{"id":40786,"date":"2024-11-04T12:20:29","date_gmt":"2024-11-04T12:20:29","guid":{"rendered":"https:\/\/atmokpo.com\/w\/?p=40786"},"modified":"2024-11-26T06:38:27","modified_gmt":"2024-11-26T06:38:27","slug":"43-%eb%a1%9c%ec%a7%80%ec%8a%a4%ed%8b%b1-%ed%9a%8c%ea%b7%80logistic-regression-%eb%a1%9c%ec%a7%80%ec%8a%a4%ed%8b%b1-%ed%9a%8c%ea%b7%80%ec%9d%98-%ea%b0%9c%eb%85%90%ea%b3%bc-%eb%a1%9c%ea%b7%b8","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/40786\/","title":{"rendered":"43.\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0(Logistic Regression), \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc758 \uac1c\ub150\uacfc \ub85c\uadf8 \uc624\uc988(odds)"},"content":{"rendered":"<p><body><\/p>\n<article>\n<p>\n            \ud1b5\uacc4\ud559\uacfc \uae30\uacc4 \ud559\uc2b5 \ubd84\uc57c\uc5d0\uc11c \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0(Logistic Regression)\ub294 \ubc94\uc8fc\ud615 \uc885\uc18d \ubcc0\uc218\ub97c \uc608\uce21\ud558\uae30 \uc704\ud574 \uc790\uc8fc \uc0ac\uc6a9\ub418\ub294 \ud68c\uadc0 \ubd84\uc11d \ubc29\ubc95\uc785\ub2c8\ub2e4. \ud2b9\ud788 \uc774 \ubc29\ubc95\uc740 \uc774\ud56d \ubd84\ub958 \ubb38\uc81c\uc5d0 \ub9e4\uc6b0 \uc720\uc6a9\ud558\uba70, \uc9c8\ubcd1 \uc9c4\ub2e8, \uc2a4\ud338 \ubd84\ub958 \ub4f1\uc758 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \uc801\uc6a9\ub429\ub2c8\ub2e4.\n        <\/p>\n<h2>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ub780?<\/h2>\n<p>\n            \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ub294 \ub3c5\ub9bd \ubcc0\uc218\uc758 \uc120\ud615 \uc870\ud569\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc885\uc18d \ubcc0\uc218\uac00 \ud2b9\uc815 \ud074\ub798\uc2a4\uc5d0 \uc18d\ud560 \ud655\ub960\uc744 \uc608\uce21\ud558\ub294 \ubaa8\ub378\uc785\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc778 \uc120\ud615 \ud68c\uadc0\uc640 \ub2ec\ub9ac, \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ub294 \uc608\uce21\ub41c \ud655\ub960\uac12\uc744 \ub85c\uadf8 \uc624\uc988(odds) \ube44\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubcc0\ud658\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uacb0\uacfc\uac12\uc744 0\uacfc 1 \uc0ac\uc774\uc758 \uac12\uc73c\ub85c \uc81c\ud55c\ud558\uba70, \uc774\ub97c \ud1b5\ud574 \uc774\ud56d \ubd84\ub958 \ubb38\uc81c\ub97c \ud6a8\uacfc\uc801\uc73c\ub85c \ud574\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\n        <\/p>\n<h3>\ub85c\uc9c0\uc2a4\ud2f1 \ud568\uc218<\/h3>\n<p>\n            \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc5d0\uc11c \uc0ac\uc6a9\ud558\ub294 \ub85c\uc9c0\uc2a4\ud2f1 \ud568\uc218\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc815\uc758\ub429\ub2c8\ub2e4:\n        <\/p>\n<p style=\"text-align:center;\">\n<img decoding=\"async\" alt=\"\ub85c\uc9c0\uc2a4\ud2f1 \ud568\uc218\" src=\"https:\/\/via.placeholder.com\/300?text=%22p(y=1|x)=\\\\frac{1}{1+e^{-(\\\\beta_0+\\\\beta_1 x_1+\\\\beta_2 x_2+...+\\\\beta_k x_k)}}%22\"\/>\n<\/p>\n<p>\n            \uc5ec\uae30\uc11c \\( p(y=1|x) \\)\ub294 \uc8fc\uc5b4\uc9c4 \\( x \\)\uc5d0 \ub300\ud55c \uc885\uc18d \ubcc0\uc218 \\( y \\)\uac00 1\uc77c \ud655\ub960\uc744 \ub098\ud0c0\ub0b4\uace0, \\( \\beta_0, \\beta_1, \\ldots, \\beta_k \\)\ub294 \uac01 \ub3c5\ub9bd \ubcc0\uc218\uc758 \ud68c\uadc0 \uacc4\uc218\uc785\ub2c8\ub2e4.\n        <\/p>\n<h2>\ub85c\uadf8 \uc624\uc988(odds) \uac1c\ub150<\/h2>\n<p>\n            \ub85c\uadf8 \uc624\uc988\ub294 \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc758 \ud575\uc2ec \uac1c\ub150 \uc911 \ud558\ub098\uc785\ub2c8\ub2e4. \uba3c\uc800 \uc624\uc988(odds)\ub97c \uc774\ud574\ud574\uc57c \ud569\ub2c8\ub2e4. \uc624\uc988\ub294 \uc0ac\uac74\uc774 \ubc1c\uc0dd\ud560 \ud655\ub960\uacfc \ubc1c\uc0dd\ud558\uc9c0 \uc54a\uc744 \ud655\ub960\uc758 \ube44\uc728\ub85c \uc815\uc758\ub429\ub2c8\ub2e4. \uc989,\n        <\/p>\n<p style=\"text-align:center;\">\n<img decoding=\"async\" alt=\"\uc624\uc988\" src=\"https:\/\/via.placeholder.com\/300?text=%22odds=\\\\frac{p}{1-p}%22\"\/>\n<\/p>\n<p>\n            \uc5ec\uae30\uc11c \\( p \\)\ub294 \uc0ac\uac74\uc774 \ubc1c\uc0dd\ud560 \ud655\ub960\uc785\ub2c8\ub2e4. \uc774 \uc624\uc988\uc758 \ub85c\uadf8\ub97c \ucde8\ud55c \uac83\uc774 \ubc14\ub85c \ub85c\uadf8 \uc624\uc988\uc785\ub2c8\ub2e4:\n        <\/p>\n<p style=\"text-align:center;\">\n<img decoding=\"async\" alt=\"\ub85c\uadf8 \uc624\uc988\" src=\"https:\/\/via.placeholder.com\/300?text=%22log(odds)=log\\\\left(\\\\frac{p}{1-p}\\\\right)%22\"\/>\n<\/p>\n<h3>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc5d0\uc11c\uc758 \ub85c\uadf8 \uc624\uc988<\/h3>\n<p>\n            \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubaa8\ub378\uc5d0\uc11c \ub85c\uadf8 \uc624\uc988\ub294 \ub3c5\ub9bd \ubcc0\uc218\ub97c \ud1b5\ud574 \ub2e4\uc74c\uacfc \uac19\uc774 \ud45c\ud604\ub429\ub2c8\ub2e4:\n        <\/p>\n<p style=\"text-align:center;\">\n<img decoding=\"async\" alt=\"\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ub85c\uadf8 \uc624\uc988\" src=\"https:\/\/via.placeholder.com\/300?text=%22log(odds)=\\\\beta_0+\\\\beta_1 x_1+\\\\beta_2 x_2+...+\\\\beta_k x_k%22\"\/>\n<\/p>\n<p>\n            \uc774 \uc2dd\uc740 \uc885\uc18d \ubcc0\uc218\uac00 1\uc77c \ud655\ub960\uc744 \uc624\uc988\uc758 \ud615\ud0dc\ub85c \ub098\ud0c0\ub0b4\uba70, \ubcc0\uc218\uc758 \ubcc0\ud654\uac00 \uc624\uc988\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \ud574\uc11d\ud558\ub294 \ub370 \uc911\uc694\ud569\ub2c8\ub2e4. \uac01 \ud68c\uadc0 \uacc4\uc218 \\( \\beta_i \\)\ub294 \ud574\ub2f9 \ub3c5\ub9bd \ubcc0\uc218 \\( x_i \\)\uac00 \ub85c\uadf8 \uc624\uc988\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4.\n        <\/p>\n<h2>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc758 \ud65c\uc6a9 \uc608\uc2dc<\/h2>\n<p>\n            \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ub294 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \ud65c\uc6a9\ub429\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \uc758\ud559 \ubd84\uc57c\uc5d0\uc11c\ub294 \ud658\uc790\uac00 \ud2b9\uc815 \uc9c8\ubcd1\uc5d0 \uac78\ub9b4 \ud655\ub960\uc744 \uc608\uce21\ud558\uae30 \uc704\ud574 \uc0ac\uc6a9\ub418\uba70, \ub9c8\ucf00\ud305\uc5d0\uc11c\ub294 \uace0\uac1d\uc774 \ud2b9\uc815 \uc81c\ud488\uc744 \uad6c\ub9e4\ud560 \ud655\ub960\uc744 \uc608\uce21\ud558\ub294 \ub370 \ud65c\uc6a9\ub429\ub2c8\ub2e4.\n        <\/p>\n<h3>\uc608\uc81c: \uc9c8\ubcd1 \uc9c4\ub2e8<\/h3>\n<p>\n            \uac00\uc0c1\uc758 \ub370\uc774\ud130\uc14b\uc744 \ud1b5\ud574 \uc9c8\ubcd1 \uc9c4\ub2e8 \ubaa8\ub378\uc744 \uc0dd\uc131\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \ub370\uc774\ud130\uc14b\uc740 \uc5ec\ub7ec \uac00\uc9c0 \uac74\uac15 \uc9c0\ud45c\uc640 \ud658\uc790\uac00 \uc9c8\ubcd1\uc5d0 \uac78\ub838\ub294\uc9c0 \uc5ec\ubd80(1 = \uc9c8\ubcd1 \uc788\uc74c, 0 = \uc9c8\ubcd1 \uc5c6\uc74c)\uc5d0 \ub300\ud55c \uc815\ubcf4\ub97c \ud3ec\ud568\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.\n        <\/p>\n<ol>\n<li>\ub3c5\ub9bd \ubcc0\uc218: \ub098\uc774, \ud608\uc555, \ud608\uc911 \ucf5c\ub808\uc2a4\ud14c\ub864<\/li>\n<li>\uc885\uc18d \ubcc0\uc218: \uc9c8\ubcd1 \uc5ec\ubd80 (0 \ub610\ub294 1)<\/li>\n<\/ol>\n<h4>\ub2e8\uacc4 1: \ub370\uc774\ud130 \uc900\ube44<\/h4>\n<p>\n            \ucc98\uc74c\uc5d0\ub294 \ub370\uc774\ud130\ub97c \uc218\uc9d1\ud558\uace0 \uc804\ucc98\ub9ac\ud569\ub2c8\ub2e4. \uacb0\uce21\uce58\ub97c \ucc98\ub9ac\ud558\uace0, \ud544\uc694\ud55c \uacbd\uc6b0 \ubcc0\uc218 \ubcc0\ud658\uc744 \ud1b5\ud574 \ub370\uc774\ud130\uc758 \ud488\uc9c8\uc744 \ub192\uc785\ub2c8\ub2e4. \uc774 \ud6c4, \ub370\uc774\ud130\ub97c \ud559\uc2b5\uc14b\uacfc \uac80\uc99d\uc14b\uc73c\ub85c \ub098\ub204\uc5b4 \ubaa8\ub378 \ud6c8\ub828\uacfc \ud3c9\uac00\ub97c \uc9c4\ud589\ud558\uac8c \ub429\ub2c8\ub2e4.\n        <\/p>\n<h4>\ub2e8\uacc4 2: \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubaa8\ub378 \ud6c8\ub828<\/h4>\n<p>\n            \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubaa8\ub378\uc744 \ud6c8\ub828\ud558\uae30 \uc704\ud574 \ub3c5\ub9bd \ubcc0\uc218\uc640 \uc885\uc18d \ubcc0\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubaa8\ub378\uc744 \ud559\uc2b5\ud569\ub2c8\ub2e4. \ud559\uc2b5 \uacfc\uc815\uc5d0\uc11c\ub294 \uc8fc\uc5b4\uc9c4 \ub370\uc774\ud130\ub97c \ud1b5\ud574 \ud68c\uadc0 \uacc4\uc218\ub97c \ucd5c\uc801\ud654\ud569\ub2c8\ub2e4.\n        <\/p>\n<h4>\ub2e8\uacc4 3: \ubaa8\ub378 \ud3c9\uac00<\/h4>\n<p>\n            \ud6c8\ub828\ub41c \ubaa8\ub378\uc744 \uac80\uc99d \ub370\uc774\ud130\uc14b\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud3c9\uac00\ud569\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \uc815\ud655\ub3c4, \uc815\ubc00\ub3c4, \uc7ac\ud604\uc728\uc744 \ud1b5\ud574 \ubaa8\ub378\uc758 \uc131\ub2a5\uc744 \uce21\uc815\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ubaa8\ub378\uc774 \uc2e4\uc81c\ub85c \uc9c8\ubcd1\uc744 \uc798 \uc608\uce21\ud560 \uc218 \uc788\ub294\uc9c0\ub97c \ud310\ub2e8\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\n        <\/p>\n<h3>\ud574\uc11d \ubc0f \uc2dc\uac01\ud654<\/h3>\n<p>\n            \ud6c8\ub828\ub41c \ubaa8\ub378\uc758 \ud68c\uadc0 \uacc4\uc218\ub97c \ud574\uc11d\ud558\uc5ec \uac01 \ub3c5\ub9bd \ubcc0\uc218\uac00 \uc9c8\ubcd1 \ubc1c\uc0dd\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \uc0b4\ud3b4\ubd05\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ub098\uc774\uac00 \ud55c \uc0b4 \uc99d\uac00\ud560 \ub54c \uc9c8\ubcd1 \ud655\ub960\uc774 \uba87 \ubc30 \uc99d\uac00\ud558\ub294\uc9c0\uc5d0 \ub300\ud55c \ud574\uc11d\uc774 \uac00\ub2a5\ud569\ub2c8\ub2e4. \ub610\ud55c, ROC \uace1\uc120\uacfc \uac19\uc740 \uc2dc\uac01\uc801 \ub3c4\uad6c\ub97c \ud1b5\ud574 \ubaa8\ub378\uc758 \ubd84\ub958 \uc131\ub2a5\uc744 \ud3c9\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\n        <\/p>\n<h2>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc758 \uc7a5\ub2e8\uc810<\/h2>\n<h3>\uc7a5\uc810<\/h3>\n<ul>\n<li>\uacb0\uacfc \ud574\uc11d\uc774 \uc6a9\uc774\ud558\ub2e4.<\/li>\n<li>\uc774\ud56d \ubd84\ub958 \ubb38\uc81c\uc5d0 \ud6a8\uacfc\uc801\uc774\ub2e4.<\/li>\n<li>\ud655\ub960\uc744 \ucd94\uc815\ud560 \uc218 \uc788\uc5b4 \ubd88\ud655\uc2e4\uc131\uc744 \ubc18\uc601\ud55c\ub2e4.<\/li>\n<\/ul>\n<h3>\ub2e8\uc810<\/h3>\n<ul>\n<li>\ub3c5\ub9bd \ubcc0\uc218 \uac04\uc758 \ub3c5\ub9bd\uc131\uc774 \uc694\uad6c\ub41c\ub2e4.<\/li>\n<li>\ube44\uc120\ud615 \uad00\uacc4\ub97c \uc9c1\uc811\uc801\uc73c\ub85c \ubaa8\ub378\ub9c1\ud560 \uc218 \uc5c6\ub2e4.<\/li>\n<li>\ub2e4\uc911 \uacf5\uc120\uc131 \ubb38\uc81c\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub2e4.<\/li>\n<\/ul>\n<h2>\uacb0\ub860<\/h2>\n<p>\n            \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ub294 \uc774\ud56d \ubd84\ub958 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud55c \ud6a8\uacfc\uc801\uc778 \ud1b5\uacc4 \uae30\ubc95\uc785\ub2c8\ub2e4. \ub85c\uadf8 \uc624\uc988\uc758 \uac1c\ub150\uc744 \ubc14\ud0d5\uc73c\ub85c \ud655\ub960\uc744 \uc608\uce21\ud558\uace0 \uadf8 \uacb0\uacfc\ub97c \ud574\uc11d\ud560 \uc218 \uc788\ub2e4\ub294 \uc810\uc5d0\uc11c \uc720\uc6a9\ud569\ub2c8\ub2e4. \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \ud65c\uc6a9 \uac00\ub2a5\ud558\uba70, \ud2b9\ud788 \uc758\ub8cc\uc640 \ub9c8\ucf00\ud305 \ub370\uc774\ud130 \ubd84\uc11d\uc5d0\uc11c \ub450\uac01\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4.\n        <\/p>\n<h2>\ucc38\uace0 \ubb38\ud5cc<\/h2>\n<ul>\n<li>Kuhn, M., &amp; Johnson, K. (2013). Applied Predictive Modeling. Springer.<\/li>\n<li>James, G., Witten, D., Hastie, T., &amp; Tibshirani, R. (2013). An Introduction to Statistical Learning. Springer.<\/li>\n<\/ul>\n<\/article>\n<p><\/body><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud1b5\uacc4\ud559\uacfc \uae30\uacc4 \ud559\uc2b5 \ubd84\uc57c\uc5d0\uc11c \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0(Logistic Regression)\ub294 \ubc94\uc8fc\ud615 \uc885\uc18d \ubcc0\uc218\ub97c \uc608\uce21\ud558\uae30 \uc704\ud574 \uc790\uc8fc \uc0ac\uc6a9\ub418\ub294 \ud68c\uadc0 \ubd84\uc11d \ubc29\ubc95\uc785\ub2c8\ub2e4. \ud2b9\ud788 \uc774 \ubc29\ubc95\uc740 \uc774\ud56d \ubd84\ub958 \ubb38\uc81c\uc5d0 \ub9e4\uc6b0 \uc720\uc6a9\ud558\uba70, \uc9c8\ubcd1 \uc9c4\ub2e8, \uc2a4\ud338 \ubd84\ub958 \ub4f1\uc758 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \uc801\uc6a9\ub429\ub2c8\ub2e4. \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ub780? \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ub294 \ub3c5\ub9bd \ubcc0\uc218\uc758 \uc120\ud615 \uc870\ud569\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc885\uc18d \ubcc0\uc218\uac00 \ud2b9\uc815 \ud074\ub798\uc2a4\uc5d0 \uc18d\ud560 \ud655\ub960\uc744 \uc608\uce21\ud558\ub294 \ubaa8\ub378\uc785\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc778 \uc120\ud615 \ud68c\uadc0\uc640 \ub2ec\ub9ac, \ub85c\uc9c0\uc2a4\ud2f1 &hellip; <a href=\"https:\/\/atmokpo.com\/w\/40786\/\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;43.\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0(Logistic Regression), \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc758 \uac1c\ub150\uacfc \ub85c\uadf8 \uc624\uc988(odds)&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[219],"tags":[],"class_list":["post-40786","post","type-post","status-publish","format-standard","hentry","category-219"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - 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