\u540c\u3058\u5206\u5272\u3068\u6307\u6a19\u3067\u6bd4\u8f03\u3057\u307e\u3059\u3002\u5206\u985e\u306a\u3089F1\u3001PR-AUC\u3001\u518d\u73fe\u7387\u306a\u3069\u696d\u52d9\u306e\u640d\u5931\u306b\u95a2\u4fc2\u3059\u308b\u6307\u6a19\u3092\u9078\u3073\u3001\u56de\u5e30\u306a\u3089MAE\u3084RMSE\u3092\u4f7f\u3044\u307e\u3059\u3002\u691c\u8a3c\u5206\u5272\u3092\u5909\u3048\u305f\u3068\u304d\u306e\u3070\u3089\u3064\u304d\u3001\u30ab\u30c6\u30b4\u30ea\u6570\u3001\u5b66\u7fd2\u6642\u9593\u3001\u63a8\u8ad6\u30e1\u30e2\u30ea\u3082\u5408\u308f\u305b\u3066\u8a18\u9332\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fc2\u6570\u3092\u8aac\u660e\u3059\u308b\u30e2\u30c7\u30eb\u3067\u306f\u3001\u30ab\u30c6\u30b4\u30ea\u5217\u3054\u3068\u306e\u4fc2\u6570\u3092\u57fa\u6e96\u30ab\u30c6\u30b4\u30ea\u3068\u306e\u5dee\u3068\u3057\u3066\u8aad\u3080\u306e\u304b\u3001\u5168\u5217\u306e\u4fc2\u6570\u3068\u3057\u3066\u8aad\u3080\u306e\u304b\u3092\u660e\u793a\u3057\u307e\u3059\u3002\u30ab\u30c6\u30b4\u30ea\u3092\u300c\u305d\u306e\u4ed6\u300d\u3078\u307e\u3068\u3081\u305f\u5834\u5408\u306f\u3001\u3069\u306e\u5024\u304c\u542b\u307e\u308c\u308b\u304b\u3092\u30c7\u30fc\u30bf\u8f9e\u66f8\u306b\u6b8b\u3057\u307e\u3059\u3002\u9ad8\u3044\u30b9\u30b3\u30a2\u3060\u3051\u3067\u306a\u304f\u3001\u73fe\u5834\u304c\u4e88\u6e2c\u7406\u7531\u3092\u78ba\u8a8d\u3067\u304d\u308b\u304b\u3001\u30ab\u30c6\u30b4\u30ea\u8ffd\u52a0\u306e\u305f\u3073\u306b\u518d\u5b66\u7fd2\u304c\u5fc5\u8981\u304b\u3082\u63a1\u7528\u57fa\u6e96\u3067\u3059\u3002<\/p>\n\n\n\n<h2 id=\"onehot-operation\" class=\"wp-block-heading\" style=\"background:#c3d3e1; padding:12px 20px; margin:32px 0 16px; color:#222;\"><strong>\u904b\u7528\u6642\u306e\u6ce8\u610f\u70b9\uff5c\u5217\u9806\u30fb\u672a\u77e5\u5024\u30fb\u30b9\u30ad\u30fc\u30de\u3092\u56fa\u5b9a\u3059\u308b<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ef\u30f3\u30db\u30c3\u30c8\u5316\u5f8c\u306e\u7279\u5fb4\u91cf\u306f\u3001\u5143\u306e\u30ab\u30c6\u30b4\u30ea\u540d\u3068\u5217\u9806\u306e\u5bfe\u5fdc\u304c\u5951\u7d04\u306b\u306a\u308a\u307e\u3059\u3002\u30e2\u30c7\u30eb\u30d5\u30a1\u30a4\u30eb\u3060\u3051\u3067\u306a\u304f\u3001\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3001\u30ab\u30c6\u30b4\u30ea\u4e00\u89a7\u3001drop\u8a2d\u5b9a\u3001\u672a\u77e5\u5024\u306e\u6271\u3044\u3001\u6b20\u640d\u51e6\u7406\u3001\u51fa\u529b\u5217\u540d\u3092\u4e00\u7dd2\u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002\u30d0\u30c3\u30c1\u51e6\u7406\u3068\u30aa\u30f3\u30e9\u30a4\u30f3\u63a8\u8ad6\u3067\u524d\u51e6\u7406\u306e\u5b9f\u88c5\u304c\u5225\u306b\u306a\u308b\u5834\u5408\u306f\u3001\u540c\u3058\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u3092\u4e21\u65b9\u3078\u901a\u3057\u3001\u540c\u3058\u5165\u529b\u304c\u540c\u3058\u30d9\u30af\u30c8\u30eb\u306b\u306a\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u904b\u7528\u76e3\u8996\u3067\u306f\u3001\u30ab\u30c6\u30b4\u30ea\u5225\u306e\u51fa\u73fe\u983b\u5ea6\u3001\u672a\u77e5\u30ab\u30c6\u30b4\u30ea\u7387\u3001\u5168\u52170\u306b\u306a\u3063\u305f\u884c\u306e\u5272\u5408\u3001\u7279\u5fb4\u91cf\u306e\u5217\u6570\u3092\u8ffd\u8de1\u3057\u307e\u3059\u3002\u65b0\u5546\u54c1\u3084\u5236\u5ea6\u5909\u66f4\u3067\u672a\u77e5\u30ab\u30c6\u30b4\u30ea\u7387\u304c\u4e0a\u304c\u3063\u305f\u5834\u5408\u3001ignore\u3067\u51e6\u7406\u3057\u7d9a\u3051\u308b\u3060\u3051\u3067\u306f\u4e88\u6e2c\u54c1\u8cea\u304c\u843d\u3061\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u5b9a\u306e\u95be\u5024\u3092\u8d85\u3048\u305f\u3089\u30ab\u30c6\u30b4\u30ea\u8f9e\u66f8\u3092\u66f4\u65b0\u3057\u3001\u518d\u5b66\u7fd2\u3068\u8a55\u4fa1\u3092\u884c\u3046\u624b\u9806\u3092\u7528\u610f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"onehot-summary\" class=\"wp-block-heading\" style=\"background:#c3d3e1; padding:12px 20px; margin:32px 0 16px; color:#222;\"><strong>\u30ef\u30f3\u30db\u30c3\u30c8\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u307e\u3068\u3081\uff5c\u5909\u63db\u3088\u308a\u4e00\u8cab\u3057\u305f\u524d\u51e6\u7406\u304c\u91cd\u8981<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ef\u30f3\u30db\u30c3\u30c8\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306f\u3001\u9806\u5e8f\u306e\u306a\u3044\u30ab\u30c6\u30b4\u30ea\u3092\u72ec\u7acb\u3057\u305f0\u30681\u306e\u5217\u3078\u5909\u63db\u3057\u3001\u30e2\u30c7\u30eb\u306b\u4e0d\u8981\u306a\u5927\u5c0f\u95a2\u4fc2\u3092\u4e0e\u3048\u306a\u3044\u65b9\u6cd5\u3067\u3059\u3002\u7dda\u5f62\u30e2\u30c7\u30eb\u3084\u8ddd\u96e2\u30d9\u30fc\u30b9\u306e\u624b\u6cd5\u3067\u4f7f\u3044\u3084\u3059\u3044\u4e00\u65b9\u3001\u30ab\u30c6\u30b4\u30ea\u6570\u304c\u5897\u3048\u308b\u3068\u6b21\u5143\u3068\u30e1\u30e2\u30ea\u304c\u81a8\u3089\u307f\u307e\u3059\u3002\u57fa\u6e96\u30ab\u30c6\u30b4\u30ea\u3092\u843d\u3068\u3059\u304b\u3001\u5168\u5217\u3092\u6b8b\u3059\u304b\u306f\u3001\u30e2\u30c7\u30eb\u3068\u4fc2\u6570\u306e\u89e3\u91c8\u3092\u8e0f\u307e\u3048\u3066\u6c7a\u3081\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u88c5\u3067\u306f\u8a13\u7df4\u30c7\u30fc\u30bf\u3060\u3051\u3067\u30ab\u30c6\u30b4\u30ea\u4e00\u89a7\u3092\u5b66\u7fd2\u3057\u3001\u672a\u77e5\u30ab\u30c6\u30b4\u30ea\u3001\u6b20\u640d\u3001\u4f4e\u983b\u5ea6\u30ab\u30c6\u30b4\u30ea\u306e\u51e6\u7406\u3092\u6c7a\u3081\u307e\u3059\u3002OneHotEncoder\u3092ColumnTransformer\u3068Pipeline\u306b\u7d44\u307f\u8fbc\u307f\u3001\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3068\u30e2\u30c7\u30eb\u3092\u540c\u3058\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u4fdd\u5b58\u3059\u308b\u3068\u3001\u5217\u9806\u306e\u4e8b\u6545\u3092\u9632\u304e\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u6027\u80fd\u3001\u8aac\u660e\u6027\u3001\u904b\u7528\u30b3\u30b9\u30c8\u3001\u30ab\u30c6\u30b4\u30ea\u8ffd\u52a0\u306e\u983b\u5ea6\u3092\u6bd4\u8f03\u3057\u3001\u5fc5\u8981\u306a\u3089\u5225\u306e\u8868\u73fe\u3082\u691c\u8a3c\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 id=\"faq\" class=\"wp-block-heading\" style=\"background:#c3d3e1; padding:12px 20px; margin:32px 0 16px; color:#222;\"><strong>\u3088\u304f\u3042\u308b\u8cea\u554f\uff08FAQ\uff09<\/strong><\/h2>\n\n\n\n<h3 id=\"q-onehot-definition\" class=\"wp-block-heading\"><strong>Q. \u30ef\u30f3\u30db\u30c3\u30c8\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/strong><\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u30ab\u30c6\u30b4\u30ea\u3054\u3068\u306b0\u30681\u306e\u5217\u3092\u4f5c\u308a\u3001\u8a72\u5f53\u3059\u308b\u30ab\u30c6\u30b4\u30ea\u306e\u5217\u3060\u3051\u30921\u306b\u3059\u308b\u5909\u63db\u3067\u3059\u3002\u9806\u5e8f\u306e\u306a\u3044\u30ab\u30c6\u30b4\u30ea\u3092\u6570\u5024\u306e\u5927\u5c0f\u3068\u3057\u3066\u8aa4\u89e3\u3055\u305b\u305a\u306b\u30e2\u30c7\u30eb\u3078\u5165\u529b\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 id=\"q-onehot-label\" class=\"wp-block-heading\"><strong>Q. \u30e9\u30d9\u30eb\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3068\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/strong><\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u30e9\u30d9\u30eb\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306f\u30ab\u30c6\u30b4\u30ea\u3092\u6574\u6570\u3078\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002\u30ef\u30f3\u30db\u30c3\u30c8\u306f\u30ab\u30c6\u30b4\u30ea\u3054\u3068\u306b\u5217\u3092\u5206\u3051\u308b\u305f\u3081\u3001\u9806\u5e8f\u306e\u306a\u3044\u30ab\u30c6\u30b4\u30ea\u3078\u4e0d\u8981\u306a\u5927\u5c0f\u95a2\u4fc2\u3092\u6301\u305f\u305b\u306b\u304f\u3044\u70b9\u304c\u9055\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 id=\"q-onehot-unknown\" class=\"wp-block-heading\"><strong>Q. \u672a\u77e5\u30ab\u30c6\u30b4\u30ea\u304c\u63a8\u8ad6\u6642\u306b\u51fa\u305f\u3089\u3069\u3046\u3057\u307e\u3059\u304b\uff1f<\/strong><\/h3>\n\n\n<p class=\"wp-block-paragraph\">\u672a\u77e5\u30ab\u30c6\u30b4\u30ea\u3092\u30a8\u30e9\u30fc\u306b\u305b\u305a\u5168\u52170\u3068\u3057\u3066\u6271\u3046\u3001\u307e\u305f\u306f\u300c\u305d\u306e\u4ed6\u300d\u3078\u307e\u3068\u3081\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u672a\u77e5\u7387\u3092\u76e3\u8996\u3057\u3001\u5897\u52a0\u3057\u305f\u5834\u5408\u306f\u30ab\u30c6\u30b4\u30ea\u8f9e\u66f8\u306e\u66f4\u65b0\u3068\u518d\u5b66\u7fd2\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 id=\"q-onehot-drop\" class=\"wp-block-heading\"><strong>Q. \u30c0\u30df\u30fc\u5909\u6570\u30921\u5217\u843d\u3068\u3059\u3079\u304d\u3067\u3059\u304b\uff1f<\/strong><\/h3>\n\n\n<p 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id=\"references\" class=\"wp-block-heading\" style=\"background:#c3d3e1; padding:12px 20px; margin:32px 0 16px; color:#222;\"><strong>\u53c2\u8003\u8cc7\u6599<\/strong><\/h2>\n\n\n<ul class=\"wp-block-list\"><li>scikit-learn\u300cOneHotEncoder\u300d<br><a href=\"https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.preprocessing.OneHotEncoder.html\" target=\"_blank\" rel=\"noopener\">https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.preprocessing.OneHotEncoder.html<\/a><\/li><li>scikit-learn User Guide\u300cCategorical Feature Support\u300d<br><a href=\"https:\/\/scikit-learn.org\/stable\/modules\/preprocessing.html#encoding-categorical-features\" target=\"_blank\" rel=\"noopener\">https:\/\/scikit-learn.org\/stable\/modules\/preprocessing.html#encoding-categorical-features<\/a><\/li><li>scikit-learn\u300cColumnTransformer\u300d<br><a href=\"https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.compose.ColumnTransformer.html\" target=\"_blank\" rel=\"noopener\">https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.compose.ColumnTransformer.html<\/a><\/li><li>scikit-learn\u300cPipeline\u300d<br><a href=\"https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.pipeline.Pipeline.html\" target=\"_blank\" rel=\"noopener\">https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.pipeline.Pipeline.html<\/a><\/li><li>pandas\u300cpandas.get_dummies\u300d<br><a href=\"https:\/\/pandas.pydata.org\/docs\/reference\/api\/pandas.get_dummies.html\" target=\"_blank\" rel=\"noopener\">https:\/\/pandas.pydata.org\/docs\/reference\/api\/pandas.get_dummies.html<\/a><\/li><\/ul>\n\n","protected":false},"excerpt":{"rendered":"<p>\u30ef\u30f3\u30db\u30c3\u30c8\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3068\u306f\u3001\u90fd\u9053\u5e9c\u770c\u3084\u5546\u54c1\u30ab\u30c6\u30b4\u30ea\u306e\u3088\u3046\u306a\u30ab\u30c6\u30b4\u30ea\u5909\u6570\u3092\u3001\u30ab\u30c6\u30b4\u30ea\u3054\u3068\u306e0\u30681\u306e\u5217\u3078\u5909\u63db\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u300c\u8d64\u30fb\u9752\u30fb\u7dd1\u300d\u3068\u3044\u30461\u5217\u3092\u3001\u300c\u8272=\u8d64\u300d\u300c\u8272=\u9752\u300d\u300c\u8272=\u7dd1\u300d\u306e3\u5217\u306b\u5c55\u958b\u3057\u3001\u8a72\u5f53\u3059\u308b\u5217\u3060\u3051\u3092 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