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padding:12px 20px; margin:32px 0 16px; color:#222;\"><strong>\u7dda\u5f62\u56de\u5e30\u3067L1\u6b63\u5247\u5316\u3092\u4f7f\u3046\uff5cLasso\u306e\u7279\u5fb4\u3068\u89e3\u91c8<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u56de\u5e30\u3067L1\u6b63\u5247\u5316\u3092\u4f7f\u3046\u4ee3\u8868\u7684\u306a\u65b9\u6cd5\u304cLasso\u3067\u3059\u3002\u76ee\u7684\u5909\u6570\u304c\u9023\u7d9a\u5024\u3067\u3001\u5019\u88dc\u7279\u5fb4\u91cf\u304c\u591a\u3044\u5834\u5408\u306b\u3001\u4e88\u6e2c\u3078\u5bc4\u4e0e\u3059\u308b\u5217\u3092\u7d5e\u308a\u8fbc\u3080\u7528\u9014\u304c\u3042\u308a\u307e\u3059\u3002\u4fc2\u6570\u304c0\u306b\u306a\u3063\u305f\u5217\u3092\u305d\u306e\u307e\u307e\u300c\u4e0d\u8981\u300d\u3068\u65ad\u5b9a\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u8907\u6570\u306e\u5206\u5272\u3084\u518d\u6a19\u672c\u5316\u3067\u9078\u629e\u983b\u5ea6\u3092\u8abf\u3079\u308b\u3068\u3001\u9078\u629e\u306e\u5b89\u5b9a\u6027\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from sklearn.linear_model import Lasso\nfrom sklearn.pipeline import Pipeline\nfrom sklearn.preprocessing import StandardScaler\n\nmodel = Pipeline([\n    (\"scale\", StandardScaler()),\n    (\"regressor\", Lasso(alpha=0.01, max_iter=10000)),\n])\nmodel.fit(X_train, y_train)\nprediction = model.predict(X_test)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">scikit-learn\u306eLasso\u3067\u306f\u3001alpha\u304c\u6b63\u5247\u5316\u306e\u5f37\u3055\u306b\u95a2\u4fc2\u3057\u307e\u3059\u3002\u5c0f\u3055\u3059\u304e\u308b\u3068\u4fc2\u6570\u304c\u307b\u3068\u3093\u3069\u7e2e\u307e\u305a\u3001\u5927\u304d\u3059\u304e\u308b\u3068\u591a\u304f\u306e\u4fc2\u6570\u304c0\u306b\u306a\u3063\u3066\u4e88\u6e2c\u6027\u80fd\u304c\u843d\u3061\u307e\u3059\u3002max_iter\u3092\u5897\u3084\u3057\u3066\u3082\u53ce\u675f\u3057\u306a\u3044\u5834\u5408\u306f\u3001\u7279\u5fb4\u91cf\u306e\u30b9\u30b1\u30fc\u30eb\u3001alpha\u3001\u8a31\u5bb9\u8aa4\u5dee\u3001\u5165\u529b\u306e\u6b20\u640d\u3084\u7121\u9650\u5024\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u5b9f\u9a13\u3067\u306falpha\u3068\u691c\u8a3c\u30b9\u30b3\u30a2\u3001\u975e\u30bc\u30ed\u4fc2\u6570\u6570\u3092\u4e00\u7dd2\u306b\u8a18\u9332\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"l1-logistic\" class=\"wp-block-heading\" style=\"background:#c3d3e1; padding:12px 20px; margin:32px 0 16px; color:#222;\"><strong>\u5206\u985e\u30e2\u30c7\u30eb\u3067L1\u6b63\u5247\u5316\u3092\u4f7f\u3046\uff5c\u30ed\u30b8\u30b9\u30c6\u30a3\u30c3\u30af\u56de\u5e30\u306e\u8a2d\u5b9a<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e8c\u5024\u5206\u985e\u3084\u591a\u30af\u30e9\u30b9\u5206\u985e\u3067\u306f\u3001L1\u30da\u30ca\u30eb\u30c6\u30a3\u4ed8\u304d\u30ed\u30b8\u30b9\u30c6\u30a3\u30c3\u30af\u56de\u5e30\u3092\u4f7f\u3048\u307e\u3059\u3002\u30c6\u30ad\u30b9\u30c8\u306e\u5358\u8a9e\u51fa\u73fe\u3001\u9867\u5ba2\u5c5e\u6027\u3001\u30ef\u30f3\u30db\u30c3\u30c8\u5316\u3057\u305f\u30ab\u30c6\u30b4\u30ea\u306a\u3069\u3001\u7279\u5fb4\u91cf\u304c\u591a\u3044\u554f\u984c\u3067\u3001\u4e88\u6e2c\u5f0f\u3092\u758e\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002scikit-learn\u306eLogisticRegression\u3067\u306fsolver\u3054\u3068\u306b\u5229\u7528\u3067\u304d\u308b\u30da\u30ca\u30eb\u30c6\u30a3\u304c\u7570\u306a\u308b\u305f\u3081\u3001\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u7d44\u307f\u5408\u308f\u305b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5206\u985e\u306e\u6b63\u5247\u5316\u30d1\u30e9\u30e1\u30fc\u30bfC\u306f\u3001\u4e00\u822c\u306b\u5c0f\u3055\u3044\u307b\u3069\u6b63\u5247\u5316\u304c\u5f37\u304f\u3001\u5927\u304d\u3044\u307b\u3069\u5f31\u304f\u306a\u308b\u5411\u304d\u3067\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002\u56de\u5e30\u306ealpha\u3068\u5411\u304d\u304c\u7570\u306a\u308b\u305f\u3081\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u3060\u3051\u3092\u6bd4\u8f03\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u4e0d\u5747\u8861\u30c7\u30fc\u30bf\u3067\u306fclass_weight\u3001\u8a55\u4fa1\u6307\u6a19\u3001\u3057\u304d\u3044\u5024\u3082\u540c\u6642\u306b\u8a2d\u8a08\u3057\u307e\u3059\u3002\u4fc2\u6570\u306e\u7d76\u5bfe\u5024\u304c\u5927\u304d\u3044\u5217\u3092\u91cd\u8981\u3068\u8aad\u3080\u524d\u306b\u3001\u6a19\u6e96\u5316\u3001\u30ab\u30c6\u30b4\u30ea\u306e\u57fa\u6e96\u3001\u76f8\u95a2\u3001\u6b63\u5247\u5316\u5f37\u5ea6\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"l1-selection\" class=\"wp-block-heading\" style=\"background:#c3d3e1; 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padding:12px 20px; margin:32px 0 16px; color:#222;\"><strong>L1\u6b63\u5247\u5316\u307e\u3068\u3081\uff5c\u758e\u6027\u3068\u4e88\u6e2c\u6027\u80fd\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u691c\u8a3c\u3059\u308b<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L1\u6b63\u5247\u5316\u306f\u3001\u640d\u5931\u95a2\u6570\u3078\u4fc2\u6570\u306e\u7d76\u5bfe\u5024\u306e\u5408\u8a08\u3092\u52a0\u3048\u3001\u4fc2\u6570\u3092\u7e2e\u5c0f\u3057\u306a\u304c\u3089\u4e00\u90e8\u30920\u306b\u3057\u3084\u3059\u304f\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002L2\u6b63\u5247\u5316\u304c\u4fc2\u6570\u3092\u5168\u4f53\u7684\u306b\u5c0f\u3055\u304f\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001L1\u306f\u7279\u5fb4\u91cf\u3092\u7d5e\u308a\u8fbc\u3080\u52b9\u679c\u304c\u3042\u308a\u307e\u3059\u3002Elastic Net\u306f\u4e21\u65b9\u306e\u6027\u8cea\u3092\u7d44\u307f\u5408\u308f\u305b\u3001\u76f8\u95a2\u3057\u305f\u7279\u5fb4\u91cf\u304c\u591a\u3044\u5834\u5408\u306e\u5019\u88dc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5229\u7528\u6642\u306f\u7279\u5fb4\u91cf\u306e\u30b9\u30b1\u30fc\u30eb\u3092\u305d\u308d\u3048\u3001\u6a19\u6e96\u5316\u30fb\u6b20\u640d\u88dc\u5b8c\u30fb\u7279\u5fb4\u91cf\u9078\u629e\u3092\u4ea4\u5dee\u691c\u8a3c\u306e\u5404\u8a13\u7df4\u5206\u5272\u5185\u3067\u884c\u3044\u307e\u3059\u3002\u6b63\u5247\u5316\u5f37\u5ea6\u306f\u696d\u52d9\u6307\u6a19\u3067\u9078\u3073\u3001\u30b9\u30b3\u30a2\u3001\u975e\u30bc\u30ed\u4fc2\u6570\u6570\u3001\u9078\u629e\u306e\u5b89\u5b9a\u6027\u3001\u63a8\u8ad6\u30b3\u30b9\u30c8\u3092\u8a18\u9332\u3057\u307e\u3059\u30020\u306b\u306a\u3063\u305f\u4fc2\u6570\u3092\u56e0\u679c\u95a2\u4fc2\u306e\u5426\u5b9a\u3068\u89e3\u91c8\u305b\u305a\u3001\u76f8\u95a2\u3068\u30c7\u30fc\u30bf\u5206\u5272\u306e\u5f71\u97ff\u3092\u78ba\u8a8d\u3057\u305f\u3046\u3048\u3067\u696d\u52d9\u5224\u65ad\u3078\u3064\u306a\u3052\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-l1-definition\" class=\"wp-block-heading\"><strong>Q. 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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\u300cLasso\u300d<br><a href=\"https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.linear_model.Lasso.html\" target=\"_blank\" rel=\"noopener\">https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.linear_model.Lasso.html<\/a><\/li><li>scikit-learn\u300cLogisticRegression\u300d<br><a href=\"https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.linear_model.LogisticRegression.html\" target=\"_blank\" rel=\"noopener\">https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.linear_model.LogisticRegression.html<\/a><\/li><li>scikit-learn\u300cElasticNet\u300d<br><a href=\"https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.linear_model.ElasticNet.html\" target=\"_blank\" rel=\"noopener\">https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.linear_model.ElasticNet.html<\/a><\/li><li>scikit-learn User Guide\u300cLinear Models\u300d<br><a href=\"https:\/\/scikit-learn.org\/stable\/modules\/linear_model.html\" target=\"_blank\" rel=\"noopener\">https:\/\/scikit-learn.org\/stable\/modules\/linear_model.html<\/a><\/li><li>scikit-learn\u300cStandardScaler\u300d<br><a href=\"https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.preprocessing.StandardScaler.html\" target=\"_blank\" rel=\"noopener\">https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.preprocessing.StandardScaler.html<\/a><\/li><\/ul>\n\n","protected":false},"excerpt":{"rendered":"<p>L1\u6b63\u5247\u5316\u3068\u306f\u3001\u6a5f\u68b0\u5b66\u7fd2\u30e2\u30c7\u30eb\u306e\u640d\u5931\u95a2\u6570\u306b\u4fc2\u6570\u306e\u7d76\u5bfe\u5024\u306e\u5408\u8a08\u3092\u52a0\u3048\u3001\u4fc2\u6570\u304c\u5927\u304d\u304f\u306a\u308a\u3059\u304e\u308b\u3053\u3068\u3092\u6291\u3048\u308b\u65b9\u6cd5\u3067\u3059\u3002\u4fc2\u6570\u306e\u4e00\u90e8\u304c\u3061\u3087\u3046\u30690\u306b\u306a\u308a\u3084\u3059\u3044\u305f\u3081\u3001\u7279\u5fb4\u91cf\u9078\u629e\u3084\u30e2\u30c7\u30eb\u306e\u758e\u5316\u306b\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u82f1\u8a9e\u3067\u306fLasso\u3001\u5206\u985e\u3067\u306f 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