{"id":10136,"date":"2026-10-15T15:24:45","date_gmt":"2026-10-15T06:24:45","guid":{"rendered":"https:\/\/since2020.jp\/media\/?p=10136"},"modified":"2026-10-15T15:26:24","modified_gmt":"2026-10-15T06:26:24","slug":"synthetic-minority-over-sampling-technique","status":"publish","type":"post","link":"https:\/\/since2020.jp\/media\/synthetic-minority-over-sampling-technique\/","title":{"rendered":"\u4e0d\u5747\u8861\u30c7\u30fc\u30bf\u306e\u5c11\u6570\u6d3e\u3092\u300c\u5408\u6210\u300d\u3067\u5897\u3084\u3059\u2500\u2500SMOTE\u3068\u306f"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>\u30a4\u30f3\u30c8\u30ed\u30c0\u30af\u30b7\u30e7\u30f3<\/strong><\/h2>\n\n\n\n<p>\u89e3\u7d04\u4e88\u6e2c\u306e\u30e2\u30c7\u30eb\u3092\u4f5c\u3063\u3066\u3001\u6b63\u89e3\u7387\u3092\u6e2c\u3063\u305f\u308995%\u3067\u3057\u305f\u3002\u512a\u79c0\u306a\u30e2\u30c7\u30eb\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n\n\n\n<p>\u5b9f\u306f\u3001\u9867\u5ba21,000\u4eba\u306e\u3046\u3061\u3001\u89e3\u7d04\u3059\u308b\u306e\u304c50\u4eba\uff085%\uff09\u3060\u3051\u306a\u3089\u3001\u300c\u5168\u54e1\u3001\u89e3\u7d04\u3057\u306a\u3044\u300d\u3068\u4e88\u6e2c\u3059\u308b\u3060\u3051\u3067\u3001\u6b63\u89e3\u7387\u306f95%\u306b\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3053\u306e\u30e2\u30c7\u30eb\u306f\u3001\u89e3\u7d04\u3059\u308b\u4eba\u30921\u4eba\u3082\u898b\u3064\u3051\u3089\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u4e00\u65b9\u306e\u30af\u30e9\u30b9\u304c\u6975\u7aef\u306b\u5c11\u306a\u3044\u30c7\u30fc\u30bf\u3092\u3001<strong>\u4e0d\u5747\u8861\u30c7\u30fc\u30bf<\/strong>\u3068\u547c\u3073\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u4e0d\u5747\u8861\u30c7\u30fc\u30bf\u3078\u306e\u5bfe\u51e6\u6cd5\u306e1\u3064\u3067\u3042\u308b<strong>SMOTE\uff08Synthetic Minority Over-sampling Technique\uff09\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002SMOTE\u306f\u3001\u5c11\u6570\u6d3e\u306e\u30c7\u30fc\u30bf\u3092\u5897\u3084\u3059\u30aa\u30fc\u30d0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0<\/strong>\u306e\u624b\u6cd5\u306e1\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e0d\u5747\u8861\u30c7\u30fc\u30bf\u3068\u306f<\/strong><\/h2>\n\n\n\n<p>Chawla \u3089\uff082002\uff09\u306f\u3001\u300c\u5206\u985e\u3059\u308b\u30ab\u30c6\u30b4\u30ea\u304c\u3001\u304a\u304a\u3088\u305d\u540c\u3058\u6570\u3067\u73fe\u308c\u3066\u3044\u306a\u3044\u30c7\u30fc\u30bf\u300d\u3092\u4e0d\u5747\u8861\u30c7\u30fc\u30bf\u3068\u547c\u3093\u3067\u3044\u307e\u3059\u3002\u73fe\u5b9f\u306e\u30c7\u30fc\u30bf\u3067\u306f\u3001\u300c\u6b63\u5e38\u300d\u306a\u4f8b\u304c\u5927\u534a\u3067\u3001\u300c\u7570\u5e38\u300d\u3084\u300c\u6ce8\u76ee\u3057\u305f\u3044\u300d\u4f8b\u304c\u3001\u3054\u304f\u308f\u305a\u304b\u3067\u3042\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u7570\u5e38\u3092\u6b63\u5e38\u3068\u9593\u9055\u3048\u308b\u30b3\u30b9\u30c8\u306e\u307b\u3046\u304c\u3001\u305d\u306e\u9006\u3088\u308a\u5927\u304d\u3044\u3053\u3068\u3082\u591a\u3044\u3068\u6307\u6458\u3057\u3066\u3044\u307e\u3059\u3002\u89e3\u7d04\u3001\u4e0d\u6b63\u5229\u7528\u3001\u6545\u969c\u3001\u75c5\u6c17\u306e\u691c\u51fa\u306a\u3069\u304c\u3001\u4ee3\u8868\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u5148\u307b\u3069\u306e\u4f8b\u3092\u3001\u8868\u306b\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u4e88\u6e2c\u306e\u3057\u304b\u305f<\/th><th>\u6b63\u89e3\u7387<\/th><th>\u89e3\u7d04\u8005\u3092\u898b\u3064\u3051\u305f\u5272\u5408\uff08\u518d\u73fe\u7387\uff09<\/th><\/tr><\/thead><tbody><tr><td>\u5168\u54e1\u300c\u89e3\u7d04\u3057\u306a\u3044\u300d\u3068\u4e88\u6e2c<\/td><td>$95\\%\\,(950\/1000)$<\/td><td>$0\\%\\,(0\/50)$<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u518d\u73fe\u7387\uff1a<\/strong>\u00a0\u5b9f\u969b\u306e\u89e3\u7d04\u8005\u306e\u3046\u3061\u3001\u898b\u3064\u3051\u3089\u308c\u305f\u4eba\u306e\u5272\u5408<\/li>\n\n\n\n<li><strong>\u9069\u5408\u7387\uff1a<\/strong>\u00a0\u300c\u89e3\u7d04\u3059\u308b\u300d\u3068\u4e88\u6e2c\u3057\u305f\u4eba\u306e\u3046\u3061\u3001\u5b9f\u969b\u306b\u89e3\u7d04\u3057\u305f\u4eba\u306e\u5272\u5408<\/li>\n<\/ul>\n\n\n\n<p><strong>\u610f\u5473\uff1a<\/strong>\u6b63\u89e3\u7387\u3060\u3051\u3092\u898b\u308b\u3068\u3001\u5c11\u6570\u6d3e\u3092\u898b\u3064\u3051\u3089\u308c\u3066\u3044\u308b\u304b\u304c\u5206\u304b\u308a\u307e\u305b\u3093\u3002\u4e0d\u5747\u8861\u30c7\u30fc\u30bf\u3067\u306f\u3001\u518d\u73fe\u7387\u3001\u9069\u5408\u7387\u3001PR-AUC\uff08\u9069\u5408\u7387\u3068\u518d\u73fe\u7387\u306e\u95a2\u4fc2\u3092\u8868\u3059\u66f2\u7dda\u306e\u4e0b\u306e\u9762\u7a4d\uff09\u306a\u3069\u3092\u898b\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>SMOTE\u3068\u306f<\/strong><\/h2>\n\n\n\n<p><strong>SMOTE<\/strong>\u306f\u3001\u300c<strong>\u5c11\u6570\u6d3e\u306e\u30c7\u30fc\u30bf\u3092\u3001\u5408\u6210\u3057\u3066\u5897\u3084\u3057\u3001\u30af\u30e9\u30b9\u306e\u6570\u3092\u305d\u308d\u3048\u308b<\/strong>\u300d\u624b\u6cd5\u3067\u3059\u3002Chawla \u3089\u304c\u63d0\u6848\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u5c11\u6570\u6d3e\u3092\u5897\u3084\u3057\u3066\u3001\u30af\u30e9\u30b9\u306e\u6570\u3092\u305d\u308d\u3048\u308b\u64cd\u4f5c\u3092\u3001<strong>\u30aa\u30fc\u30d0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0<\/strong>\u3068\u547c\u3073\u307e\u3059\u3002\u53cd\u5bfe\u306b\u3001\u591a\u6570\u6d3e\u3092\u6e1b\u3089\u3059\u64cd\u4f5c\u306f\u3001<strong>\u30a2\u30f3\u30c0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0<\/strong>\u3068\u547c\u3073\u307e\u3059\u3002SMOTE\u306f\u3001\u30aa\u30fc\u30d0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u306e\u624b\u6cd5\u306e1\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u5c11\u6570\u6d3e\u3092\u5897\u3084\u3059\u4e00\u756a\u5358\u7d14\u306a\u65b9\u6cd5\u306f\u3001\u540c\u3058\u30c7\u30fc\u30bf\u3092\u8907\u88fd\u3059\u308b\u3053\u3068\u3067\u3059\uff08\u30e9\u30f3\u30c0\u30e0\u30aa\u30fc\u30d0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\uff09\u3002\u3057\u304b\u3057\u3001\u8907\u88fd\u3067\u306f\u65b0\u3057\u3044\u60c5\u5831\u304c\u5897\u3048\u307e\u305b\u3093\u300250\u4eba\u306e\u89e3\u7d04\u8005\u3092950\u4eba\u306b\u305d\u308d\u3048\u308b\u306a\u3089\u3001\u540c\u3058\u9867\u5ba2\u304c19\u56de\u305a\u3064\u767b\u5834\u3057\u307e\u3059\u3002SMOTE\u306f\u3001\u8907\u88fd\u3067\u306f\u306a\u304f\u3001\u5c11\u6570\u6d3e\u306e\u70b9\u3068\u3001\u305d\u306e\u8fd1\u304f\u306b\u3042\u308b\u5c11\u6570\u6d3e\u306e\u70b9\u3092\u7d50\u3076\u7dda\u5206\u306e\u4e0a\u306b\u3001\u65b0\u3057\u3044\u70b9\uff08\u5408\u6210\u30c7\u30fc\u30bf\uff09\u3092\u4f5c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"986\" height=\"490\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/10\/image-18.png\" alt=\"\" class=\"wp-image-10137\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/10\/image-18.png 986w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/10\/image-18-300x149.png 300w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/10\/image-18-768x382.png 768w\" sizes=\"(max-width: 986px) 100vw, 986px\" \/><\/figure>\n\n\n\n<p>\u56f31: SMOTE\u306e\u524d\u5f8c\u3002\u5c11\u6570\u6d3e\uff08\u7d2b\uff09\u306e\u70b9\u3068\u3001\u305d\u306e\u8fd1\u304f\u306e\u5c11\u6570\u6d3e\u306e\u70b9\u3092\u7d50\u3076\u7dda\uff08\u7834\u7dda\uff09\u306e\u4e0a\u306b\u3001\u5408\u6210\u30c7\u30fc\u30bf\uff08\u767d\u629c\u304d\u306e\u4e38\uff09\u304c\u52a0\u308f\u308b\u3002<\/p>\n\n\n\n<p>Chawla \u3089\u306f\u3001SMOTE\u306b\u3088\u308b\u5c11\u6570\u6d3e\u306e\u5897\u52a0\u3068\u3001\u591a\u6570\u6d3e\u3092\u6e1b\u3089\u3059\u64cd\u4f5c\uff08\u30a2\u30f3\u30c0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\uff09\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001ROC\u7a7a\u9593\u3067\u306e\u6027\u80fd\u306f\u3001\u30a2\u30f3\u30c0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3060\u3051\u306e\u5834\u5408\u3088\u308a\u826f\u304f\u306a\u308b\u3053\u3068\u3092\u793a\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>SMOTE\u306e\u3057\u304f\u307f<\/strong><\/h2>\n\n\n\n<p>\u5408\u6210\u30c7\u30fc\u30bf\u306f\u3001\u6b21\u306e4\u30b9\u30c6\u30c3\u30d7\u30671\u3064\u305a\u3064\u4f5c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5c11\u6570\u6d3e\u306e\u30c7\u30fc\u30bf\u304b\u3089\u30011\u3064\u9078\u3076\uff08\u70b9A\uff09<\/li>\n\n\n\n<li>\u5c11\u6570\u6d3e\u306e\u4e2d\u3067\u3001A\u306b\u8fd1\u3044\u9806\u306b\u00a0<em>k<\/em>\u00a0\u500b\u3092\u63a2\u3059\uff08<em>k<\/em>\u00a0\u8fd1\u508d\u3002imbalanced-learn \u306e\u65e2\u5b9a\u5024\u306f\u00a0$k=5$ \u3067\u3059\uff09<\/li>\n\n\n\n<li>\u305d\u306e\u00a0<em>k<\/em>\u00a0\u500b\u304b\u3089\u3001\u30e9\u30f3\u30c0\u30e0\u306b1\u3064\u9078\u3076\uff08\u70b9B\uff09<\/li>\n\n\n\n<li>A\u3068B\u3092\u7d50\u3076\u7dda\u5206\u4e0a\u306e\u3001\u30e9\u30f3\u30c0\u30e0\u306a\u4f4d\u7f6e\u306b\u3001\u65b0\u3057\u3044\u70b9\u3092\u4f5c\u308b<\/li>\n<\/ol>\n\n\n\n<p>\u65b0\u3057\u3044\u70b9\u306f $x_{\\mathrm{new}} = A + \\lambda(B-A)$\uff08$\\lambda \\in [0,1]$ \u306f\u4e00\u69d8\u4e71\u6570\uff09\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u6570\u5024\u4f8b\u3067\u7406\u89e3\u3059\u308b<\/strong><\/h3>\n\n\n\n<p>\u5c11\u6570\u6d3e\u304c5\u4eba\uff08A\u301cE\uff09\u3067\u30012\u3064\u306e\u7279\u5fb4\u306e\u5024\u304c\u6b21\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u3068\u3057\u307e\u3059\uff08\u67b6\u7a7a\u306e\u30c7\u30fc\u30bf\u3001$k=2$\uff09\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u70b9<\/th><th>\u7279\u5fb41<\/th><th>\u7279\u5fb42<\/th><th>A\u304b\u3089\u306e\u8ddd\u96e2<\/th><\/tr><\/thead><tbody><tr><td>A<\/td><td>2<\/td><td>3<\/td><td>\u2014<\/td><\/tr><tr><td>B<\/td><td>4<\/td><td>3<\/td><td>2.00<\/td><\/tr><tr><td>C<\/td><td>3<\/td><td>6<\/td><td>3.16<\/td><\/tr><tr><td>D<\/td><td>1<\/td><td>1<\/td><td>2.24<\/td><\/tr><tr><td>E<\/td><td>6<\/td><td>5<\/td><td>4.47<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"952\" height=\"508\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/10\/image-19.png\" alt=\"\" class=\"wp-image-10138\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/10\/image-19.png 952w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/10\/image-19-300x160.png 300w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/10\/image-19-768x410.png 768w\" sizes=\"(max-width: 952px) 100vw, 952px\" \/><\/figure>\n\n\n\n<p>\u56f32: \u70b9A\u304b\u3089\u898b\u3066\u8fd1\u30442\u70b9\uff08B\u3001D\uff09\u306e\u3046\u3061\u3001B\u3092\u9078\u3093\u3067 $\\lambda=0.5$ \u3068\u3059\u308b\u3068 (3, 3)\u3001D\u3092\u9078\u3093\u3067 $\\lambda=0.4$ \u3068\u3059\u308b\u3068 (1.6, 2.2) \u306b\u3001\u5408\u6210\u30c7\u30fc\u30bf\u304c\u3067\u304d\u308b\u3002C\u3001E\u306f\u3001A\u306e\u8fd1\u508d2\u70b9\u306b\u5165\u3089\u306a\u3044\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u2460\u2461<\/strong>\u00a0\u70b9A\u3092\u9078\u3073\u307e\u3059\u3002A\u306b\u8fd1\u30442\u70b9\u306f\u3001B\uff08\u8ddd\u96e22.00\uff09\u3068D\uff08\u8ddd\u96e22.24\uff09\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u2462\u2463\uff08B\u3092\u9078\u3093\u3060\u5834\u5408\uff09<\/strong>\u00a0$\\lambda=0.5$ \u306a\u3089\u3001$\\left(2,3\\right)+0.5\\left((4,3)-(2,3)\\right)=\\left(3,3\\right)$\u00a0\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u2462\u2463\uff08D\u3092\u9078\u3093\u3060\u5834\u5408\uff09<\/strong>\u00a0$\\lambda=0.4$ \u306a\u3089\u3001$\\left(2,3\\right)+0.4\\left((1,1)-(2,3)\\right)=\\left(1.6,2.2\\right)$\u00a0\u3067\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3092\u7e70\u308a\u8fd4\u3057\u3066\u3001\u5fc5\u8981\u306a\u6570\u3060\u3051\u5408\u6210\u30c7\u30fc\u30bf\u3092\u4f5c\u308a\u307e\u3059\u3002\u4ef6\u6570\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u5909\u308f\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><\/th><th>\u591a\u6570\u6d3e<\/th><th>\u5c11\u6570\u6d3e<\/th><th>\u5408\u6210\u30c7\u30fc\u30bf<\/th><\/tr><\/thead><tbody><tr><td>\u5143\u306e\u30c7\u30fc\u30bf<\/td><td>950<\/td><td>50<\/td><td>0<\/td><\/tr><tr><td>\u591a\u6570\u6d3e\u3068\u540c\u3058\u6570\u306b\u305d\u308d\u3048\u308b<\/td><td>950<\/td><td>950<\/td><td>900<\/td><\/tr><tr><td>$\\frac{\\text{\u5c11\u6570\u6d3e}}{\\text{\u591a\u6570\u6d3e}}=0.5$ \u306b\u3059\u308b<\/td><td>950<\/td><td>475<\/td><td>425<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>imbalanced-learn \u306e\u65e2\u5b9a\u306e\u8a2d\u5b9a\u3067\u306f\u3001\u5c11\u6570\u6d3e\u304c\u591a\u6570\u6d3e\u3068\u540c\u3058\u6570\u306b\u306a\u308b\u307e\u3067\u5897\u3084\u3057\u307e\u3059\u3002\u6bd4\u7387\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u610f\u5473\uff1a<\/strong>\u5408\u6210\u30c7\u30fc\u30bf\u306f\u3001\u5c11\u6570\u6d3e\u306e\u70b9\u306e\u300c\u3042\u3044\u3060\u300d\u306b\u3067\u304d\u307e\u3059\u3002\u540c\u3058\u70b9\u306e\u8907\u88fd\u3068\u9055\u3063\u3066\u3001\u5c11\u6570\u6d3e\u306e\u70b9\u304c\u3001\u7dda\u5206\u3067\u3064\u306a\u304c\u308c\u305f\u3088\u3046\u306b\u3001\u9818\u57df\u3068\u3057\u3066\u5e83\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u6ce8\u610f\u70b9\uff1a<\/strong>\u5408\u6210\u30c7\u30fc\u30bf\u306f\u3001\u5b9f\u5728\u3057\u306a\u3044\u9867\u5ba2\u306e\u30c7\u30fc\u30bf\u3067\u3059\u3002\u5c11\u6570\u6d3e\u306e\u70b9\u304c\u3001\u96e2\u308c\u3066\u3044\u305f\u308a\u3001\u591a\u6570\u6d3e\u306e\u70b9\u306e\u4e2d\u306b\u7d1b\u308c\u3066\u3044\u305f\u308a\u3059\u308b\u3068\u3001\u5408\u6210\u30c7\u30fc\u30bf\u304c\u3001\u591a\u6570\u6d3e\u306e\u9818\u57df\u306b\u5165\u308a\u8fbc\u3080\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4f7f\u3046\u3068\u304d\u306e\u6ce8\u610f\u70b9<\/strong><\/h2>\n\n\n\n<p><strong>SMOTE\u306f\u3001\u30c7\u30fc\u30bf\u3092\u5206\u3051\u3066\u304b\u3089\u3001\u8a13\u7df4\u30c7\u30fc\u30bf\u306b\u3060\u3051\u4f7f\u3044\u307e\u3059\u3002<\/strong>\u5168\u30c7\u30fc\u30bf\u306bSMOTE\u3092\u304b\u3051\u3066\u304b\u3089\u3001\u8a13\u7df4\u7528\u3068\u30c6\u30b9\u30c8\u7528\u306b\u5206\u3051\u308b\u3068\u3001\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u60c5\u5831\u304c\u3001\u5408\u6210\u30c7\u30fc\u30bf\u3092\u901a\u3058\u3066\u8a13\u7df4\u30c7\u30fc\u30bf\u306b\u6f0f\u308c\u307e\u3059\uff08\u30c7\u30fc\u30bf\u6f0f\u6d29\uff09\u3002imbalanced-learn \u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u3082\u3001\u5168\u30c7\u30fc\u30bf\u3092\u30ea\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3057\u3066\u304b\u3089\u5206\u5272\u3059\u308b\u3068\u3001\u6027\u80fd\u304c\u904e\u5927\u306b\u898b\u3048\u308b\u3001\u3068\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4ea4\u5dee\u691c\u8a3c\u3067\u306f\u3001\u5404\u5206\u5272\u306e\u8a13\u7df4\u5074\u3060\u3051\u306b\u9069\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306f\u3001\u5143\u306e\u5206\u5e03\u306e\u307e\u307e\u8a55\u4fa1\u3057\u307e\u3059\u3002<\/strong>\u00a0\u73fe\u5b9f\u306e\u30c7\u30fc\u30bf\u306f\u4e0d\u5747\u8861\u306a\u306e\u3067\u3001\u8a55\u4fa1\u3082\u3001\u5143\u306e\u4e0d\u5747\u8861\u306a\u30c7\u30fc\u30bf\u3067\u884c\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u8a55\u4fa1\u6307\u6a19\u306f\u3001\u6b63\u89e3\u7387\u3067\u306f\u306a\u304f\u3001\u518d\u73fe\u7387\u30fb\u9069\u5408\u7387\u30fbPR-AUC\u306a\u3069\u3092\u4f7f\u3044\u307e\u3059\u3002<\/strong><\/li>\n\n\n\n<li><strong>\u4e88\u6e2c\u3057\u305f\u78ba\u7387\u304c\u3001\u3086\u304c\u3080\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/strong>\u00a0\u30ed\u30b8\u30b9\u30c6\u30a3\u30c3\u30af\u56de\u5e30\u3067\u306f\u3001SMOTE\u306a\u3069\u306e\u4e0d\u5747\u8861\u88dc\u6b63\u306b\u3088\u3063\u3066\u5c11\u6570\u6d3e\u306b\u5c5e\u3059\u308b\u78ba\u7387\u304c\u5927\u304d\u304f\u904e\u5927\u8a55\u4fa1\u3055\u308c\uff08\u8f03\u6b63\u304c\u60aa\u5316\u3057\uff09\u3001AUC\u3067\u6e2c\u308b\u8b58\u5225\u6027\u80fd\u306f\u6539\u5584\u3057\u306a\u304b\u3063\u305f\u3068\u306e\u5831\u544a\u304c\u3042\u308a\u307e\u3059\u3002\u78ba\u7387\u305d\u306e\u3082\u306e\u3092\u4f7f\u3046\u5834\u9762\uff08\u30ea\u30b9\u30af\u306e\u70b9\u6570\u5316\u306a\u3069\uff09\u3067\u306f\u3001\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u5f37\u3044\u5206\u985e\u5668\u3067\u306f\u3001\u52b9\u679c\u304c\u5c0f\u3055\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/strong>\u00a0\u5f31\u3044\u5206\u985e\u5668\u3067\u306f\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0\u304c\u6027\u80fd\u3092\u4e0a\u3052\u3046\u308b\u4e00\u65b9\u3001XGBoost\u306a\u3069\u306e\u5f37\u3044\u5206\u985e\u5668\u3067\u306f\u3001\u4e0a\u304c\u3089\u306a\u304b\u3063\u305f\u3068\u5831\u544a\u3057\u3066\u3044\u307e\u3059\u3002\u5f37\u3044\u5206\u985e\u5668\u3067\u306f\u3001\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0\u3068\u3001\u3057\u304d\u3044\u5024\u306e\u6700\u9069\u5316\u306f\u3001\u540c\u7a0b\u5ea6\u306e\u6027\u80fd\u3067\u3057\u305f\u3002<\/li>\n\n\n\n<li><strong>\u6570\u5024\u3067\u306a\u3044\u7279\u5fb4\u306b\u306f\u3001\u305d\u306e\u307e\u307e\u3067\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002<\/strong>\u00a0\u300c\u70b9\u306e\u3042\u3044\u3060\u300d\u304c\u610f\u5473\u3092\u6301\u305f\u306a\u3044\u305f\u3081\u3067\u3059\u3002\u30ab\u30c6\u30b4\u30ea\u304c\u6df7\u3056\u308b\u30c7\u30fc\u30bf\u306b\u306f\u3001SMOTENC\u306a\u3069\u3092\u4f7f\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>SMOTE\u306e\u4ef2\u9593\u305f\u3061<\/strong><\/h2>\n\n\n\n<p>SMOTE\u306b\u306f\u3001\u591a\u304f\u306e\u6d3e\u751f\u624b\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002imbalanced-learn \u306a\u3069\u3067\u4f7f\u3048\u308b\u3001\u4ee3\u8868\u7684\u306a\u3082\u306e\u3092\u6319\u3052\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u624b\u6cd5<\/th><th>\u7279\u5fb4<\/th><\/tr><\/thead><tbody><tr><td>Borderline-SMOTE<\/td><td>\u5c11\u6570\u6d3e\u306e\u3046\u3061\u3001\u591a\u6570\u6d3e\u3068\u306e\u5883\u754c\u4ed8\u8fd1\u306e\u70b9\u3092\u4e2d\u5fc3\u306b\u3001\u5408\u6210\u30c7\u30fc\u30bf\u3092\u4f5c\u308b<\/td><\/tr><tr><td>ADASYN<\/td><td>\u5b66\u7fd2\u304c\u96e3\u3057\u3044\u5c11\u6570\u6d3e\u306e\u70b9\uff08\u5468\u308a\u306b\u591a\u6570\u6d3e\u304c\u591a\u3044\u70b9\uff09\u306e\u5468\u308a\u306b\u3001\u3088\u308a\u591a\u304f\u5408\u6210\u30c7\u30fc\u30bf\u3092\u4f5c\u308b<\/td><\/tr><tr><td>SMOTENC \/ SMOTEN<\/td><td>SMOTENC\u306f\u3001\u6570\u5024\u3068\u30ab\u30c6\u30b4\u30ea\u304c\u6df7\u3056\u3063\u305f\u30c7\u30fc\u30bf\u3001SMOTEN\u306f\u3001\u30ab\u30c6\u30b4\u30ea\u3060\u3051\u306e\u30c7\u30fc\u30bf\u306b\u5bfe\u5fdc\u3059\u308b<\/td><\/tr><tr><td>SMOTETomek \/ SMOTEENN<\/td><td>SMOTE\u3067\u5897\u3084\u3057\u305f\u5f8c\u3001\u5883\u754c\u4ed8\u8fd1\u306e\u7d1b\u3089\u308f\u3057\u3044\u70b9\u3092\u53d6\u308a\u9664\u304f\uff08\u305d\u308c\u305e\u308c\u3001Tomek links\u3001ENN\u3068\u3044\u3046\u65b9\u6cd5\u3092\u4f7f\u3046\uff09<\/td><\/tr><tr><td>GraphSMOTE<\/td><td>\u30b0\u30e9\u30d5\u30c7\u30fc\u30bf\uff08SNS\u306e\u5229\u7528\u8005\u3069\u3046\u3057\u306e\u3064\u306a\u304c\u308a\u306e\u3088\u3046\u306a\u3001\u30ce\u30fc\u30c9\u3068\u8fba\u3067\u3067\u304d\u305f\u30c7\u30fc\u30bf\uff09\u306e\u3001\u30ce\u30fc\u30c9\u5206\u985e\u5411\u3051\u3002\u30b0\u30e9\u30d5\u30cb\u30e5\u30fc\u30e9\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u4f5c\u3063\u305f\u57cb\u3081\u8fbc\u307f\u7a7a\u9593\u3067\u3001\u5c11\u6570\u6d3e\u306e\u30ce\u30fc\u30c9\u3092\u88dc\u9593\u3057\u3066\u5408\u6210\u3057\u3001\u5408\u6210\u3057\u305f\u30ce\u30fc\u30c9\u306e\u8fba\uff08\u3064\u306a\u304c\u308a\uff09\u306f\u3001\u8fba\u306e\u751f\u6210\u5668\u3067\u4e88\u6e2c\u3059\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u307b\u304b\u306e\u5bfe\u51e6\u6cd5\u3068\u306e\u6bd4\u8f03<\/strong><\/h2>\n\n\n\n<p>SMOTE\u306f\u3001\u4e0d\u5747\u8861\u30c7\u30fc\u30bf\u3078\u306e\u552f\u4e00\u306e\u5bfe\u51e6\u6cd5\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u65b9\u6cd5<\/th><th>\u5185\u5bb9<\/th><th>\u3072\u3068\u3053\u3068<\/th><\/tr><\/thead><tbody><tr><td>\u3057\u304d\u3044\u5024\u306e\u8abf\u6574<\/td><td>\u300c\u89e3\u7d04\u300d\u3068\u5224\u5b9a\u3059\u308b\u78ba\u7387\u306e\u3057\u304d\u3044\u5024\u3092\u30010.5\u304b\u3089\u52d5\u304b\u3059<\/td><td>\u5b66\u7fd2\u30c7\u30fc\u30bf\u3092\u5909\u3048\u305a\u306b\u6e08\u3080\u3002\u4e0a\u306e2\u3064\u306e\u7814\u7a76\u3067\u3001SMOTE\u3068\u540c\u7a0b\u5ea6\u306e\u6539\u5584\u304c\u5831\u544a\u3055\u308c\u3066\u3044\u308b<\/td><\/tr><tr><td>\u30af\u30e9\u30b9\u91cd\u307f<\/td><td>\u5c11\u6570\u6d3e\u306e\u9593\u9055\u3044\u3092\u3001\u3088\u308a\u5927\u304d\u304f\u7f70\u3059\u308b\uff08scikit-learn\u306e class_weight \u306a\u3069\uff09<\/td><td>\u30c7\u30fc\u30bf\u3092\u5897\u3084\u3055\u305a\u306b\u6e08\u3080<\/td><\/tr><tr><td>\u30e9\u30f3\u30c0\u30e0\u30aa\u30fc\u30d0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0<\/td><td>\u5c11\u6570\u6d3e\u306e\u30c7\u30fc\u30bf\u3092\u3001\u8907\u88fd\u3057\u3066\u5897\u3084\u3059<\/td><td>\u65b0\u3057\u3044\u60c5\u5831\u306f\u5897\u3048\u306a\u3044\u3002\u5358\u7d14\u306a\u30e9\u30f3\u30c0\u30e0\u30aa\u30fc\u30d0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u304c\u3001SMOTE\u306e\u3088\u3046\u306a\u624b\u6cd5\u3068\u540c\u7a0b\u5ea6\u306b\u6709\u52b9\u3060\u3063\u305f\u3068\u306e\u5831\u544a\u304c\u3042\u308a\u307e\u3059<\/td><\/tr><tr><td>\u30a2\u30f3\u30c0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0<\/td><td>\u591a\u6570\u6d3e\u3092\u6e1b\u3089\u3059<\/td><td>\u5b66\u7fd2\u306b\u4f7f\u3046\u30c7\u30fc\u30bf\u304c\u6e1b\u308b\u3002Chawla \u3089\u306f\u3001SMOTE\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u3044\u308b<\/td><\/tr><tr><td>\u5f37\u3044\u5206\u985e\u5668\u3092\u4f7f\u3046<\/td><td>\u52fe\u914d\u30d6\u30fc\u30b9\u30c6\u30a3\u30f3\u30b0\u306a\u3069\u3092\u4f7f\u3046<\/td><td>\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0\u306a\u3057\u3067\u3082\u3001\u5f31\u3044\u5206\u985e\u5668\u306e\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0\u5f8c\u3088\u308a\u826f\u304b\u3063\u305f<\/td><\/tr><tr><td>\u30c7\u30fc\u30bf\u3092\u96c6\u3081\u308b<\/td><td>\u5c11\u6570\u6d3e\u306e\u672c\u7269\u306e\u30c7\u30fc\u30bf\u3092\u5897\u3084\u3059<\/td><td>\u5408\u6210\u3067\u306f\u306a\u304f\u3001\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u304c\u5897\u3048\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u307e\u3068\u3081<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4e0d\u5747\u8861\u30c7\u30fc\u30bf\uff1a<\/strong>\u00a0\u6b63\u89e3\u7387\u304c\u9ad8\u304f\u3066\u3082\u3001\u5c11\u6570\u6d3e\u3092\u898b\u3064\u3051\u3089\u308c\u3066\u3044\u308b\u3068\u306f\u9650\u3089\u306a\u3044\u3002\u518d\u73fe\u7387\u306a\u3069\u3067\u898b\u308b<\/li>\n\n\n\n<li><strong>SMOTE\uff1a<\/strong>\u00a0\u30aa\u30fc\u30d0\u30fc\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u306e\u624b\u6cd5\u306e1\u3064\u3002\u5c11\u6570\u6d3e\u306e\u70b9\u3068\u3001\u305d\u306e\u8fd1\u304f\u306e\u5c11\u6570\u6d3e\u306e\u70b9\u3092\u7d50\u3076\u7dda\u5206\u4e0a\u306b\u3001\u5408\u6210\u30c7\u30fc\u30bf\u3092\u4f5c\u3063\u3066\u5897\u3084\u3059<\/li>\n\n\n\n<li><strong>\u4f7f\u3044\u65b9\uff1a<\/strong>\u00a0\u30c7\u30fc\u30bf\u3092\u5206\u3051\u3066\u304b\u3089\u3001\u8a13\u7df4\u30c7\u30fc\u30bf\u306b\u3060\u3051\u9069\u7528\u3059\u308b\u3002\u8a55\u4fa1\u306f\u3001\u5143\u306e\u5206\u5e03\u3067\u884c\u3046<\/li>\n\n\n\n<li><strong>\u9650\u754c\uff1a<\/strong>\u00a0\u78ba\u7387\u304c\u3086\u304c\u3080\u3053\u3068\u304c\u3042\u308b\u3002\u5f37\u3044\u5206\u985e\u5668\u3067\u306f\u3001\u3057\u304d\u3044\u5024\u306e\u8abf\u6574\u3068\u540c\u7a0b\u5ea6\u306e\u52b9\u679c\u306b\u3068\u3069\u307e\u308b\u3053\u3068\u304c\u3042\u308b<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u53c2\u8003\u6587\u732e<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Chawla, N. V., Bowyer, K. W., Hall, L. O., &amp; Kegelmeyer, W. P. (2002). SMOTE: Synthetic minority over-sampling technique.\u00a0<em>Journal of Artificial Intelligence Research<\/em>, 16, 321\u2013357.\u00a0<a href=\"https:\/\/doi.org\/10.1613\/jair.953\">https:\/\/doi.org\/10.1613\/jair.953<\/a><\/li>\n\n\n\n<li>van den Goorbergh, R., van Smeden, M., Timmerman, D., &amp; Van Calster, B. (2022). The harm of class imbalance corrections for risk prediction models: Illustration and simulation using logistic regression.\u00a0<em>Journal of the American Medical Informatics Association<\/em>, 29(9), 1525\u20131534.\u00a0<a href=\"https:\/\/doi.org\/10.1093\/jamia\/ocac093\">https:\/\/doi.org\/10.1093\/jamia\/ocac093<\/a><\/li>\n\n\n\n<li>Elor, Y., &amp; Averbuch-Elor, H. To SMOTE, or not to SMOTE? arXiv:2201.08528.\u00a0<a href=\"https:\/\/arxiv.org\/abs\/2201.08528\">https:\/\/arxiv.org\/abs\/2201.08528<\/a><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>\u30a4\u30f3\u30c8\u30ed\u30c0\u30af\u30b7\u30e7\u30f3 \u89e3\u7d04\u4e88\u6e2c\u306e\u30e2\u30c7\u30eb\u3092\u4f5c\u3063\u3066\u3001\u6b63\u89e3\u7387\u3092\u6e2c\u3063\u305f\u308995%\u3067\u3057\u305f\u3002\u512a\u79c0\u306a\u30e2\u30c7\u30eb\u3067\u3057\u3087\u3046\u304b\uff1f \u5b9f\u306f\u3001\u9867\u5ba21,000\u4eba\u306e\u3046\u3061\u3001\u89e3\u7d04\u3059\u308b\u306e\u304c50\u4eba\uff085%\uff09\u3060\u3051\u306a\u3089\u3001\u300c\u5168\u54e1\u3001\u89e3\u7d04\u3057\u306a\u3044\u300d\u3068\u4e88\u6e2c\u3059\u308b\u3060\u3051\u3067\u3001\u6b63\u89e3\u7387\u306f95% [&hellip;]<\/p>\n","protected":false},"author":77,"featured_media":10139,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","swell_btn_cv_data":"","footnotes":"","_wp_rev_ctl_limit":""},"categories":[1251],"tags":[39,33,419],"class_list":["post-10136","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-data-analysis","tag-39","tag-33","tag-419"],"_links":{"self":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/10136","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/users\/77"}],"replies":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/comments?post=10136"}],"version-history":[{"count":4,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/10136\/revisions"}],"predecessor-version":[{"id":10144,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/10136\/revisions\/10144"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/media\/10139"}],"wp:attachment":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/media?parent=10136"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/categories?post=10136"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/tags?post=10136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}