{"id":1223,"date":"2023-07-27T05:41:59","date_gmt":"2023-07-27T05:41:59","guid":{"rendered":"https:\/\/statorials.org\/ko\/r%e1%84%8b%e1%85%b4-%e1%84%86%e1%85%ae%e1%84%8c%e1%85%a1%e1%86%a8%e1%84%8b%e1%85%b1-%e1%84%83%e1%85%b3%e1%84%85%e1%85%b5%e1%86%af\/"},"modified":"2023-07-27T05:41:59","modified_gmt":"2023-07-27T05:41:59","slug":"r%e1%84%8b%e1%85%b4-%e1%84%86%e1%85%ae%e1%84%8c%e1%85%a1%e1%86%a8%e1%84%8b%e1%85%b1-%e1%84%83%e1%85%b3%e1%84%85%e1%85%b5%e1%86%af","status":"publish","type":"post","link":"https:\/\/statorials.org\/ko\/r%e1%84%8b%e1%85%b4-%e1%84%86%e1%85%ae%e1%84%8c%e1%85%a1%e1%86%a8%e1%84%8b%e1%85%b1-%e1%84%83%e1%85%b3%e1%84%85%e1%85%b5%e1%86%af\/","title":{"rendered":"R\uc5d0\uc11c \ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8\ub97c \uc0dd\uc131\ud558\ub294 \ubc29\ubc95(\ub2e8\uacc4\ubcc4)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\uc77c\ub828\uc758 \uc608\uce21 \ubcc0\uc218\uc640 <a href=\"https:\/\/statorials.org\/ko\/\u1107\u1167\u11ab\u1109\u116e-\u1109\u1165\u11af\u1106\u1167\u11bc-\u110b\u1173\u11bc\u1103\u1161\u11b8\/\" target=\"_blank\" rel=\"noopener noreferrer\">\ubc18\uc751 \ubcc0\uc218<\/a> \uc0ac\uc774\uc758 \uad00\uacc4\uac00 \ub9e4\uc6b0 \ubcf5\uc7a1\ud55c \uacbd\uc6b0, \uc6b0\ub9ac\ub294 \uc885\uc885 \ube44\uc120\ud615 \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc774\ub4e4 \uc0ac\uc774\uc758 \uad00\uacc4\ub97c \ubaa8\ub378\ub9c1\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uadf8\ub7ec\ud55c \ubc29\ubc95 \uc911 \ud558\ub098\ub294 <a href=\"https:\/\/statorials.org\/ko\/\u1107\u116e\u11ab\u1105\u1172-\u1106\u1175\u11be-\u1112\u116c\u1100\u1171-\u1110\u1173\u1105\u1175\/\" target=\"_blank\" rel=\"noopener noreferrer\">\uc758\uc0ac\uacb0\uc815 \ud2b8\ub9ac\ub97c<\/a> \uad6c\ucd95\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ub2e8\uc77c \uc758\uc0ac\uacb0\uc815 \ud2b8\ub9ac\ub97c \uc0ac\uc6a9\ud560 \ub54c\uc758 \ub2e8\uc810\uc740 <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\">\ub192\uc740 \ubd84\uc0b0<\/a> \uc73c\ub85c \uc778\ud574 \uc5b4\ub824\uc6c0\uc744 \uacaa\ub294 \uacbd\ud5a5\uc774 \uc788\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc989, \ub370\uc774\ud130\uc138\ud2b8\ub97c \ub450 \ubd80\ubd84\uc73c\ub85c \ub098\ub204\uace0 \uc758\uc0ac\uacb0\uc815 \ud2b8\ub9ac\ub97c \ub450 \ubd80\ubd84 \ubaa8\ub450\uc5d0 \uc801\uc6a9\ud558\uba74 \uacb0\uacfc\uac00 \ub9e4\uc6b0 \ub2e4\ub97c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ub2e8\uc77c \uc758\uc0ac\uacb0\uc815 \ud2b8\ub9ac\uc758 \ubd84\uc0b0\uc744 \uc904\uc774\uae30 \uc704\ud574 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \ud55c \uac00\uc9c0 \ubc29\ubc95\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \uc791\ub3d9\ud558\ub294 <a href=\"https:\/\/statorials.org\/ko\/\u1106\u116e\u110c\u1161\u11a8\u110b\u1171-\u1112\u116e\u11ab\u1105\u1167\u11ab\/\" target=\"_blank\" rel=\"noopener noreferrer\">\ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8 \ubaa8\ub378\uc744<\/a> \uad6c\ucd95\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>1.<\/strong> \uc6d0\ubcf8 \ub370\uc774\ud130 \uc138\ud2b8\uc5d0\uc11c <em>b<\/em> \ubd80\ud2b8\uc2a4\ud2b8\ub7a9 \uc0d8\ud50c\uc744 \uac00\uc838\uc635\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>2.<\/strong> \uac01 \ubd80\ud2b8\uc2a4\ud2b8\ub7a9 \uc0d8\ud50c\uc5d0 \ub300\ud55c \uc758\uc0ac\uacb0\uc815 \ud2b8\ub9ac\ub97c \ub9cc\ub4ed\ub2c8\ub2e4.<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">\ud2b8\ub9ac\ub97c \uad6c\uc131\ud560 \ub54c \ubd84\ud560\uc774 \uace0\ub824\ub420 \ub54c\ub9c8\ub2e4 <em>m<\/em> \uc608\uce21 \ubcc0\uc218\uc758 \ubb34\uc791\uc704 \uc0d8\ud50c\ub9cc <em>p<\/em> \uc608\uce21 \ubcc0\uc218\uc758 \uc804\uccb4 \uc9d1\ud569\uc5d0\uc11c \ubd84\ud560\ud560 \ud6c4\ubcf4\ub85c \uac04\uc8fc\ub429\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \uc6b0\ub9ac\ub294 <span style=\"text-decoration: overline;\"><em>\u221ap<\/em><\/span> \uc640 \ub3d9\uc77c\ud55c <em>m\uc744<\/em> \uc120\ud0dd\ud569\ub2c8\ub2e4.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\"><strong>3.<\/strong> \uac01 \ud2b8\ub9ac\uc758 \uc608\uce21\uc744 \ud3c9\uade0\ud558\uc5ec \ucd5c\uc885 \ubaa8\ub378\uc744 \uc5bb\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8\ub294 \ub2e8\uc77c \uc758\uc0ac\uacb0\uc815 \ud2b8\ub9ac\ub098 <a href=\"https:\/\/statorials.org\/ko\/r\u110b\u1166-\u1103\u1161\u11b7\u1100\u1175\/\" target=\"_blank\" rel=\"noopener noreferrer\">\ubc30\uae45 \ubaa8\ub378<\/a> \ubcf4\ub2e4 \ud6e8\uc52c \ub354 \uc815\ud655\ud55c \ubaa8\ub378\uc744 \uc0dd\uc131\ud558\ub294 \uacbd\ud5a5\uc774 \uc788\ub294 \uac83\uc73c\ub85c \ub098\ud0c0\ub0ac\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc774 \ud29c\ud1a0\ub9ac\uc5bc\uc5d0\uc11c\ub294 R\uc5d0\uc11c \ub370\uc774\ud130 \uc138\ud2b8\uc5d0 \ub300\ud55c Random Forest \ubaa8\ub378\uc744 \uc0dd\uc131\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud55c \ub2e8\uacc4\ubcc4 \uc608\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>1\ub2e8\uacc4: \ud544\uc694\ud55c \ud328\ud0a4\uc9c0 \ub85c\ub4dc<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">\uba3c\uc800 \uc774 \uc608\uc81c\uc5d0 \ud544\uc694\ud55c \ud328\ud0a4\uc9c0\ub97c \ub85c\ub4dc\ud558\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \uac04\ub2e8\ud55c \uc608\uc5d0\uc11c\ub294 \ud558\ub098\uc758 \ud328\ud0a4\uc9c0\ub9cc \ud544\uc694\ud569\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #993300;\">library<\/span> (randomForest)\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>2\ub2e8\uacc4: \ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8 \ubaa8\ub378 \uc870\uc815<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">\uc774 \uc608\uc5d0\uc11c\ub294 \uac1c\ubcc4\uc801\uc73c\ub85c 153\uc77c \ub3d9\uc548 \ub274\uc695\uc2dc\uc758 \ub300\uae30 \uc9c8 \uce21\uc815\uac12\uc744 \ud3ec\ud568\ud558\ub294 <strong>Air Quality<\/strong> \ub77c\ub294 \uae30\ubcf8 \uc81c\uacf5 R \ub370\uc774\ud130 \uc138\ud2b8\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#view structure of air quality dataset<\/span>\nstr(airquality)\n\n'data.frame': 153 obs. of 6 variables:\n $ Ozone: int 41 36 12 18 NA 28 23 19 8 NA ...\n $Solar.R: int 190 118 149 313 NA NA 299 99 19 194 ...\n $ Wind: num 7.4 8 12.6 11.5 14.3 14.9 8.6 13.8 20.1 8.6 ...\n $ Temp: int 67 72 74 62 56 66 65 59 61 69 ...\n $Month: int 5 5 5 5 5 5 5 5 5 5 ...\n $Day: int 1 2 3 4 5 6 7 8 9 10 ...\n\n<span style=\"color: #008080;\">#find number of rows with missing values\n<\/span>sum(! <span style=\"color: #3366ff;\">complete<\/span> . <span style=\"color: #3366ff;\">cases<\/span> (airquality))\n\n[1] 42\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\uc774 \ub370\uc774\ud130 \uc138\ud2b8\uc5d0\ub294 \ub204\ub77d\ub41c \uac12\uc774 \uc788\ub294 42\uac1c\uc758 \ud589\uc774 \uc788\uc2b5\ub2c8\ub2e4. \ub530\ub77c\uc11c \ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8 \ubaa8\ub378\uc744 \ud53c\ud305\ud558\uae30 \uc804\uc5d0 \uac01 \uc5f4\uc758 \ub204\ub77d\ub41c \uac12\uc744 \uc5f4 \uc911\uc559\uac12\uc73c\ub85c \ucc44\uc6b8 \uac83\uc785\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#replace NAs with column medians\n<\/span><span style=\"color: #008000;\">for<\/span> (i <span style=\"color: #008000;\">in<\/span> 1: <span style=\"color: #3366ff;\">ncol<\/span> (air quality)) {\n  airquality[,i][ <span style=\"color: #3366ff;\">is<\/span> . <span style=\"color: #3366ff;\">na<\/span> (airquality[, i])] &lt;- <span style=\"color: #3366ff;\">median<\/span> (airquality[, i], <span style=\"color: #3366ff;\">na<\/span> . <span style=\"color: #3366ff;\">rm<\/span> = <span style=\"color: #008000;\">TRUE<\/span> )\n}\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>\uad00\ub828 \ud56d\ubaa9:<\/strong><\/span> <a href=\"https:\/\/statorials.org\/ko\/r\u110b\u1166-\u1100\u1167\u11af\u110e\u1173\u11a8\u1100\u1161\u11b9-\u1103\u1162\u110e\u1175\/\" target=\"_blank\" rel=\"noopener noreferrer\">R\uc5d0\uc11c \ub204\ub77d\ub41c \uac12\uc744 \ub300\uce58\ud558\ub294 \ubc29\ubc95<\/a><\/p>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ucf54\ub4dc\ub294 <a href=\"https:\/\/cran.r-project.org\/web\/packages\/randomForest\/randomForest.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">RandomForest<\/a> \ud328\ud0a4\uc9c0\uc758 <strong>RandomForest()<\/strong> \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec R\uc5d0\uc11c Random Forest \ubaa8\ub378\uc744 \ub9de\ucd94\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#make this example reproducible\n<\/span>set.seed(1)\n\n<span style=\"color: #008080;\">#fit the random forest model\n<\/span>model &lt;- randomForest(\n  formula = Ozone ~ .,\n  data = airquality\n)\n\n<span style=\"color: #008080;\">#display fitted model\n<\/span>model\n\nCall:\n randomForest(formula = Ozone ~ ., data = airquality) \n               Type of random forest: regression\n                     Number of trees: 500\nNo. of variables tried at each split: 1\n\n          Mean of squared residuals: 327.0914\n                    % Var explained: 61\n\n<span style=\"color: #008080;\">#find number of trees that produce lowest test MSE\n<\/span>which.min(model$mse)\n\n[1] 82\n\n<span style=\"color: #008080;\">#find RMSE of best model\n<\/span>sqrt(model$mse[ <span style=\"color: #3366ff;\">which<\/span> . <span style=\"color: #3366ff;\">min<\/span> (model$mse)]) \n\n[1] 17.64392\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\uacb0\uacfc\uc5d0\uc11c \uac00\uc7a5 \ub0ae\uc740 \ud14c\uc2a4\ud2b8 \ud3c9\uade0 \uc81c\uacf1 \uc624\ucc28(MSE)\ub97c \uc0dd\uc131\ud55c \ubaa8\ub378\uc774 <strong>82\uac1c\uc758<\/strong> \ud2b8\ub9ac\ub97c \uc0ac\uc6a9\ud588\uc74c\uc744 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ub610\ud55c \uc774 \ubaa8\ub378\uc758 \uc81c\uacf1 \ud3c9\uade0 \uc81c\uacf1\uadfc \uc624\ucc28\uac00 <strong>17.64392<\/strong> \uc784\uc744 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span> <span style=\"color: #000000;\">\uc774\uac83\uc744 \uc624\uc874 \uc608\uce21\uac12\uacfc \uc2e4\uc81c \uad00\uce21\uac12\uc758 \ud3c9\uade0 \ucc28\uc774\ub77c\uace0 \uc0dd\uac01\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">\ub2e4\uc74c \ucf54\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc0ac\uc6a9\ub41c \ud2b8\ub9ac \uc218\ub97c \uae30\ubc18\uc73c\ub85c MSE \ud14c\uc2a4\ud2b8 \ud50c\ub86f\uc744 \uc0dd\uc131\ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#plot the MSE test by number of trees\n<\/span>plot(model)\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-12143 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/aleatoireforetr1.png\" alt=\"R\uc758 \ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8\uc5d0 \uc788\ub294 \ub098\ubb34 \uc218\ub85c MSE\ub97c \ud14c\uc2a4\ud2b8\ud569\ub2c8\ub2e4.\" width=\"449\" height=\"439\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">\uadf8\ub9ac\uace0 <strong>varImpPlot()<\/strong> \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \ucd5c\uc885 \ubaa8\ub378\uc5d0\uc11c \uac01 \uc608\uce21 \ubcc0\uc218\uc758 \uc911\uc694\uc131\uc744 \ud45c\uc2dc\ud558\ub294 \ud50c\ub86f\uc744 \ub9cc\ub4e4 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#produce variable importance plot<\/span>\nvarImpPlot(model) \n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-12144 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/aleatoireforetr2.png\" alt=\"R\uc758 \ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8\" width=\"424\" height=\"442\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">x\ucd95\uc740 y\ucd95\uc5d0 \ud45c\uc2dc\ub41c \ub2e4\uc591\ud55c \uc608\uce21 \ubcc0\uc218\uc5d0 \ub300\ud55c \ubd84\ud560 \ud568\uc218\ub85c \ud68c\uadc0 \ud2b8\ub9ac \ub178\ub4dc \uc21c\ub3c4\uc758 \ud3c9\uade0 \uc99d\uac00\ub97c \ud45c\uc2dc\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uadf8\ub798\ud504\ub97c \ubcf4\uba74 <em>\ubc14\ub78c\uc774<\/em> \uac00\uc7a5 \uc911\uc694\ud55c \uc608\uce21 \ubcc0\uc218\uc774\uace0 \uadf8 \ub2e4\uc74c\uc774 <em>\uc628\ub3c4<\/em> \ub77c\ub294 \uac83\uc744 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>3\ub2e8\uacc4: \ubaa8\ub378 \uc870\uc815<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">\uae30\ubcf8\uc801\uc73c\ub85c <strong>RandomForest()<\/strong> \ud568\uc218\ub294 500\uac1c\uc758 \ud2b8\ub9ac\uc640 (\ucd1d \uc608\uce21 \ubcc0\uc218\/3) \ubb34\uc791\uc704\ub85c \uc120\ud0dd\ub41c \uc608\uce21 \ubcc0\uc218\ub97c \uac01 \ubd84\ud560\uc758 \uc7a0\uc7ac\uc801 \ud6c4\ubcf4\ub85c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. <strong>tuneRF()<\/strong> \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc774\ub7ec\ud55c \ub9e4\uac1c\ubcc0\uc218\ub97c \uc870\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ucf54\ub4dc\ub294 \ub2e4\uc74c \uc0ac\uc591\uc744 \uc0ac\uc6a9\ud558\uc5ec \ucd5c\uc801\uc758 \ubaa8\ub378\uc744 \ucc3e\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>ntreeTry:<\/strong> \uad6c\ucd95\ud560 \ud2b8\ub9ac \uc218\uc785\ub2c8\ub2e4.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>mtryStart:<\/strong> \uac01 \ubd84\ud560\uc5d0\uc11c \uace0\ub824\ud560 \uc608\uce21 \ubcc0\uc218\uc758 \ucd08\uae30 \uc218\uc785\ub2c8\ub2e4.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>stepFactor:<\/strong> \uc608\uc0c1\ub418\ub294 Out-of-bag \uc624\ub958\uac00 \ud2b9\uc815 \uc591\ub9cc\ud07c \uac1c\uc120\ub418\uc9c0 \uc54a\uc744 \ub54c\uae4c\uc9c0 \uc99d\uac00\ud558\ub294 \uc694\uc18c\uc785\ub2c8\ub2e4.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>\uac1c\uc120:<\/strong> \ub2e8\uacc4 \uacc4\uc218\ub97c \uacc4\uc18d \uc99d\uac00\uc2dc\ud0a4\uae30 \uc704\ud574 \ubc31 \uc885\ub8cc \uc624\ub958\ub97c \uac1c\uc120\ud574\uc57c \ud558\ub294 \uc591\uc785\ub2c8\ub2e4.<\/span><\/li>\n<\/ul>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>model_tuned &lt;- tuneRF(\n               x=airquality[,-1], <span style=\"color: #008080;\">#define predictor variables<\/span>\n               y=airquality$Ozone, <span style=\"color: #008080;\">#define response variable<\/span>\n               ntreeTry= <span style=\"color: #008000;\">500<\/span> ,\n               mtryStart= <span style=\"color: #008000;\">4<\/span> , \n               stepFactor= <span style=\"color: #008000;\">1.5<\/span> ,\n               improve= <span style=\"color: #008000;\">0.01<\/span> ,\n               trace= <span style=\"color: #008000;\">FALSE<\/span> <span style=\"color: #008080;\">#don't show real-time progress<\/span>\n               )\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\uc774 \ud568\uc218\ub294 x\ucd95\uc5d0 \ud2b8\ub9ac\ub97c \uad6c\uc131\ud560 \ub54c \uac01 \ubd84\ud560\uc5d0 \uc0ac\uc6a9\ub41c \uc608\uce21 \ubcc0\uc218\uc758 \uc218\ub97c \ud45c\uc2dc\ud558\uace0 y\ucd95\uc5d0 \uc608\uc0c1 Out-of-bag \uc624\ub958\ub97c \ud45c\uc2dc\ud558\ub294 \ub2e4\uc74c \ud50c\ub86f\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-12145 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/aleatoireforetr3.png\" alt=\"R\uc758 \ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8 \ubaa8\ub378\uc758 OOB \uc624\ub958\" width=\"433\" height=\"378\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">\ud2b8\ub9ac\ub97c \uc791\uc131\ud560 \ub54c \uac01 \ubd84\ud560\uc5d0\uc11c \ubb34\uc791\uc704\ub85c \uc120\ud0dd\ub41c <strong>2\uac1c\uc758<\/strong> \uc608\uce21 \ubcc0\uc218\ub97c \uc0ac\uc6a9\ud558\uba74 \uac00\uc7a5 \ub0ae\uc740 OOB \uc624\ub958\uac00 \uc5bb\uc5b4\uc9c0\ub294 \uac83\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc774\ub294 \uc2e4\uc81c\ub85c \ucd08\uae30 <strong>RandomForest()<\/strong> \ud568\uc218\uc5d0\uc11c \uc0ac\uc6a9\ub41c \uae30\ubcf8 \uc124\uc815(\ucd1d \uc608\uce21\uc790\/3 = 6\/3 = 2)\uc5d0 \ud574\ub2f9\ud569\ub2c8\ub2e4.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>4\ub2e8\uacc4: \ucd5c\uc885 \ubaa8\ub378\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc608\uce21<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">\ub9c8\uc9c0\ub9c9\uc73c\ub85c, \uc870\uc815\ub41c \ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8 \ubaa8\ub378\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc0c8\ub85c\uc6b4 \uad00\uce21\uac12\uc5d0 \ub300\ud55c \uc608\uce21\uc744 \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#define new observation\n<\/span>new &lt;- data.frame(Solar.R=150, Wind=8, Temp=70, Month=5, Day=5)\n\n<span style=\"color: #008080;\">#use fitted bagged model to predict Ozone value of new observation\n<\/span>predict(model, newdata=new)\n\n27.19442\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\uc608\uce21 \ubcc0\uc218\uc758 \uac12\uc744 \uae30\ubc18\uc73c\ub85c \ud53c\ud305\ub41c \ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8 \ubaa8\ub378\uc740 \ud2b9\uc815 \ub0a0\uc9dc\uc758 \uc624\uc874 \uac12\uc774 <b>27.19442<\/b> \uac00 \ub420 \uac83\uc774\ub77c\uace0 \uc608\uce21\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc774 \uc608\uc81c\uc5d0 \uc0ac\uc6a9\ub41c \uc804\uccb4 R \ucf54\ub4dc\ub294 <a href=\"https:\/\/github.com\/Statorials\/R-Guides\/blob\/main\/random_forest.R\" target=\"_blank\" rel=\"noopener noreferrer\">\uc5ec\uae30\uc5d0\uc11c<\/a> \ucc3e\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uc77c\ub828\uc758 \uc608\uce21 \ubcc0\uc218\uc640 \ubc18\uc751 \ubcc0\uc218 \uc0ac\uc774\uc758 \uad00\uacc4\uac00 \ub9e4\uc6b0 \ubcf5\uc7a1\ud55c \uacbd\uc6b0, \uc6b0\ub9ac\ub294 \uc885\uc885 \ube44\uc120\ud615 \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc774\ub4e4 \uc0ac\uc774\uc758 \uad00\uacc4\ub97c \ubaa8\ub378\ub9c1\ud569\ub2c8\ub2e4. \uadf8\ub7ec\ud55c \ubc29\ubc95 \uc911 \ud558\ub098\ub294 \uc758\uc0ac\uacb0\uc815 \ud2b8\ub9ac\ub97c \uad6c\ucd95\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ub2e8\uc77c \uc758\uc0ac\uacb0\uc815 \ud2b8\ub9ac\ub97c \uc0ac\uc6a9\ud560 \ub54c\uc758 \ub2e8\uc810\uc740 \ub192\uc740 \ubd84\uc0b0 \uc73c\ub85c \uc778\ud574 \uc5b4\ub824\uc6c0\uc744 \uacaa\ub294 \uacbd\ud5a5\uc774 \uc788\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4. \uc989, \ub370\uc774\ud130\uc138\ud2b8\ub97c \ub450 \ubd80\ubd84\uc73c\ub85c \ub098\ub204\uace0 \uc758\uc0ac\uacb0\uc815 \ud2b8\ub9ac\ub97c \ub450 \ubd80\ubd84 \ubaa8\ub450\uc5d0 \uc801\uc6a9\ud558\uba74 \uacb0\uacfc\uac00 [&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-1223","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>R\uc5d0\uc11c \ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8\ub97c \uc0dd\uc131\ud558\ub294 \ubc29\ubc95(\ub2e8\uacc4\ubcc4)<\/title>\n<meta name=\"description\" content=\"\uc774 \ud29c\ud1a0\ub9ac\uc5bc\uc5d0\uc11c\ub294 \ub2e8\uacc4\ubcc4 \uc608\uc81c\ub97c \ud1b5\ud574 R\uc5d0\uc11c \ub79c\ub364 \ud3ec\ub808\uc2a4\ud2b8 \ubaa8\ub378\uc744 \uc0dd\uc131\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud569\ub2c8\ub2e4.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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