{"id":1174,"date":"2023-07-27T09:50:11","date_gmt":"2023-07-27T09:50:11","guid":{"rendered":"https:\/\/statorials.org\/ko\/k-%e1%84%80%e1%85%a7%e1%86%b8-%e1%84%80%e1%85%ad%e1%84%8e%e1%85%a1-%e1%84%80%e1%85%a5%e1%86%b7%e1%84%8c%e1%85%b3%e1%86%bc\/"},"modified":"2023-07-27T09:50:11","modified_gmt":"2023-07-27T09:50:11","slug":"k-%e1%84%80%e1%85%a7%e1%86%b8-%e1%84%80%e1%85%ad%e1%84%8e%e1%85%a1-%e1%84%80%e1%85%a5%e1%86%b7%e1%84%8c%e1%85%b3%e1%86%bc","status":"publish","type":"post","link":"https:\/\/statorials.org\/ko\/k-%e1%84%80%e1%85%a7%e1%86%b8-%e1%84%80%e1%85%ad%e1%84%8e%e1%85%a1-%e1%84%80%e1%85%a5%e1%86%b7%e1%84%8c%e1%85%b3%e1%86%bc\/","title":{"rendered":"K-\ud3f4\ub4dc \uad50\ucc28 \uac80\uc99d\uc5d0 \ub300\ud55c \uac04\ub2e8\ud55c \uac00\uc774\ub4dc"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\ub370\uc774\ud130 \uc138\ud2b8\uc5d0 \ub300\ud55c \ubaa8\ub378\uc758 \uc131\ub2a5\uc744 \ud3c9\uac00\ud558\ub824\uba74 \ubaa8\ub378\uc758 \uc608\uce21\uc774 \uad00\ucc30\ub41c \ub370\uc774\ud130\uc640 \uc5bc\ub9c8\ub098 \uc798 \uc77c\uce58\ud558\ub294\uc9c0 \uce21\uc815\ud574\uc57c \ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc774\ub97c \uce21\uc815\ud558\ub294 \uac00\uc7a5 \uc77c\ubc18\uc801\uc778 \ubc29\ubc95\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub418\ub294 \ud3c9\uade0 \uc81c\uacf1 \uc624\ucc28(MSE)\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">MSE = (1\/n)*\u03a3(y <sub>i<\/sub> \u2013 f( <sub>xi<\/sub> )) <sup>2<\/sup><\/span><\/p>\n<p> <span style=\"color: #000000;\">\uae08:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>n:<\/strong> \ucd1d \uad00\uce21\uce58 \uc218<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>y <sub>i<\/sub> :<\/strong> <sup>i\ubc88\uc9f8<\/sup> \uad00\uce21\uac12\uc758 \uc751\ub2f5 \uac12<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>f(x <sub>i<\/sub> ):<\/strong> i <sup>\ubc88\uc9f8<\/sup> \uad00\uce21\uce58\uc758 \uc608\uce21 \ubc18\uc751 \uac12<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">\ubaa8\ub378 \uc608\uce21\uc774 \uad00\uce21\uac12\uc5d0 \uac00\uae4c\uc6b8\uc218\ub85d MSE\ub294 \ub0ae\uc544\uc9d1\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc2e4\uc81c\ub85c \uc6b0\ub9ac\ub294 \uc8fc\uc5b4\uc9c4 \ubaa8\ub378\uc758 MSE\ub97c \uacc4\uc0b0\ud558\uae30 \uc704\ud574 \ub2e4\uc74c \ud504\ub85c\uc138\uc2a4\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>1.<\/strong> \ub370\uc774\ud130 \uc138\ud2b8\ub97c \ud6c8\ub828 \uc138\ud2b8\uc640 \ud14c\uc2a4\ud2b8 \uc138\ud2b8\ub85c \ub098\ub215\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>2.<\/strong> \ud6c8\ub828 \uc138\ud2b8\uc758 \ub370\uc774\ud130\ub9cc \uc0ac\uc6a9\ud558\uc5ec \ubaa8\ub378\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>3.<\/strong> \ubaa8\ub378\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud14c\uc2a4\ud2b8 \uc138\ud2b8\uc5d0 \ub300\ud574 \uc608\uce21\ud558\uace0 \ud14c\uc2a4\ud2b8\uc758 MSE\ub97c \uce21\uc815\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">MSE \ud14c\uc2a4\ud2b8\ub294 \ubaa8\ub378\uc774 \uc774\uc804\uc5d0 \ubcf8 \uc801\uc774 \uc5c6\ub294 \ub370\uc774\ud130\uc5d0 \ub300\ud574 \uc5bc\ub9c8\ub098 \uc798 \uc218\ud589\ub418\ub294\uc9c0\uc5d0 \ub300\ud55c \uc544\uc774\ub514\uc5b4\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ub2e8\uc77c \ud14c\uc2a4\ud2b8 \uc138\ud2b8\ub97c \uc0ac\uc6a9\ud558\ub294 \uacbd\uc6b0\uc758 \ub2e8\uc810\uc740 \ud6c8\ub828 \ubc0f \ud14c\uc2a4\ud2b8 \uc138\ud2b8\uc5d0 \uc0ac\uc6a9\ub41c \uad00\uce21\uac12\uc5d0 \ub530\ub77c MSE \ud14c\uc2a4\ud2b8\uac00 \ud06c\uac8c \ub2ec\ub77c\uc9c8 \uc218 \uc788\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc774 \ubb38\uc81c\ub97c \ud53c\ud558\ub294 \ud55c \uac00\uc9c0 \ubc29\ubc95\uc740 \ub9e4\ubc88 \ub2e4\ub978 \ud6c8\ub828 \ubc0f \ud14c\uc2a4\ud2b8 \uc138\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubaa8\ub378\uc744 \uc5ec\ub7ec \ubc88 \uc801\ud569\uc2dc\ud0a8 \ub2e4\uc74c \ud14c\uc2a4\ud2b8 MSE\ub97c \ubaa8\ub4e0 \ud14c\uc2a4\ud2b8 MSE\uc758 \ud3c9\uade0\uc73c\ub85c \uacc4\uc0b0\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc774\ub7ec\ud55c \uc77c\ubc18\uc801\uc778 \ubc29\ubc95\uc744 \uad50\ucc28 \uac80\uc99d(cross-validation)\uc774\ub77c\uace0 \ud558\uba70 \ud2b9\uc815 \ud615\ud0dc\ub97c <b>k-\uacb9 \uad50\ucc28 \uac80\uc99d(k-fold cross-validation)<\/b> \uc774\ub77c\uace0 \ud569\ub2c8\ub2e4.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>K-\ud3f4\ub4dc \uad50\ucc28 \uac80\uc99d<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\"><strong>K-\uacb9 \uad50\ucc28 \uac80\uc99d\uc5d0\uc11c\ub294<\/strong> \ub2e4\uc74c \uc811\uadfc \ubc29\uc2dd\uc744 \uc0ac\uc6a9\ud558\uc5ec \ubaa8\ub378\uc744 \ud3c9\uac00\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>1\ub2e8\uacc4: \ub370\uc774\ud130 \uc138\ud2b8\ub97c \ub300\ub7b5 \ub3d9\uc77c\ud55c \ud06c\uae30\uc758 <em>k\uac1c<\/em> \uadf8\ub8f9, \uc989 &#8220;\uc811\uae30&#8221;\ub85c \ubb34\uc791\uc704\ub85c \ub098\ub215\ub2c8\ub2e4.<\/strong><\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11712 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/kfold1.png\" alt=\"\ub370\uc774\ud130 \uc138\ud2b8\ub97c k\uac1c\uc758 \uc811\uae30\ub85c \ubd84\ud560\" width=\"530\" height=\"133\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><strong>2\ub2e8\uacc4: \uc811\ud78c \ubd80\ubd84 \uc911 \ud558\ub098\ub97c \uace0\uc815 \uc138\ud2b8\ub85c \uc120\ud0dd\ud569\ub2c8\ub2e4. \ud15c\ud50c\ub9bf\uc744 \ub098\uba38\uc9c0 k-1 \uc811\uae30\ub85c \uc870\uc815\ud569\ub2c8\ub2e4. \uc778\uc7a5\ub41c \ud50c\ub77c\uc774\uc758 \uad00\ucc30\uc5d0 \ub300\ud55c MSE \ud14c\uc2a4\ud2b8\ub97c \uacc4\uc0b0\ud569\ub2c8\ub2e4.<\/strong><\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11713 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/kfold2.png\" alt=\"k-\uacb9 \uad50\ucc28 \uac80\uc99d\" width=\"550\" height=\"174\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><strong>3\ub2e8\uacc4: \ub9e4\ubc88 \ub2e4\ub978 \uc138\ud2b8\ub97c \uc81c\uc678 \uc138\ud2b8\ub85c \uc0ac\uc6a9\ud558\uc5ec \uc774 \ud504\ub85c\uc138\uc2a4\ub97c <em>k<\/em> \ubc88 \ubc18\ubcf5\ud569\ub2c8\ub2e4.<\/strong><\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11714 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/kfold3.png\" alt=\"k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc758 \uc608\" width=\"618\" height=\"234\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><strong>4\ub2e8\uacc4: \ud14c\uc2a4\ud2b8\uc758 <em>k<\/em> MSE \ud3c9\uade0\uc73c\ub85c \ud14c\uc2a4\ud2b8\uc758 \uc804\uccb4 MSE\ub97c \uacc4\uc0b0\ud569\ub2c8\ub2e4.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>\uac80\uc815 MSE = (1\/k)*\u03a3MSE <sub>i<\/sub><\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">\uae08:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>k:<\/strong> \uc811\ud78c \ud69f\uc218<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>MSE <sub>i<\/sub><\/strong> : <sup>i\ubc88\uc9f8<\/sup> \ubc18\ubcf5\uc5d0\uc11c MSE\ub97c \ud14c\uc2a4\ud2b8\ud569\ub2c8\ub2e4.<\/span><\/li>\n<\/ul>\n<h3> <span style=\"color: #000000;\"><strong>K\ub97c \uc120\ud0dd\ud558\ub294 \ubc29\ubc95<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">\uc77c\ubc18\uc801\uc73c\ub85c k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc5d0 \uc0ac\uc6a9\ud558\ub294 \uc811\uae30\uac00 \ub9ce\uc744\uc218\ub85d MSE \ud14c\uc2a4\ud2b8 \ud3b8\ud5a5\uc740 \ub0ae\uc544\uc9c0\uc9c0\ub9cc \ubd84\uc0b0\uc740 \ub192\uc544\uc9d1\ub2c8\ub2e4. \ubc18\ub300\ub85c, \uc811\ub294 \ud69f\uc218\uac00 \uc801\uc744\uc218\ub85d \ud3b8\ud5a5\uc740 \ub192\uc544\uc9c0\uc9c0\ub9cc \ubd84\uc0b0\uc740 \ub0ae\uc544\uc9d1\ub2c8\ub2e4. \uc774\ub294 \uba38\uc2e0\ub7ec\ub2dd\uc758 <a href=\"https:\/\/statorials.org\/ko\/\u1111\u1167\u11ab\u1112\u1163\u11bc-\u1107\u116e\u11ab\u1109\u1161\u11ab-\u110c\u1165\u11af\u110e\u116e\u11bc\/\" target=\"_blank\" rel=\"noopener noreferrer\">\ud3b8\ud5a5-\ubd84\uc0b0 \ud2b8\ub808\uc774\ub4dc\uc624\ud504\uc758<\/a> \uc804\ud615\uc801\uc778 \uc608\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc2e4\uc81c\ub85c \uc6b0\ub9ac\ub294 \uc77c\ubc18\uc801\uc73c\ub85c 5~10\uacb9\uc744 \uc0ac\uc6a9\ud558\ub3c4\ub85d \uc120\ud0dd\ud569\ub2c8\ub2e4. <a href=\"https:\/\/www.ime.unicamp.br\/~dias\/Intoduction%20to%20Statistical%20Learning.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><em>An Introduction to Statistical Learning<\/em><\/a> \uc5d0\uc11c \uc5b8\uae09\ud588\ub4ef\uc774 \uc774 \uc811\uae30 \uc218\ub294 \ud3b8\ud5a5\uacfc \ubd84\uc0b0 \uac04\uc758 \ucd5c\uc801\uc758 \uade0\ud615\uc744 \uc81c\uacf5\ud558\uc5ec \ud14c\uc2a4\ud2b8\uc758 MSE\uc5d0 \ub300\ud55c \uc2e0\ub8b0\ud560 \uc218 \uc788\ub294 \ucd94\uc815\uce58\ub97c \uc81c\uacf5\ud558\ub294 \uac83\uc73c\ub85c \ub098\ud0c0\ub0ac\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<blockquote>\n<p> <span style=\"color: #000000;\">\uc694\uc57d\ud558\uc790\uba74, k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc5d0\uc11c k\ub97c \uc120\ud0dd\ud558\ub294 \uac83\uacfc \uad00\ub828\ub41c \ud3b8\ud5a5-\ubd84\uc0b0 \ud2b8\ub808\uc774\ub4dc\uc624\ud504\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc77c\ubc18\uc801\uc73c\ub85c \uc774\ub7ec\ud55c \uace0\ub824 \uc0ac\ud56d\uc744 \uace0\ub824\ud560 \ub54c k = 5 \ub610\ub294 k = 10\uc744 \uc0ac\uc6a9\ud558\uc5ec k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc744 \uc218\ud589\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uac12\uc740 \uc9c0\ub098\uce58\uac8c \ub192\uc740 \ud3b8\ud5a5\uc774\ub098 \ub9e4\uc6b0 \ub192\uc740 \ubd84\uc0b0\uc744 \uacaa\uc9c0 \uc54a\ub294 \ud14c\uc2a4\ud2b8 \uc624\ub958\uc728 \ucd94\uc815\uce58\ub97c \uc0b0\ucd9c\ud558\ub294 \uac83\uc73c\ub85c \uacbd\ud5d8\uc801\uc73c\ub85c \ub098\ud0c0\ub0ac\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">-\ud398\uc774\uc9c0 184, <em>\ud1b5\uacc4 \ud559\uc2b5 \uc18c\uac1c<\/em><\/span><\/p>\n<\/blockquote>\n<h3> <span style=\"color: #000000;\"><strong>K-\ud3f4\ub4dc \uad50\ucc28 \uac80\uc99d\uc758 \uc774\uc810<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">\ub370\uc774\ud130 \uc138\ud2b8\ub97c \ub2e8\uc77c \ud6c8\ub828 \uc138\ud2b8\uc640 \ub2e8\uc77c \ud14c\uc2a4\ud2b8 \uc138\ud2b8\ub85c \ubd84\ud560\ud558\uba74 \ud14c\uc2a4\ud2b8 \uc138\ud2b8\uc758 \uad00\uce21\uac12\uc5d0 \ub300\ud574 \uacc4\uc0b0\ub41c \ud14c\uc2a4\ud2b8 MSE\ub294 \ud6c8\ub828 \uc138\ud2b8\uc640 \ud14c\uc2a4\ud2b8 \uc138\ud2b8\uc5d0 \uc0ac\uc6a9\ub41c \uad00\uce21\uac12\uc5d0 \ub530\ub77c \ud06c\uac8c \ub2ec\ub77c\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc744 \uc0ac\uc6a9\ud558\uba74 \ub2e4\uc591\ud55c \ud6c8\ub828 \ubc0f \ud14c\uc2a4\ud2b8 \uc138\ud2b8 \ubcc0\ud615\uc744 \uc0ac\uc6a9\ud558\uc5ec MSE \ud14c\uc2a4\ud2b8\ub97c \uacc4\uc0b0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \ud14c\uc2a4\ud2b8\uc758 MSE\uc5d0 \ub300\ud55c \ud3b8\uacac \uc5c6\ub294 \ucd94\uc815\uce58\ub97c \uc5bb\uc744 \uc218 \uc788\ub294 \ud6e8\uc52c \ub354 \ud070 \uae30\ud68c\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">K-\uacb9 \uad50\ucc28 \uac80\uc99d\uc740 \ub610\ud55c <a href=\"https:\/\/statorials.org\/ko\/\u1103\u1161\u11ab\u110b\u1175\u11af-\u1100\u116d\u110e\u1161-\u1100\u1165\u11b7\u110c\u1173\u11bc\u110b\u1173\u11af-\u1102\u1161\u11b7\u1100\u1167\u110c\u116e\u1109\u1166\u110b\u116d\/\" target=\"_blank\" rel=\"noopener noreferrer\">LOOCV(Leave-One-Out \uad50\ucc28 \uac80\uc99d)<\/a> \uc5d0 \ube44\ud574 \uacc4\uc0b0\uc0c1 \uc774\uc810\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc65c\ub0d0\ud558\uba74 \ubaa8\ub378\uc744 <em>n<\/em> \ubc88\uc774 \uc544\ub2cc <em>k<\/em> \ubc88\ub9cc \uc801\ud569\ud558\uba74 \ub418\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ud53c\ud305\ud558\ub294 \ub370 \uc624\ub79c \uc2dc\uac04\uc774 \uac78\ub9ac\ub294 \ubaa8\ub378\uc758 \uacbd\uc6b0 k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc740 LOOCV\ubcf4\ub2e4 \ud6e8\uc52c \ube60\ub974\uac8c \ud14c\uc2a4\ud2b8 MSE\ub97c \uacc4\uc0b0\ud560 \uc218 \uc788\uc73c\uba70 \ub9ce\uc740 \uacbd\uc6b0 \ucda9\ubd84\ud55c \uc218\uc758 \ud3f4\ub4dc\ub97c \uc0ac\uc6a9\ud558\uba74 \uac01 \uc811\uadfc \ubc29\uc2dd\uc73c\ub85c \uacc4\uc0b0\ub41c \ud14c\uc2a4\ud2b8 MSE\uac00 \uc0c1\ub2f9\ud788 \uc720\uc0ac\ud569\ub2c8\ub2e4.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>K-\ud3f4\ub4dc \uad50\ucc28 \uac80\uc99d \ud655\uc7a5<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc5d0\ub294 \ub2e4\uc74c\uc744 \ud3ec\ud568\ud558\uc5ec \uc5ec\ub7ec \uac00\uc9c0 \ud655\uc7a5\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>\ubc18\ubcf5\ub41c k-\uacb9 \uad50\ucc28 \uac80\uc99d:<\/strong> k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc774 \ub2e8\uc21c\ud788 <em>n<\/em> \ubc88 \ubc18\ubcf5\ub418\ub294 \uacbd\uc6b0\uc785\ub2c8\ub2e4. \ud6c8\ub828 \uc138\ud2b8\uc640 \ud14c\uc2a4\ud2b8 \uc138\ud2b8\uac00 \ud63c\ud569\ub420 \ub54c\ub9c8\ub2e4 \uc77c\ubc18 k-\uacb9 \uad50\ucc28 \uac80\uc99d\ubcf4\ub2e4 \uc644\ub8cc\ud558\ub294 \ub370 \uc2dc\uac04\uc774 \ub354 \uc624\ub798 \uac78\ub9ac\uc9c0\ub9cc \ud14c\uc2a4\ud2b8 MSE \ucd94\uc815\uc758 \ud3b8\ud5a5\uc774 \ub354\uc6b1 \uc904\uc5b4\ub4ed\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Leave-One-Out \uad50\ucc28 \uac80\uc99d:<\/strong> \uc774\uac83\uc740 <em>k<\/em> = <em>n<\/em> \uc778 k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc758 \ud2b9\ubcc4\ud55c \uacbd\uc6b0\uc785\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc5d0 \ub300\ud55c \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 <a href=\"https:\/\/statorials.org\/ko\/\u1103\u1161\u11ab\u110b\u1175\u11af-\u1100\u116d\u110e\u1161-\u1100\u1165\u11b7\u110c\u1173\u11bc\u110b\u1173\u11af-\u1102\u1161\u11b7\u1100\u1167\u110c\u116e\u1109\u1166\u110b\u116d\/\" target=\"_blank\" rel=\"noopener noreferrer\">\uc5ec\uae30\uc5d0\uc11c<\/a> \uc54c\uc544\ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>\uce35\ud654\ub41c k-\uacb9 \uad50\ucc28 \uac80\uc99d:<\/strong> \uc774\ub294 \uac01 \uc811\uae30\uac00 \uc804\uccb4\ub97c \ub300\ud45c\ud558\ub294 \ubc29\uc2dd\uc73c\ub85c \ub370\uc774\ud130 \uc138\ud2b8\ub97c \uc7ac\ubc30\uc5f4\ud558\ub294 k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc758 \ubc84\uc804\uc785\ub2c8\ub2e4. <a href=\"https:\/\/www.researchgate.net\/publication\/2352264_A_Study_of_Cross-Validation_and_Bootstrap_for_Accuracy_Estimation_and_Model_Selection\" target=\"_blank\" rel=\"noopener noreferrer\">Kohavi<\/a> \uac00 \uc5b8\uae09\ud55c \uac83\ucc98\ub7fc \uc774 \ubc29\ubc95\uc740 \uc77c\ubc18\uc801\uc778 k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc5d0 \ube44\ud574 \ud3b8\ud5a5\uacfc \ubd84\uc0b0 \uc0ac\uc774\uc5d0\uc11c \ub354 \ub098\uc740 \uade0\ud615\uc744 \uc81c\uacf5\ud558\ub294 \uacbd\ud5a5\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>\uc911\ucca9 \uad50\ucc28 \uac80\uc99d(Nested Cross-Validation):<\/strong> \uac01 \uad50\ucc28 \uac80\uc99d \uc811\uae30\uc5d0\uc11c k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc774 \uc218\ud589\ub418\ub294 \uacf3\uc785\ub2c8\ub2e4. \uc774\ub294 \ubaa8\ub378 \ud3c9\uac00 \uc911\uc5d0 \ud558\uc774\ud37c\ud30c\ub77c\ubbf8\ud130 \ud29c\ub2dd\uc744 \uc218\ud589\ud558\ub294 \ub370 \uc790\uc8fc \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ub370\uc774\ud130 \uc138\ud2b8\uc5d0 \ub300\ud55c \ubaa8\ub378\uc758 \uc131\ub2a5\uc744 \ud3c9\uac00\ud558\ub824\uba74 \ubaa8\ub378\uc758 \uc608\uce21\uc774 \uad00\ucc30\ub41c \ub370\uc774\ud130\uc640 \uc5bc\ub9c8\ub098 \uc798 \uc77c\uce58\ud558\ub294\uc9c0 \uce21\uc815\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \uce21\uc815\ud558\ub294 \uac00\uc7a5 \uc77c\ubc18\uc801\uc778 \ubc29\ubc95\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub418\ub294 \ud3c9\uade0 \uc81c\uacf1 \uc624\ucc28(MSE)\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. MSE = (1\/n)*\u03a3(y i \u2013 f( xi )) 2 \uae08: n: \ucd1d \uad00\uce21\uce58 \uc218 y i : i\ubc88\uc9f8 \uad00\uce21\uac12\uc758 \uc751\ub2f5 \uac12 f(x i ): i \ubc88\uc9f8 \uad00\uce21\uce58\uc758 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-1174","post","type-post","status-publish","format-standard","hentry","category-20"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>K-\ud3f4\ub4dc \uad50\ucc28 \uac80\uc99d\uc5d0 \ub300\ud55c \uac04\ub2e8\ud55c \uac00\uc774\ub4dc - Statorials<\/title>\n<meta name=\"description\" content=\"\uc774 \ud29c\ud1a0\ub9ac\uc5bc\uc5d0\uc11c\ub294 \uae30\uacc4 \ud559\uc2b5\uc5d0\uc11c \ubaa8\ub378 \uc131\ub2a5\uc744 \ud3c9\uac00\ud558\uae30 \uc704\ud574 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\ub294 \ubc29\ubc95\uc778 k-\uacb9 \uad50\ucc28 \uac80\uc99d\uc5d0 \ub300\ud574 \uc18c\uac1c\ud569\ub2c8\ub2e4.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/ko\/k-\u1100\u1167\u11b8-\u1100\u116d\u110e\u1161-\u1100\u1165\u11b7\u110c\u1173\u11bc\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"K-\ud3f4\ub4dc \uad50\ucc28 \uac80\uc99d\uc5d0 \ub300\ud55c \uac04\ub2e8\ud55c \uac00\uc774\ub4dc - 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