{"id":7195,"date":"2025-09-30T15:32:25","date_gmt":"2025-09-30T06:32:25","guid":{"rendered":"https:\/\/blog.since2020.jp\/?p=7195"},"modified":"2025-09-30T15:32:25","modified_gmt":"2025-09-30T06:32:25","slug":"manhattan-distance_glossary","status":"publish","type":"post","link":"https:\/\/since2020.jp\/media\/manhattan-distance_glossary\/","title":{"rendered":"\u30de\u30f3\u30cf\u30c3\u30bf\u30f3\u8ddd\u96e2\uff08L1\uff09\u3092\u672c\u97f3\u3067\u4f7f\u3044\u3053\u306a\u3059\uff1a\u5b9a\u7fa9\u30fb\u5b9f\u88c5\u30fb\u5b9f\u52d9\u3067\u306e\u9078\u3073\u65b9\u30ac\u30a4\u30c9"},"content":{"rendered":"\n<p>\u30de\u30f3\u30cf\u30c3\u30bf\u30f3\u8ddd\u96e2\uff08\u30bf\u30af\u30b7\u30fc\u8ddd\u96e2\u30fbL1\u30ce\u30eb\u30e0\uff09\u306e\u5b9a\u7fa9\u304b\u3089\u5b9f\u88c5\u3001k-NN\u3084\u6b63\u5247\u5316\u3068\u306e\u95a2\u4fc2\u3001\u30b9\u30d1\u30fc\u30b9\u30c7\u30fc\u30bf\u3067\u306e\u5229\u70b9\u3068\u843d\u3068\u3057\u7a74\u3001\u5b9f\u904b\u7528\u3067\u306e\u300c\u3044\u3064\u4f7f\u3046\u304b\uff0f\u4f7f\u308f\u306a\u3044\u304b\u300d\u307e\u3067\u3001\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u8996\u70b9\u3068\u30b3\u30fc\u30c9\u4f8b\u3092\u4ea4\u3048\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u6a5f\u68b0\u5b66\u7fd2\u30a8\u30f3\u30b8\u30cb\u30a2\u3084\u30c7\u30fc\u30bf\u30b5\u30a4\u30a8\u30f3\u30c6\u30a3\u30b9\u30c8\u5fc5\u8aad\u306e\u5b9f\u8df5\u30ac\u30a4\u30c9\u3002<\/p>\n\n\n<h2>\u306f\u3058\u3081\u306b\uff1a\u306a\u305c\u4eca\u30de\u30f3\u30cf\u30c3\u30bf\u30f3\u8ddd\u96e2\u3092\u518d\u8a55\u4fa1\u3059\u3079\u304d\u304b<\/h2>\n<p>\u30de\u30f3\u30cf\u30c3\u30bf\u30f3\u8ddd\u96e2\uff08Manhattan distance\u3001\u5225\u540d\uff1a\u30bf\u30af\u30b7\u30fc\u8ddd\u96e2\u3001L1\u8ddd\u96e2\uff09\u306f\u3001\u30d9\u30af\u30c8\u30eb\u306e\u5404\u5ea7\u6a19\u5dee\u306e<strong>\u7d76\u5bfe\u5024\u3092\u5408\u8a08\u3059\u308b<\/strong>\u5358\u7d14\u306a\u8ddd\u96e2\u5c3a\u5ea6\u3067\u3059\u3002\u76f4\u611f\u7684\u306b\u306f\u300c\u7881\u76e4\u76ee\u72b6\u306e\u9053\u3092\u79fb\u52d5\u3059\u308b\u3068\u304d\u306e\u79fb\u52d5\u91cf\u300d\u3092\u8868\u3057\u307e\u3059\u3002\u6570\u5f0f\u3067\u8868\u3059\u3068\u30012\u70b9 x,y\u2208Rdx,y \\in \\mathbb{R}^dx,y\u2208Rd \u306b\u5bfe\u3057\u3066<\/p>\r\n<p>dL1(x,y)=\u2211i=1d\u2223xi\u2212yi\u2223d_{L1}(x,y)=\\sum_{i=1}^d |x_i-y_i|<\/p>\r\n<p>dL1(x,y)=i=1\u2211d\u2223xi\u2212yi\u2223<\/p>\r\n<p>\u3068\u306a\u308a\u307e\u3059\u3002\u5b9a\u7fa9\u3084\u57fa\u790e\u7684\u306a\u8aac\u660e\u306f\u5165\u9580\u8a18\u4e8b\u3067\u4e01\u5be7\u306b\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\r\n<p><!-- notionvc: 4ad8d24f-5167-448d-8581-db47544aae6b --><\/p>\n\n<h2>\u30de\u30f3\u30cf\u30c3\u30bf\u30f3\u8ddd\u96e2\u306e\u300c\u672c\u8cea\u300d\uff1a\u5b9a\u7fa9\u3068\u6027\u8cea<\/h2>\n<p>\u30de\u30f3\u30cf\u30c3\u30bf\u30f3\u8ddd\u96e2\u306f L1 \u30ce\u30eb\u30e0\u306b\u57fa\u3065\u304f\u30e1\u30c8\u30ea\u30c3\u30af\u3067\u3001\u8ddd\u96e2\u306e\u5b9a\u7fa9\u81ea\u4f53\u304c<strong>\u5ea7\u6a19\u3054\u3068\u306e\u8aa4\u5dee\u306e\u7dcf\u548c<\/strong>\u3092\u6e2c\u308b\u70b9\u306b\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\u3002\u30e6\u30fc\u30af\u30ea\u30c3\u30c9\u8ddd\u96e2\uff08L2\uff09\u306f\u4e8c\u4e57\u548c\u306e\u5e73\u65b9\u6839\u3067\u300c\u9577\u3055\u300d\u3092\u6e2c\u308b\u306e\u306b\u5bfe\u3057\u3001L1\u306f\u300c\u5408\u8a08\u8aa4\u5dee\u300d\u3092\u91cd\u8996\u3057\u307e\u3059\u3002\u3053\u306e\u9055\u3044\u306f\u5916\u308c\u5024\u3078\u306e\u611f\u5ea6\u3084\u30b9\u30d1\u30fc\u30b9\u6027\u3068\u306e\u89aa\u548c\u6027\u306b\u76f4\u7d50\u3057\u307e\u3059\u3002\u6570\u5b66\u7684\u6027\u8cea\u3084\u9ad8\u6821\u6570\u5b66\u7684\u306a\u89e3\u8aac\u3082\u307e\u3068\u307e\u3063\u3066\u3044\u307e\u3059\u3002<a href=\"https:\/\/manabitimes.jp\/math\/1127\">\u5b66\u3073Times<\/a><\/p>\r\n<b><strong>\u91cd\u8981\u306a\u6027\u8cea\uff08\u8981\u70b9\uff09<\/strong><\/b>\r\n<ul>\r\n\t<li>\u30ce\u30eb\u30e0\u3068\u3057\u3066\u4e09\u89d2\u4e0d\u7b49\u5f0f\u3092\u6e80\u305f\u3059\uff08\u30e1\u30c8\u30ea\u30c3\u30af\u3067\u3042\u308b\uff09\u3002<\/li>\r\n\t<li>L1\u306f\u6210\u5206\u3054\u3068\u306e\u5bc4\u4e0e\u304c\u7dda\u5f62\u548c\u3067\u8868\u308c\u308b\u305f\u3081\u300c\u3069\u306e\u6b21\u5143\u3067\u8aa4\u5dee\u304c\u51fa\u305f\u304b\u300d\u304c\u5206\u304b\u308a\u3084\u3059\u3044\u3002<\/li>\r\n\t<li>L2\u306b\u6bd4\u3079\u3066\u5916\u308c\u5024\uff08\u6975\u7aef\u306a1\u6b21\u5143\u306e\u5dee\uff09\u304c\u8ddd\u96e2\u306b\u4e0e\u3048\u308b\u5f71\u97ff\u304c\u76f8\u5bfe\u7684\u306b\u5c0f\u3055\u3044\u5834\u5408\u304c\u591a\u3044\u3002<\/li>\r\n<\/ul>\r\n<p><!-- notionvc: 289cbf53-221f-4a1d-a5c3-4e865205635c --><\/p>\n\n<h2>\u5b9f\u88c5\u3068\u9ad8\u901f\u5316 \u2014 \u5b9f\u7528\u30b3\u30fc\u30c9\uff08NumPy\uff09<\/h2>\n<p>\u5b9f\u52d9\u3067\u3088\u304f\u4f7f\u3046\u3001<strong>\u70b9\u96c6\u5408A\uff08n\u00d7d\uff09\u3068\u70b9\u96c6\u5408B\uff08m\u00d7d\uff09\u9593\u306e\u30de\u30f3\u30cf\u30c3\u30bf\u30f3\u8ddd\u96e2\u884c\u5217<\/strong>\u3092NumPy\u3067\u9ad8\u901f\u306b\u8a08\u7b97\u3059\u308b\u4f8b\uff1a<\/p>\r\n<pre><code class=\"language-python\">import numpy as np\r\n\r\n# A: (n, d), B: (m, d)\r\ndef manhattan_distance_matrix(A, B):\r\n    # \u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u3092\u5229\u7528\uff1a|A[:,None,:] - B[None,:,:]| -&gt; (n,m,d)\r\n    return np.abs(A[:, None, :] - B[None, :, :]).sum(axis=2)\r\n\r\n# \u4f8b\r\nA = np.array([[1,2],[3,4]])   # (2,2)\r\nB = np.array([[0,0],[2,2],[5,5]])  # (3,2)\r\nD = manhattan_distance_matrix(A, B)\r\nprint(D)  # (2,3) \u884c: A\u306e\u70b9\u3001\u5217: B\u306e\u70b9\r\n\r\n<\/code><\/pre>\r\n<p>\u30d9\u30af\u30c8\u30eb\u5316\u3059\u308c\u3070Python\u30ec\u30d9\u30eb\u306e\u30eb\u30fc\u30d7\u3092\u56de\u907f\u3057\u3066C\u5b9f\u88c5\uff08NumPy\uff09\u3067\u9ad8\u901f\u5316\u3067\u304d\u307e\u3059\u3002\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u3067\u306f\u30e1\u30e2\u30ea\u30d5\u30c3\u30c8\u30d7\u30ea\u30f3\u30c8\u306b\u6ce8\u610f\u3057\u3001\u30df\u30cb\u30d0\u30c3\u30c1\u5316\u3084GPU\uff08CuPy\u306a\u3069\uff09\u306e\u5229\u7528\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002Qiita\u306e\u5b9f\u88c5\u4f8b\u3082\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\r\n<p><!-- notionvc: 75be1dea-2e52-4e78-a773-a8cd0da8c17f --><\/p>\n\n<h2>\u5b9f\u52d9\u3067\u306e\u9078\u3073\u65b9\uff1aL1 vs L2\uff08\u30e6\u30fc\u30af\u30ea\u30c3\u30c9\uff09 \u2014 \u5177\u4f53\u7684\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h2>\n<b><strong>L1\uff08\u30de\u30f3\u30cf\u30c3\u30bf\u30f3\u8ddd\u96e2\uff09\u3092\u9078\u3076\u7406\u7531<\/strong><\/b>\r\n<ul>\r\n\t<li>\u7279\u5fb4\u304c<strong>\u30b9\u30d1\u30fc\u30b9<\/strong>\uff08\u591a\u304f\u304c\u30bc\u30ed\uff09\u3067\u3001\u6b21\u5143\u3054\u3068\u306e\u5bc4\u4e0e\u3092\u660e\u78ba\u306b\u3057\u305f\u3044\u3068\u304d\u3002<\/li>\r\n\t<li>\u5916\u308c\u5024\u3092\u5b8c\u5168\u306b\u7121\u8996\u3057\u305f\u304f\u306f\u306a\u3044\u304c\u3001L2\u307b\u3069\u4e8c\u4e57\u3067\u5897\u5e45\u3057\u305f\u304f\u306a\u3044\u5834\u5408\u3002<\/li>\r\n\t<li>L1\u6b63\u5247\u5316\uff08LASSO\uff09\u306e\u3088\u3046\u306b\u30b9\u30d1\u30fc\u30b9\u6027\u3068\u89aa\u548c\u6027\u304c\u3042\u308b\u30e2\u30c7\u30eb\u8a2d\u8a08\u3092\u884c\u3046\u5834\u5408\u3002<\/li>\r\n<\/ul>\r\n<b><strong>L2\uff08\u30e6\u30fc\u30af\u30ea\u30c3\u30c9\uff09\u3092\u9078\u3076\u7406\u7531<\/strong><\/b>\r\n<ul>\r\n\t<li>\u9023\u7d9a\u7684\u306a\u5e7e\u4f55\u5b66\u7684\u8ddd\u96e2\u611f\uff08\u56de\u8ee2\u3084\u76f4\u7dda\u8ddd\u96e2\uff09\u304c\u91cd\u8981\u306a\u5834\u5408\u3002<\/li>\r\n\t<li>\u8aa4\u5dee\u304c\u4e8c\u4e57\u548c\u3067\u610f\u5473\u3092\u6301\u3064\u7d71\u8a08\u7684\u4eee\u5b9a\uff08\u4f8b\uff1a\u30ac\u30a6\u30b9\u30ce\u30a4\u30ba\uff09\u3092\u4eee\u5b9a\u3067\u304d\u308b\u5834\u5408\u3002<\/li>\r\n<\/ul>\r\n<b><strong>\u5b9f\u52d9\u306e\u5224\u65ad\u30d5\u30ed\u30fc\uff08\u7c21\u6613\uff09<\/strong><\/b>\r\n<ol>\r\n\t<li>\u30c7\u30fc\u30bf\u306e\u5206\u5e03\u3068\u7279\u5fb4\u91cf\u30b9\u30b1\u30fc\u30eb\u3092\u53ef\u8996\u5316\u3059\u308b\uff08boxplot, hist\uff09\u3002<\/li>\r\n\t<li>\u7279\u5fb4\u304c\u30b9\u30d1\u30fc\u30b9\u306a\u3089L1\u7cfb\u3001\u9023\u7d9a\u306a\u3089L2\u3092\u307e\u305a\u8a66\u3059\u3002<\/li>\r\n\t<li>k-NN\u306a\u3069\u8ddd\u96e2\u30d9\u30fc\u30b9\u30e2\u30c7\u30eb\u306a\u3089\u4ea4\u5dee\u691c\u8a3c\u3067\u8a55\u4fa1\uff08\u6a19\u6e96\u5316\u306f\u5fc5\u9808\uff09\u3002<\/li>\r\n\t<li>\u6b21\u5143\u304c\u9ad8\u3044\u5834\u5408\u306f\u6b21\u5143\u524a\u6e1b\uff08PCA\uff09\u3084\u8fd1\u4f3c\u8fd1\u508d\u63a2\u7d22\u3092\u5c0e\u5165\u3057\u3066\u304b\u3089\u8a55\u4fa1\u3002<\/li>\r\n<\/ol>\r\n<p><!-- notionvc: 4cd44e83-2832-41fd-9f16-fdc069500e4f --><\/p>\n\n<h2>\u5fdc\u7528\u30b1\u30fc\u30b9\u30b9\u30bf\u30c7\u30a3\uff08\u5b9f\u4f8b\u3067\u8003\u3048\u308b\uff09<\/h2>\n<b>k-NN\u5206\u985e\u3067\u306e\u4f7f\u3044\u5206\u3051<\/b>\r\n<p>k-NN\u3067\u306f\u8ddd\u96e2\u304c\u305d\u306e\u307e\u307e\u4e88\u6e2c\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002\u30ab\u30c6\u30b4\u30ea\u30c7\u30fc\u30bf\u306e\u30ef\u30f3\u30db\u30c3\u30c8\u8868\u73fe\u3084\u30d0\u30a4\u30ca\u30ea\u7279\u5fb4\u306b\u306fL1\u304c\u5408\u3046\u3053\u3068\u304c\u591a\u304f\u3001\u753b\u50cf\u3084\u57cb\u3081\u8fbc\u307f\u30d9\u30af\u30c8\u30eb\u306e\u3088\u3046\u306a\u9023\u7d9a\u5024\u306b\u306fL2\u306e\u65b9\u304c\u76f4\u611f\u7684\u306b\u826f\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u5b9f\u52d9\u3067\u306f<strong>\u540c\u4e00\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067L1\/L2\u4e21\u65b9\u3092\u8a55\u4fa1\u3059\u308b<\/strong>\u3053\u3068\u304c\u624b\u5805\u3044\u3067\u3059\u3002<\/p>\r\n<b>LASSO\uff08L1\u6b63\u5247\u5316\uff09\u3068\u306e\u95a2\u4fc2<\/b>\r\n<p>\u6a5f\u68b0\u5b66\u7fd2\u306e\u6b63\u5247\u5316\u3067\u306f\u3001L1\u30ce\u30eb\u30e0\u306f\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u30b9\u30d1\u30fc\u30b9\u5316\u3059\u308b\u52b9\u679c\u304c\u3042\u308b\u305f\u3081\u3001\u89e3\u91c8\u6027\u3084\u7279\u5fb4\u9078\u629e\u3092\u91cd\u8996\u3059\u308b\u5834\u5408\u306b\u6709\u7528\u3067\u3059\uff08LASSO\uff09\u3002L1\u8ddd\u96e2\u306e\u300c\u30b9\u30d1\u30fc\u30b9\u6027\u3068\u89aa\u548c\u6027\u300d\u306f\u7406\u8ad6\u7684\u306b\u3082\u5b9f\u52d9\u7684\u306b\u3082\u898b\u9003\u305b\u306a\u3044\u6027\u8cea\u3067\u3059\u3002<\/p>\r\n<b>\u30ed\u30dc\u30c6\u30a3\u30af\u30b9\uff0f\u7d4c\u8def\u8a08\u753b\u3001\u90fd\u5e02\u89e3\u6790<\/b>\r\n<p>\u683c\u5b50\u72b6\u30de\u30c3\u30d7\u3084\u7881\u76e4\u76ee\u90fd\u5e02\uff08\u4f8b\uff1a\u30de\u30f3\u30cf\u30c3\u30bf\u30f3\u3001\u4eac\u90fd\u306e\u4e00\u90e8\uff09\u3067\u306f\u5b9f\u79fb\u52d5\u30b3\u30b9\u30c8\u304cL1\u306b\u8fd1\u304f\u306a\u308b\u305f\u3081\u3001\u7d4c\u8def\u8a55\u4fa1\u3084\u8fd1\u508d\u63a2\u7d22\u3067L1\u304c\u73fe\u5b9f\u7684\u306a\u6307\u6a19\u3068\u306a\u308a\u307e\u3059\u3002\u5177\u4f53\u4f8b\u3084\u76f4\u611f\u7684\u306a\u8aac\u660e\u306f\u53c2\u8003\u8a18\u4e8b\u306b\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\r\n<p><!-- notionvc: 5cc0e1d5-3e02-47b2-9d7c-9c55b84148d7 --><\/p>\n\n<h2>\u6ce8\u610f\u70b9\u3068\u843d\u3068\u3057\u7a74\uff08\u907f\u3051\u308b\u305f\u3081\u306e\u5b9f\u52d9\u30eb\u30fc\u30eb\uff09<\/h2>\n<ul>\r\n\t<li><strong>\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0<\/strong>\uff1a\u5404\u6b21\u5143\u306e\u5358\u4f4d\u304c\u30d0\u30e9\u30d0\u30e9\u3060\u3068\u7279\u5b9a\u6b21\u5143\u304c\u8ddd\u96e2\u3092\u652f\u914d\u3057\u307e\u3059\u3002\u5fc5\u305a\u6a19\u6e96\u5316\uff08Z\u30b9\u30b3\u30a2\uff09\u3084\u6b63\u898f\u5316\u3092\u884c\u3044\u307e\u3057\u3087\u3046\u3002<\/li>\r\n\t<li><strong>\u6b21\u5143\u306e\u546a\u3044<\/strong>\uff1a\u6b21\u5143\u304c\u975e\u5e38\u306b\u9ad8\u3044\u3068\u8ddd\u96e2\u306e\u9055\u3044\u304c\u8584\u308c\u308b\uff08\u5c40\u6240\u6027\u304c\u5931\u308f\u308c\u308b\uff09\u305f\u3081\u3001\u6b21\u5143\u524a\u6e1b\u3084\u7279\u5fb4\u9078\u629e\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/li>\r\n\t<li><strong>\u56de\u8ee2\u306b\u5bfe\u3059\u308b\u4e0d\u5909\u6027\u306e\u6b20\u5982<\/strong>\uff1aL1\u306f\u8ef8\u306b\u6cbf\u3063\u305f\u8aa4\u5dee\u306b\u654f\u611f\u3067\u3001\u30c7\u30fc\u30bf\u7a7a\u9593\u3092\u56de\u8ee2\u3059\u308b\u3068\u6319\u52d5\u304c\u5909\u308f\u308b\u70b9\u306b\u6ce8\u610f\u3002<\/li>\r\n\t<li><strong>\u8fd1\u4f3c\u8fd1\u508d\u63a2\u7d22\u306e\u9078\u629e<\/strong>\uff1aKD-tree\u306fL2\u306b\u6709\u5229\u306a\u8a2d\u8a08\u304c\u591a\u3044\u305f\u3081\u3001L1\u5411\u3051\u306b\u306f\u30d7\u30ed\u30fc\u30d6\u6570\u3084\u30cf\u30c3\u30b7\u30e5\u6cd5\u306a\u3069\u5b9f\u88c5\u3092\u5de5\u592b\u3057\u3066\u304f\u3060\u3055\u3044\u3002Qiita\u3084\u6280\u8853\u30d6\u30ed\u30b0\u306e\u5b9f\u88c5\u30d2\u30f3\u30c8\u304c\u5f79\u7acb\u3061\u307e\u3059\u3002<\/li>\r\n<\/ul>\r\n<p><!-- notionvc: dbd69c60-e4a1-453d-beb6-e33ab9e0ca2c --><\/p>\n\n<h2>\u767a\u5c55\uff1a\u5b66\u7fd2\u8ddd\u96e2\u3068\u91cd\u307f\u4ed8\u304dL1\u3001\u8fd1\u4f3c\u624b\u6cd5<\/h2>\n<p>\u8fd1\u5e74\u306f\u8ddd\u96e2\u81ea\u4f53\u3092\u5b66\u7fd2\u3059\u308b\u300c\u30e1\u30c8\u30ea\u30c3\u30af\u5b66\u7fd2\u300d\u304c\u666e\u53ca\u3057\u3066\u304a\u308a\u3001\u5358\u7d14\u306aL1\u3092<span data-token-index=\"1\" class=\"notion-enable-hover\">\u91cd\u307f\u4ed8\u304dL1<\/span>\u3084\u7dda\u5f62\u5909\u63db\u3067\u88dc\u5f37\u3059\u308b\u3053\u3068\u3067\u3001\u30bf\u30b9\u30af\u306b\u6cbf\u3063\u305f\u985e\u4f3c\u5ea6\u3092\u4f5c\u308c\u307e\u3059\uff08\u5b66\u7fd2\u3055\u308c\u305f\u91cd\u307f\u3067\u91cd\u8981\u6b21\u5143\u3092\u5f37\u8abf\uff09\u3002\u307e\u305f\u3001\u5927\u898f\u6a21\u96c6\u5408\u3067\u306fLSH\uff08\u30ed\u30fc\u30ab\u30ea\u30c6\u30a3\u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u30cf\u30c3\u30b7\u30f3\u30b0\uff09\u3001\u30e9\u30f3\u30c0\u30e0\u6295\u5f71\u3001GPU\u30d9\u30af\u30c8\u30eb\u5316\u306a\u3069\u3067\u5b9f\u7528\u7684\u306b\u52a0\u901f\u3067\u304d\u307e\u3059\u3002\u7814\u7a76\u3084\u5b9f\u88c5\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u5e38\u306b\u8ffd\u3046\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002<!-- notionvc: 3522380d-3416-40f5-a59b-38dc50c2d5f4 --><\/p>\n\n<h2>\u5b9f\u8df5\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\uff08\u30c7\u30d7\u30ed\u30a4\u524d\u306b\u78ba\u8a8d\uff09<\/h2>\n<ul>\r\n\t<li>\u7279\u5fb4\u91cf\u306e\u30b9\u30b1\u30fc\u30eb\u306f\u7d71\u4e00\u3055\u308c\u3066\u3044\u308b\u304b\uff08\u6a19\u6e96\u5316\/\u6b63\u898f\u5316\u6e08\u307f\uff09<\/li>\r\n\t<li>L1\u3068L2\u3092\u6bd4\u8f03\u3059\u308bA\/B\u8a55\u4fa1\u3092\u884c\u3063\u305f\u304b<\/li>\r\n\t<li>\u6b21\u5143\u6570\u304c\u5927\u304d\u3051\u308c\u3070PCA\u3084L1\u306b\u3088\u308b\u7279\u5fb4\u9078\u629e\u3092\u8a66\u3057\u305f\u304b<\/li>\r\n\t<li>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u306a\u3089\u8fd1\u4f3c\u8fd1\u508d\u63a2\u7d22\u3084\u30d0\u30c3\u30c1\u8a08\u7b97\u3067\u901f\u5ea6\u8a55\u4fa1\u6e08\u307f\u304b<\/li>\r\n\t<li>\u30e2\u30c7\u30eb\u306e\u89e3\u91c8\u6027\uff08\u91cd\u8981\u6b21\u5143\u306e\u7279\u5b9a\uff09\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001\u91cd\u307f\u4ed8\u304dL1\u3084LASSO\u3092\u691c\u8a0e\u3057\u305f\u304b<\/li>\r\n<\/ul>\r\n<p><!-- notionvc: fe0577c2-c642-480f-8dd0-74d0398ccefe --><\/p>\n\n<h2>\u307e\u3068\u3081\uff083\u5206\u3067\u6c7a\u65ad\uff09<\/h2>\n<p>\u30de\u30f3\u30cf\u30c3\u30bf\u30f3\u8ddd\u96e2\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u89e3\u91c8\u3057\u3084\u3059\u304f\u3001\u30b9\u30d1\u30fc\u30b9\u30c7\u30fc\u30bf\u3084\u7279\u5fb4\u9078\u629e\u3001\u7881\u76e4\u76ee\u72b6\u306e\u7a7a\u9593\u306a\u3069<span data-token-index=\"1\" class=\"notion-enable-hover\">\u5b9f\u52d9\u3067\u6709\u7528\u306b\u306a\u308b\u5834\u9762\u304c\u660e\u78ba<\/span>\u3067\u3059\u3002\u4e00\u65b9\u3067\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3084\u9ad8\u6b21\u5143\u306e\u554f\u984c\u3092\u7121\u8996\u3059\u308b\u3068\u6027\u80fd\u4f4e\u4e0b\u3092\u62db\u304d\u307e\u3059\u3002\u307e\u305a\u306f\u5c0f\u3055\u306a\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3067L1\u3068L2\u3092\u6bd4\u8f03\u8a55\u4fa1\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u91cd\u307f\u4ed8\u304dL1\u3084\u8fd1\u4f3c\u63a2\u7d22\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u2014\u2014\u3053\u308c\u304c\u5b9f\u52d9\u3067\u306e\u738b\u9053\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u3059\u3002<!-- notionvc: 52e4025b-d7ee-4605-b23c-a308dfb2aa1e --><\/p>","protected":false},"excerpt":{"rendered":"<p>\u30de\u30f3\u30cf\u30c3\u30bf\u30f3\u8ddd\u96e2\uff08\u30bf\u30af\u30b7\u30fc\u8ddd\u96e2\u30fbL1\u30ce\u30eb\u30e0\uff09\u306e\u5b9a\u7fa9\u304b\u3089\u5b9f\u88c5\u3001k-NN\u3084\u6b63\u5247\u5316\u3068\u306e\u95a2\u4fc2\u3001\u30b9\u30d1\u30fc\u30b9\u30c7\u30fc\u30bf\u3067\u306e\u5229\u70b9\u3068\u843d\u3068\u3057\u7a74\u3001\u5b9f\u904b\u7528\u3067\u306e\u300c\u3044\u3064\u4f7f\u3046\u304b\uff0f\u4f7f\u308f\u306a\u3044\u304b\u300d\u307e\u3067\u3001\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u8996\u70b9\u3068\u30b3\u30fc\u30c9\u4f8b\u3092\u4ea4\u3048\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u6a5f\u68b0\u5b66\u7fd2\u30a8\u30f3 [&hellip;]<\/p>\n","protected":false},"author":22,"featured_media":7196,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","swell_btn_cv_data":"","footnotes":"","_wp_rev_ctl_limit":""},"categories":[1249],"tags":[1143,1141,1142],"class_list":["post-7195","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-kk-nn","tag-l1"],"_links":{"self":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/7195","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\/22"}],"replies":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/comments?post=7195"}],"version-history":[{"count":0,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/7195\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/media\/7196"}],"wp:attachment":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/media?parent=7195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/categories?post=7195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/tags?post=7195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}