{"id":740,"date":"2024-07-11T08:17:56","date_gmt":"2024-07-11T08:17:56","guid":{"rendered":"http:\/\/www.ohsumin.com\/?p=740"},"modified":"2025-06-11T01:23:00","modified_gmt":"2025-06-11T01:23:00","slug":"%eb%a1%9c%ec%a7%80%ec%8a%a4%ed%8b%b1-%eb%b6%84%ec%84%9dlogistic-analysis","status":"publish","type":"post","link":"http:\/\/www.inmining.co.kr\/?p=740","title":{"rendered":"\ub85c\uc9c0\uc2a4\ud2f1 \ubd84\uc11d(Logistic Analysis)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ubd84\uc11d(Logistic Regression Analysis)\uc740 \uc885\uc18d \ubcc0\uc218\uac00 \uc774\uc9c4(binary) \ub610\ub294 \ub2e4\ubc94\uc8fc(multi-category)\uc778 \uacbd\uc6b0\uc5d0 \uc0ac\uc6a9\ub418\ub294 \ud1b5\uacc4\uc801 \ubd84\uc11d \uae30\ubc95\uc785\ub2c8\ub2e4. \uc8fc\ub85c \uc0ac\uac74\uc758 \ubc1c\uc0dd \uc5ec\ubd80\ub97c \uc608\uce21\ud558\uac70\ub098 \ubc94\uc8fc\ud615 \uacb0\uacfc\ub97c \uc124\uba85\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<br>\\(\\)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EB%A1%9C%EC%A7%80%EC%8A%A4%ED%8B%B1_%ED%9A%8C%EA%B7%80%EC%9D%98_%EA%B8%B0%EB%B3%B8_%EA%B0%9C%EB%85%90\"><\/span>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc758 \uae30\ubcf8 \uac1c\ub150<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\uc885\uc18d \ubcc0\uc218 (Dependent Variable)<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc774\uc9c4 \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0: \uc885\uc18d \ubcc0\uc218\uac00 \ub450 \uac00\uc9c0 \ubc94\uc8fc(\uc608: \uc131\uacf5\/\uc2e4\ud328, \ucc38\/\uac70\uc9d3)\ub85c \uc774\ub8e8\uc5b4\uc838 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\ub2e4\ud56d \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0: \uc885\uc18d \ubcc0\uc218\uac00 \uc138 \uac00\uc9c0 \uc774\uc0c1\uc758 \ubc94\uc8fc(\uc608: \uace0\/\uc911\/\uc800)\ub85c \uc774\ub8e8\uc5b4\uc838 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ub3c5\ub9bd \ubcc0\uc218 (Independent Variables)<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc885\uc18d \ubcc0\uc218\uc5d0 \uc601\ud5a5\uc744 \ubbf8\uce58\ub294 \ubcc0\uc218\ub4e4\ub85c, \uc5f0\uc18d\ud615 \ub610\ub294 \ubc94\uc8fc\ud615\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EB%A1%9C%EC%A7%80%EC%8A%A4%ED%8B%B1_%ED%9A%8C%EA%B7%80%EC%9D%98_%EC%88%98%ED%95%99%EC%A0%81_%EB%AA%A8%EB%8D%B8\"><\/span>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc758 \uc218\ud559\uc801 \ubaa8\ub378<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\uc774\uc9c4 \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc5d0\uc11c \uc885\uc18d \ubcc0\uc218 ( Y )\ub294 0 \ub610\ub294 1\uc758 \uac12\uc744 \uac00\uc9d1\ub2c8\ub2e4. \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubaa8\ub378\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \ud615\ud0dc\ub97c \uac00\uc9d1\ub2c8\ub2e4:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\\[ \\text{logit}(P) = \\ln\\left(\\frac{P}{1-P}\\right) = \\beta_0 + \\beta_1X_1 + \\beta_2X_2 + \\ldots + \\beta_kX_k \\]<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc5ec\uae30\uc11c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\\( P )\ub294 \uc885\uc18d \ubcc0\uc218\uac00 1\uc77c \ud655\ub960\uc785\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\\( \\beta_0 \\)\ub294 \uc808\ud3b8(intercept)\uc785\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\\( \\beta_i \\)\ub294 \uac01 \ub3c5\ub9bd \ubcc0\uc218 \\( X_i \\)\uc758 \ud68c\uadc0 \uacc4\uc218\uc785\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EB%A1%9C%EC%A7%80%EC%8A%A4%ED%8B%B1_%ED%95%A8%EC%88%98\"><\/span>\ub85c\uc9c0\uc2a4\ud2f1 \ud568\uc218<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\uc704\uc758 \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubc29\uc815\uc2dd\uc744 \ud655\ub960 \ud615\ud0dc\ub85c \ubcc0\ud658\ud558\uba74 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\\[ P(Y=1|X) = \\frac{1}{1 + e^{-(\\beta_0 + \\beta_1X_1 + \\beta_2X_2 + \\ldots + \\beta_kX_k)}} \\]<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc774 \ud568\uc218\ub294 \uc785\ub825 \ubcc0\uc218\uc758 \uc120\ud615 \uacb0\ud569\uc744 \ud655\ub960 \uac12\uc73c\ub85c \ubcc0\ud658\ud558\ub294 S-\uace1\uc120(S-curve)\uc744 \uadf8\ub9bd\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EB%A1%9C%EC%A7%80%EC%8A%A4%ED%8B%B1_%ED%9A%8C%EA%B7%80%EC%9D%98_%EB%8B%A8%EA%B3%84\"><\/span>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc758 \ub2e8\uacc4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ub370\uc774\ud130 \uc900\ube44<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ub3c5\ub9bd \ubcc0\uc218\uc640 \uc885\uc18d \ubcc0\uc218\ub97c \ud3ec\ud568\ud558\ub294 \ub370\uc774\ud130\ub97c \uc900\ube44\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ubaa8\ub378 \uc801\ud569 (Model Fitting)<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ub370\uc774\ud130\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubaa8\ub378\uc744 \uc801\ud569\uc2dc\ud0b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ubaa8\ub378 \ud3c9\uac00 (Model Evaluation)<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ubaa8\ub378\uc758 \uc131\ub2a5\uc744 \ud3c9\uac00\ud569\ub2c8\ub2e4. \uc8fc\uc694 \uc9c0\ud45c\ub85c\ub294 \uc815\ud655\ub3c4(accuracy), \ubbfc\uac10\ub3c4(sensitivity), \ud2b9\uc774\ub3c4(specificity), AUC-ROC \uace1\uc120(area under the ROC curve) \ub4f1\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ud574\uc11d (Interpretation)<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud68c\uadc0 \uacc4\uc218\ub97c \ud574\uc11d\ud558\uc5ec \ub3c5\ub9bd \ubcc0\uc218\uac00 \uc885\uc18d \ubcc0\uc218\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \ud3c9\uac00\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EB%A1%9C%EC%A7%80%EC%8A%A4%ED%8B%B1_%ED%9A%8C%EA%B7%80_%EB%B6%84%EC%84%9D%EC%9D%98_%EC%98%88%EC%8B%9C_Python_%EC%82%AC%EC%9A%A9\"><\/span>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubd84\uc11d\uc758 \uc608\uc2dc (Python \uc0ac\uc6a9)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\uc544\ub798\ub294 Python\uc758 <code>statsmodels<\/code>\uc640 <code>sklearn<\/code> \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubd84\uc11d\uc744 \uc218\ud589\ud558\ub294 \uc608\uc81c\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import pandas as pd\nimport numpy as np\nimport statsmodels.api as sm\nfrom sklearn.model_selection import train_test_split\nfrom sklearn.linear_model import LogisticRegression\nfrom sklearn.metrics import accuracy_score, roc_auc_score, roc_curve\nimport matplotlib.pyplot as plt\n\n# \uc608\uc2dc \ub370\uc774\ud130 \uc0dd\uc131\nnp.random.seed(0)\ndata = pd.DataFrame({\n    'Age': np.random.randint(18, 70, 100),\n    'Income': np.random.randint(20000, 80000, 100),\n    'Education': np.random.randint(1, 5, 100),\n    'Purchase': np.random.randint(0, 2, 100)  # 0 \ub610\ub294 1\uc758 \uc774\uc9c4 \uc885\uc18d \ubcc0\uc218\n})\n\n# \ub3c5\ub9bd \ubcc0\uc218\uc640 \uc885\uc18d \ubcc0\uc218 \uc124\uc815\nX = data&#091;&#091;'Age', 'Income', 'Education']]\ny = data&#091;'Purchase']\n\n# \ub370\uc774\ud130 \ubd84\ud560 (\ud6c8\ub828 \ub370\uc774\ud130\uc640 \ud14c\uc2a4\ud2b8 \ub370\uc774\ud130)\nX_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.3, random_state=0)\n\n# statsmodels\ub97c \uc0ac\uc6a9\ud55c \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubd84\uc11d\nX_train_sm = sm.add_constant(X_train)  # \uc808\ud3b8 \ucd94\uac00\nmodel_sm = sm.Logit(y_train, X_train_sm)\nresult = model_sm.fit()\nprint(result.summary())\n\n# sklearn\ub97c \uc0ac\uc6a9\ud55c \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubd84\uc11d\nmodel_sklearn = LogisticRegression()\nmodel_sklearn.fit(X_train, y_train)\n\n# \uc608\uce21 \ubc0f \ud3c9\uac00\ny_pred = model_sklearn.predict(X_test)\naccuracy = accuracy_score(y_test, y_pred)\nroc_auc = roc_auc_score(y_test, model_sklearn.predict_proba(X_test)&#091;:, 1])\n\nprint(f'Accuracy: {accuracy}')\nprint(f'ROC AUC: {roc_auc}')\n\n# ROC \uace1\uc120 \uadf8\ub9ac\uae30\nfpr, tpr, thresholds = roc_curve(y_test, model_sklearn.predict_proba(X_test)&#091;:, 1])\nplt.figure()\nplt.plot(fpr, tpr, color='darkorange', lw=2, label=f'ROC curve (area = {roc_auc:.2f})')\nplt.plot(&#091;0, 1], &#091;0, 1], color='navy', lw=2, linestyle='--')\nplt.xlim(&#091;0.0, 1.0])\nplt.ylim(&#091;0.0, 1.05])\nplt.xlabel('False Positive Rate')\nplt.ylabel('True Positive Rate')\nplt.title('Receiver Operating Characteristic (ROC)')\nplt.legend(loc=\"lower right\")\nplt.show()<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EA%B2%B0%EA%B3%BC_%ED%95%B4%EC%84%9D\"><\/span>\uacb0\uacfc \ud574\uc11d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ud68c\uadc0 \uacc4\uc218<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uac01 \ub3c5\ub9bd \ubcc0\uc218\uc758 \ud68c\uadc0 \uacc4\uc218\ub294 \ud574\ub2f9 \ubcc0\uc218\uac00 \uc885\uc18d \ubcc0\uc218\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\uc608\ub97c \ub4e4\uc5b4, <code>Age<\/code>\uc758 \ud68c\uadc0 \uacc4\uc218\uac00 \uc591\uc218\ub77c\uba74, \ub098\uc774\uac00 \uc99d\uac00\ud560\uc218\ub85d \uad6c\ub9e4\ud560 \ud655\ub960\uc774 \ub192\uc544\uc9d0\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ubaa8\ub378 \ud3c9\uac00<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\uc815\ud655\ub3c4 (Accuracy)<\/strong>: \uc608\uce21\uc774 \uc2e4\uc81c \uac12\uacfc \uc5bc\ub9c8\ub098 \uc77c\uce58\ud558\ub294\uc9c0\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>ROC AUC<\/strong>: \ubaa8\ub378\uc758 \ubd84\ub958 \uc131\ub2a5\uc744 \ud3c9\uac00\ud558\ub294 \uc9c0\ud45c\ub85c, 1\uc5d0 \uac00\uae4c\uc6b8\uc218\ub85d \uc131\ub2a5\uc774 \uc88b\uc74c\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ROC \uace1\uc120<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ROC \uace1\uc120\uc740 \ucc38 \uc591\uc131 \ube44\uc728(TPR)\uacfc \uac70\uc9d3 \uc591\uc131 \ube44\uc728(FPR) \uac04\uc758 \uad00\uacc4\ub97c \ub098\ud0c0\ub0b4\uba70, \ubaa8\ub378\uc758 \uc131\ub2a5\uc744 \uc2dc\uac01\uc801\uc73c\ub85c \ud3c9\uac00\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EC%9A%94%EC%95%BD\"><\/span>\uc694\uc57d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubd84\uc11d\uc740 \uc774\uc9c4 \ub610\ub294 \ubc94\uc8fc\ud615 \uc885\uc18d \ubcc0\uc218\ub97c \uc608\uce21\ud558\uae30 \uc704\ud55c \uac15\ub825\ud55c \ud1b5\uacc4 \uae30\ubc95\uc785\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ub3c5\ub9bd \ubcc0\uc218\ub4e4\uc774 \uc885\uc18d \ubcc0\uc218\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \ubd84\uc11d\ud558\uace0, \uc608\uce21 \ubaa8\ub378\uc744 \uad6c\ucd95\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. Python\uc758 <code>statsmodels<\/code>\uc640 <code>sklearn<\/code> \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\uba74 \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0 \ubd84\uc11d\uc744 \uc27d\uac8c \uc218\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"5\" src=\"http:\/\/www.ohsumin.com\/sm24_wp\/wp-content\/uploads\/2024\/07\/line-30-1024x5.jpg\" alt=\"\" class=\"wp-image-1217\" srcset=\"http:\/\/www.inmining.co.kr\/sm24_wp\/wp-content\/uploads\/2024\/07\/line-30-1024x5.jpg 1024w, http:\/\/www.inmining.co.kr\/sm24_wp\/wp-content\/uploads\/2024\/07\/line-30-300x1.jpg 300w, http:\/\/www.inmining.co.kr\/sm24_wp\/wp-content\/uploads\/2024\/07\/line-30-768x4.jpg 768w, http:\/\/www.inmining.co.kr\/sm24_wp\/wp-content\/uploads\/2024\/07\/line-30-1536x7.jpg 1536w, http:\/\/www.inmining.co.kr\/sm24_wp\/wp-content\/uploads\/2024\/07\/line-30-2048x10.jpg 2048w, http:\/\/www.inmining.co.kr\/sm24_wp\/wp-content\/uploads\/2024\/07\/line-30-1320x6.jpg 1320w, http:\/\/www.inmining.co.kr\/sm24_wp\/wp-content\/uploads\/2024\/07\/line-30-920x4.jpg 920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EB%A1%9C%EC%A7%80%EC%8A%A4%ED%8B%B1%EA%B3%BC_%EB%A1%9C%EC%A7%93_%EB%B9%84%EA%B5%90\"><\/span>\ub85c\uc9c0\uc2a4\ud2f1\uacfc \ub85c\uc9d3 \ube44\uad50<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0(Logistic Regression)\uc640 \ub85c\uc9d3 \ubaa8\ub378(Logit Model)\uc740 \uc885\uc885 \ud63c\uc6a9\ub418\uc9c0\ub9cc, \ub450 \uc6a9\uc5b4\ub294 \uc2e4\uc81c\ub85c \ube44\uc2b7\ud55c \uac1c\ub150\uc744 \ub2e4\ub8e8\uba74\uc11c\ub3c4 \uc57d\uac04\uc758 \ucc28\uc774\uac00 \uc788\uc2b5\ub2c8\ub2e4. \uae30\ubcf8\uc801\uc73c\ub85c \ub450 \uac1c\ub150 \ubaa8\ub450 \uc774\uc9c4 \uc885\uc18d \ubcc0\uc218\ub97c \uc608\uce21\ud558\uae30 \uc704\ud55c \ud68c\uadc0 \ubaa8\ub378\ub85c \uc0ac\uc6a9\ub418\uc9c0\ub9cc, \uc0ac\uc6a9\ub418\ub294 \ub9e5\ub77d\uacfc \uc6a9\uc5b4\uc758 \uae30\uc6d0\uc5d0 \ub530\ub77c \ucc28\uc774\uac00 \uc788\uc2b5\ub2c8\ub2e4.<br><strong>\uc989, \ub3d9\uc77c\ud55c \uc218\ud559\uc801 \uacf5\uc2dd\uc744 \uae30\ubc18\uc73c\ub85c \uac1c\ub150\ub9cc \ud544\uc694\uc5d0 \uc758\ud574\uc11c \uad6c\ubd84\ud55c\ub2e4\uace0 \ubcf4\uba74\ub41c\ub2e4. \uadf8\ub0e5 \ub3d9\uc77c\ud558\uac8c \uc0ac\uc6a9\ud574\ub3c4 \ubb34\uad00\ud558\ub2e4.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\\(\\)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EB%A1%9C%EC%A7%80%EC%8A%A4%ED%8B%B1_%ED%9A%8C%EA%B7%80Logistic_Regression\"><\/span>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0(Logistic Regression)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ub294 \ub3c5\ub9bd \ubcc0\uc218\uc640 \uc885\uc18d \ubcc0\uc218 \uac04\uc758 \uad00\uacc4\ub97c \ubaa8\ub378\ub9c1\ud558\uc5ec \uc885\uc18d \ubcc0\uc218\uac00 \ud2b9\uc815 \ubc94\uc8fc(\uc8fc\ub85c 0 \ub610\ub294 1)\ub97c \uac00\uc9c8 \ud655\ub960\uc744 \uc608\uce21\ud558\ub294 \ud1b5\uacc4 \uae30\ubc95\uc785\ub2c8\ub2e4. \uc774 \uae30\ubc95\uc740 \uc758\ub8cc, \uc0ac\ud68c\uacfc\ud559, \ub9c8\ucf00\ud305 \ub4f1 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \ub110\ub9ac \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ub294 \ub85c\uc9c0\uc2a4\ud2f1 \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc608\uce21 \uac12\uc744 \ud655\ub960\ub85c \ubcc0\ud658\ud569\ub2c8\ub2e4.<br><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\uc8fc\uc694 \ud2b9\uc9d5:<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ubaa8\ub378 \ud615\ud0dc<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc885\uc18d \ubcc0\uc218\ub294 \uc774\uc9c4 \ub610\ub294 \ub2e4\ubc94\uc8fc\ud615\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\ub85c\uc9c0\uc2a4\ud2f1 \ud568\uc218(\uc2dc\uadf8\ubaa8\uc774\ub4dc \ud568\uc218)\ub97c \uc0ac\uc6a9\ud558\uc5ec \uacb0\uacfc \uac12\uc744 0\uacfc 1 \uc0ac\uc774\uc758 \ud655\ub960\ub85c \ubcc0\ud658\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\uc218\ud559\uc801 \ud45c\ud604<\/strong>:<br>\\[<br>\\text{logit}(P) = \\ln\\left(\\frac{P}{1-P}\\right) = \\beta_0 + \\beta_1X_1 + \\beta_2X_2 + \\ldots + \\beta_kX_k<br>\\]<br>\uc5ec\uae30\uc11c (P)\ub294 \uc885\uc18d \ubcc0\uc218\uac00 1\uc77c \ud655\ub960\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\uc608\uce21 \uac12<\/strong>:<br>\\[<br>P(Y=1|X) = \\frac{1}{1 + e^{-(\\beta_0 + \\beta_1X_1 + \\beta_2X_2 + \\ldots + \\beta_kX_k)}}<br>\\]<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EB%A1%9C%EC%A7%93_%EB%AA%A8%EB%8D%B8Logit_Model\"><\/span>\ub85c\uc9d3 \ubaa8\ub378(Logit Model)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\ub85c\uc9d3 \ubaa8\ub378\uc740 \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc640 \uac19\uc740 \uc6d0\ub9ac\ub97c \uc0ac\uc6a9\ud558\uc9c0\ub9cc, \uc8fc\ub85c \uacbd\uc81c\ud559\uacfc \uacc4\ub7c9\uacbd\uc81c\ud559\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 \uc6a9\uc5b4\uc785\ub2c8\ub2e4. \ub85c\uc9d3 \ubaa8\ub378\uc740 \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc758 \uc218\ud559\uc801 \uae30\ucd08\ub97c \uae30\ubc18\uc73c\ub85c \uc774\uc0b0 \uc120\ud0dd \ubaa8\ub378(discrete choice model)\uc744 \ubd84\uc11d\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc8fc\ub85c \uc18c\ube44\uc790\uc758 \uc120\ud0dd \ud589\ub3d9, \uc2dc\uc7a5 \uc810\uc720\uc728 \ubd84\uc11d, \uad50\ud1b5 \ubaa8\ud615 \ub4f1\uc5d0\uc11c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\uc8fc\uc694 \ud2b9\uc9d5:<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\uc6a9\uc5b4\uc758 \uae30\uc6d0<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uacbd\uc81c\ud559\uacfc \uacc4\ub7c9\uacbd\uc81c\ud559\uc5d0\uc11c \uc8fc\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc640 \ub3d9\uc77c\ud55c \uc218\ud559\uc801 \ubaa8\ub378\uc744 \uc0ac\uc6a9\ud558\uc9c0\ub9cc, \uc8fc\ub85c \uc774\uc0b0 \uc120\ud0dd \ud589\ub3d9\uc744 \uc124\uba85\ud558\ub294 \ub370 \uc911\uc810\uc744 \ub461\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\uc218\ud559\uc801 \ud45c\ud604<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc640 \ub3d9\uc77c\ud55c \uc218\ud559\uc801 \ud45c\ud604\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EC%A3%BC%EC%9A%94_%EC%B0%A8%EC%9D%B4%EC%A0%90\"><\/span>\uc8fc\uc694 \ucc28\uc774\uc810<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\uc6a9\uc5b4\uc758 \uc0ac\uc6a9<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0<\/strong>: \uc8fc\ub85c \ud1b5\uacc4\ud559, \uc0dd\ubb3c\ud559, \uc0ac\ud68c\uacfc\ud559, \ub9c8\ucf00\ud305 \ub4f1\uc5d0\uc11c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\ub85c\uc9d3 \ubaa8\ub378<\/strong>: \uc8fc\ub85c \uacbd\uc81c\ud559\uacfc \uacc4\ub7c9\uacbd\uc81c\ud559\uc5d0\uc11c \uc774\uc0b0 \uc120\ud0dd \ud589\ub3d9\uc744 \ubd84\uc11d\ud560 \ub54c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\uc751\uc6a9 \ubd84\uc57c<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0<\/strong>: \uc9c8\ubcd1 \uc608\uce21, \uace0\uac1d \uc774\ud0c8 \uc608\uce21, \ub9c8\ucf00\ud305 \ucea0\ud398\uc778 \ud6a8\uacfc \ubd84\uc11d \ub4f1.<\/li>\n\n\n\n<li><strong>\ub85c\uc9d3 \ubaa8\ub378<\/strong>: \uc18c\ube44\uc790 \uc120\ud0dd \ubd84\uc11d, \uad50\ud1b5 \uc218\uc694 \ubd84\uc11d, \uc81c\ud488 \uc120\ud638\ub3c4 \ubd84\uc11d \ub4f1.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ub9e5\ub77d<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0<\/strong>: \uc77c\ubc18\uc801\uc73c\ub85c \uc608\uce21\uacfc \ubd84\ub958 \ubb38\uc81c\uc5d0 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\ub85c\uc9d3 \ubaa8\ub378<\/strong>: \uc8fc\ub85c \uac1c\ubcc4 \uc120\ud0dd\uc758 \uacbd\uc81c\uc801 \uacb0\uc815\uc5d0 \ucd08\uc810\uc744 \ub9de\ucda5\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%EC%9A%94%EC%95%BD-2\"><\/span>\uc694\uc57d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\uc640 \ub85c\uc9d3 \ubaa8\ub378\uc740 \ub3d9\uc77c\ud55c \uc218\ud559\uc801 \uc6d0\ub9ac\ub97c \uacf5\uc720\ud558\uc9c0\ub9cc, \uc0ac\uc6a9\ub418\ub294 \ub9e5\ub77d\uacfc \uc6a9\uc5b4\uc758 \uae30\uc6d0\uc5d0 \ub530\ub77c \ucc28\uc774\uac00 \uc788\uc2b5\ub2c8\ub2e4. \ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ub294 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \uc774\uc9c4 \uc885\uc18d \ubcc0\uc218\uc758 \uc608\uce21\uc5d0 \ub110\ub9ac \uc0ac\uc6a9\ub418\ub294 \ubc18\uba74, \ub85c\uc9d3 \ubaa8\ub378\uc740 \uc8fc\ub85c \uacbd\uc81c\ud559\uc5d0\uc11c \uc774\uc0b0 \uc120\ud0dd \ud589\ub3d9\uc744 \ubd84\uc11d\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ub450 \ubaa8\ub378 \ubaa8\ub450 \ub85c\uc9c0\uc2a4\ud2f1 \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub3c5\ub9bd \ubcc0\uc218\uc640 \uc885\uc18d \ubcc0\uc218 \uac04\uc758 \uad00\uacc4\ub97c \ubaa8\ub378\ub9c1\ud569\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ub85c\uc9c0\uc2a4\ud2f1 \ud68c\uadc0\ubd84\uc11d(Logistic Regression Analysis)\uc740 \uc885\uc18d \ubcc0\uc218\uac00 \uc774\uc9c4(binary) \ub610\ub294 \ub2e4\ubc94\uc8fc(multi-category)\uc778 \uacbd\uc6b0\uc5d0 \uc0ac\uc6a9\ub418\ub294 \ud1b5\uacc4\uc801 \ubd84\uc11d \uae30\ubc95\uc785\ub2c8\ub2e4. \uc8fc\ub85c \uc0ac\uac74\uc758 \ubc1c\uc0dd \uc5ec\ubd80\ub97c&#8230;<\/p>\n","protected":false},"author":1,"featured_media":1218,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-740","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-stat","wpcat-6-id"],"_links":{"self":[{"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/740","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=740"}],"version-history":[{"count":5,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/740\/revisions"}],"predecessor-version":[{"id":1224,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/740\/revisions\/1224"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/media\/1218"}],"wp:attachment":[{"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=740"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=740"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}