{"id":1223,"date":"2023-07-27T05:41:59","date_gmt":"2023-07-27T05:41:59","guid":{"rendered":"https:\/\/statorials.org\/ar\/%d8%a7%d9%84%d8%ad%d9%81%d8%b1-%d8%a7%d9%84%d8%b9%d8%b4%d9%88%d8%a7%d9%8a%d9%94%d9%8a-%d9%81%d9%8a-%d8%b5\/"},"modified":"2023-07-27T05:41:59","modified_gmt":"2023-07-27T05:41:59","slug":"%d8%a7%d9%84%d8%ad%d9%81%d8%b1-%d8%a7%d9%84%d8%b9%d8%b4%d9%88%d8%a7%d9%8a%d9%94%d9%8a-%d9%81%d9%8a-%d8%b5","status":"publish","type":"post","link":"https:\/\/statorials.org\/ar\/%d8%a7%d9%84%d8%ad%d9%81%d8%b1-%d8%a7%d9%84%d8%b9%d8%b4%d9%88%d8%a7%d9%8a%d9%94%d9%8a-%d9%81%d9%8a-%d8%b5\/","title":{"rendered":"\u0643\u064a\u0641\u064a\u0629 \u0625\u0646\u0634\u0627\u0621 \u063a\u0627\u0628\u0627\u062a \u0639\u0634\u0648\u0627\u0626\u064a\u0629 \u0641\u064a r (\u062e\u0637\u0648\u0629 \u0628\u062e\u0637\u0648\u0629)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p style=\";text-align:right;direction:rtl\"><span style=\"color: #000000;\">\u0639\u0646\u062f\u0645\u0627 \u062a\u0643\u0648\u0646 \u0627\u0644\u0639\u0644\u0627\u0642\u0629 \u0628\u064a\u0646 \u0645\u062c\u0645\u0648\u0639\u0629 \u0645\u0646 \u0627\u0644\u0645\u062a\u063a\u064a\u0631\u0627\u062a \u0627\u0644\u0645\u062a\u0648\u0642\u0639\u0629 <a href=\"https:\/\/statorials.org\/ar\/\u0627\u0644\u0645\u062a\u063a\u064a\u0631\u0627\u062a-\u0627\u0644\u0627\u0633\u062a\u062c\u0627\u0628\u0627\u062a-\u0627\u0644\u062a\u0641\u0633\u064a\u0631\u064a\u0629\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0648\u0645\u062a\u063a\u064a\u0631 \u0627\u0644\u0627\u0633\u062a\u062c\u0627\u0628\u0629<\/a> \u0645\u0639\u0642\u062f\u0629 \u0644\u0644\u063a\u0627\u064a\u0629\u060c \u0641\u0625\u0646\u0646\u0627 \u063a\u0627\u0644\u0628\u064b\u0627 \u0645\u0627 \u0646\u0633\u062a\u062e\u062f\u0645 \u0623\u0633\u0627\u0644\u064a\u0628 \u063a\u064a\u0631 \u062e\u0637\u064a\u0629 \u0644\u0646\u0645\u0630\u062c\u0629 \u0627\u0644\u0639\u0644\u0627\u0642\u0629 \u0628\u064a\u0646\u0647\u0645\u0627.<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0625\u062d\u062f\u0649 \u0647\u0630\u0647 \u0627\u0644\u0637\u0631\u0642 \u0647\u064a \u0628\u0646\u0627\u0621 <a href=\"https:\/\/statorials.org\/ar\/\u0627\u0654\u0634\u062c\u0627\u0631-\u0627\u0644\u062a\u0635\u0646\u064a\u0641-\u0648\u0627\u0644\u0627\u0646\u062d\u062f\u0627\u0631\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0634\u062c\u0631\u0629 \u0627\u0644\u0642\u0631\u0627\u0631<\/a> . \u0648\u0645\u0639 \u0630\u0644\u0643\u060c \u0641\u0625\u0646 \u0627\u0644\u062c\u0627\u0646\u0628 \u0627\u0644\u0633\u0644\u0628\u064a \u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0634\u062c\u0631\u0629 \u0642\u0631\u0627\u0631 \u0648\u0627\u062d\u062f\u0629 \u0647\u0648 \u0623\u0646\u0647\u0627 \u062a\u0645\u064a\u0644 \u0625\u0644\u0649 \u0627\u0644\u0645\u0639\u0627\u0646\u0627\u0629 \u0645\u0646 <a href=\"https:\/\/statorials.org\/ar\/\u062a\u0633\u0648\u064a\u0629-\u0627\u0644\u062a\u0628\u0627\u064a\u0646-\u0627\u0644\u062a\u062d\u064a\u0632\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0627\u0644\u062a\u0628\u0627\u064a\u0646 \u0627\u0644\u0639\u0627\u0644\u064a<\/a> .<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0623\u064a \u0623\u0646\u0646\u0627 \u0625\u0630\u0627 \u0642\u0633\u0645\u0646\u0627 \u0645\u062c\u0645\u0648\u0639\u0629 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0625\u0644\u0649 \u0646\u0635\u0641\u064a\u0646 \u0648\u0642\u0645\u0646\u0627 \u0628\u062a\u0637\u0628\u064a\u0642 \u0634\u062c\u0631\u0629 \u0627\u0644\u0642\u0631\u0627\u0631 \u0639\u0644\u0649 \u0643\u0644\u0627 \u0627\u0644\u0646\u0635\u0641\u064a\u0646\u060c \u0641\u0642\u062f \u062a\u0643\u0648\u0646 \u0627\u0644\u0646\u062a\u0627\u0626\u062c \u0645\u062e\u062a\u0644\u0641\u0629 \u062a\u0645\u0627\u0645\u064b\u0627.<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0625\u062d\u062f\u0649 \u0627\u0644\u0637\u0631\u0642 \u0627\u0644\u062a\u064a \u064a\u0645\u0643\u0646\u0646\u0627 \u0627\u0633\u062a\u062e\u062f\u0627\u0645\u0647\u0627 \u0644\u062a\u0642\u0644\u064a\u0644 \u0627\u0644\u062a\u0628\u0627\u064a\u0646 \u0641\u064a \u0634\u062c\u0631\u0629 \u0642\u0631\u0627\u0631 \u0648\u0627\u062d\u062f\u0629 \u0647\u064a \u0628\u0646\u0627\u0621 <a href=\"https:\/\/statorials.org\/ar\/\u062a\u062f\u0631\u064a\u0628\u0627\u062a-\u0639\u0634\u0648\u0627\u064a\u0654\u064a\u0629\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0646\u0645\u0648\u0630\u062c \u063a\u0627\u0628\u0629 \u0639\u0634\u0648\u0627\u0626\u064a<\/a> \u060c \u0648\u0627\u0644\u0630\u064a \u064a\u0639\u0645\u0644 \u0639\u0644\u0649 \u0627\u0644\u0646\u062d\u0648 \u0627\u0644\u062a\u0627\u0644\u064a:<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>1.<\/strong> \u062e\u0630 \u0639\u064a\u0646\u0627\u062a <em>\u062a\u0645\u0647\u064a\u062f\u064a\u0629<\/em> \u0645\u0646 \u0645\u062c\u0645\u0648\u0639\u0629 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u0623\u0635\u0644\u064a\u0629.<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>2.<\/strong> \u0642\u0645 \u0628\u0625\u0646\u0634\u0627\u0621 \u0634\u062c\u0631\u0629 \u0642\u0631\u0627\u0631\u0627\u062a \u0644\u0643\u0644 \u0639\u064a\u0646\u0629 \u062a\u0645\u0647\u064a\u062f\u064a\u0629.<\/span><\/p>\n<ul style=\";text-align:right;direction:rtl\">\n<li style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0639\u0646\u062f \u0625\u0646\u0634\u0627\u0621 \u0627\u0644\u0634\u062c\u0631\u0629\u060c \u0641\u064a \u0643\u0644 \u0645\u0631\u0629 \u064a\u062a\u0645 \u0641\u064a\u0647\u0627 \u0623\u062e\u0630 \u0627\u0644\u0627\u0646\u0642\u0633\u0627\u0645 \u0628\u0639\u064a\u0646 \u0627\u0644\u0627\u0639\u062a\u0628\u0627\u0631\u060c \u062a\u0639\u062a\u0628\u0631 \u0639\u064a\u0646\u0629 \u0639\u0634\u0648\u0627\u0626\u064a\u0629 \u0641\u0642\u0637 \u0645\u0646 \u0627\u0644\u0645\u062a\u0646\u0628\u0626\u064a\u0646 <em>m<\/em> \u0645\u0631\u0634\u062d\u064a\u0646 \u0644\u0644\u0627\u0646\u0642\u0633\u0627\u0645 \u0645\u0646 \u0627\u0644\u0645\u062c\u0645\u0648\u0639\u0629 \u0627\u0644\u0643\u0627\u0645\u0644\u0629 \u0644\u0644\u0645\u062a\u0646\u0628\u0626\u064a\u0646 <em>p<\/em> . \u0628\u0634\u0643\u0644 \u0639\u0627\u0645\u060c \u0646\u062e\u062a\u0627\u0631 <em>m<\/em> \u064a\u0633\u0627\u0648\u064a <span style=\"text-decoration: overline;\"><em>\u221ap<\/em><\/span> .<\/span><\/li>\n<\/ul>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>3.<\/strong> \u0645\u062a\u0648\u0633\u0637 \u0627\u0644\u062a\u0648\u0642\u0639\u0627\u062a \u0645\u0646 \u0643\u0644 \u0634\u062c\u0631\u0629 \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0627\u0644\u0646\u0645\u0648\u0630\u062c \u0627\u0644\u0646\u0647\u0627\u0626\u064a.<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0648\u0642\u062f \u062a\u0628\u064a\u0646 \u0623\u0646 \u0627\u0644\u063a\u0627\u0628\u0627\u062a \u0627\u0644\u0639\u0634\u0648\u0627\u0626\u064a\u0629 \u062a\u0645\u064a\u0644 \u0625\u0644\u0649 \u0625\u0646\u062a\u0627\u062c \u0646\u0645\u0627\u0630\u062c \u0623\u0643\u062b\u0631 \u062f\u0642\u0629 \u0645\u0646 \u0623\u0634\u062c\u0627\u0631 \u0627\u0644\u0642\u0631\u0627\u0631 \u0627\u0644\u0648\u0627\u062d\u062f \u0648\u062d\u062a\u0649 <a href=\"https:\/\/statorials.org\/ar\/\u0627\u0644\u062a\u0639\u0628\u064a\u0654\u0629-\u0641\u064a-\u0635\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0627\u0644\u0646\u0645\u0627\u0630\u062c \u0627\u0644\u0645\u0639\u0628\u0623\u0629<\/a> .<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u064a\u0648\u0641\u0631 \u0647\u0630\u0627 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c \u0627\u0644\u062a\u0639\u0644\u064a\u0645\u064a \u0645\u062b\u0627\u0644\u0627\u064b \u062e\u0637\u0648\u0629 \u0628\u062e\u0637\u0648\u0629 \u062d\u0648\u0644 \u0643\u064a\u0641\u064a\u0629 \u0625\u0646\u0634\u0627\u0621 \u0646\u0645\u0648\u0630\u062c \u063a\u0627\u0628\u0629 \u0639\u0634\u0648\u0627\u0626\u064a \u0644\u0645\u062c\u0645\u0648\u0639\u0629 \u0628\u064a\u0627\u0646\u0627\u062a \u0641\u064a R.<\/span><\/p>\n<h3 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>\u0627\u0644\u062e\u0637\u0648\u0629 1: \u062a\u062d\u0645\u064a\u0644 \u0627\u0644\u062d\u0632\u0645 \u0627\u0644\u0644\u0627\u0632\u0645\u0629<\/strong><\/span><\/h3>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0623\u0648\u0644\u0627\u064b\u060c \u0633\u0646\u0642\u0648\u0645 \u0628\u062a\u062d\u0645\u064a\u0644 \u0627\u0644\u062d\u0632\u0645 \u0627\u0644\u0644\u0627\u0632\u0645\u0629 \u0644\u0647\u0630\u0627 \u0627\u0644\u0645\u062b\u0627\u0644. \u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u0645\u062b\u0627\u0644 \u0627\u0644\u0628\u0633\u064a\u0637\u060c \u0646\u062d\u062a\u0627\u062c \u0625\u0644\u0649 \u062d\u0632\u0645\u0629 \u0648\u0627\u062d\u062f\u0629 \u0641\u0642\u0637:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #993300;\">library<\/span> (randomForest)\n<\/strong><\/pre>\n<h3 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>\u0627\u0644\u062e\u0637\u0648\u0629 2: \u0636\u0628\u0637 \u0646\u0645\u0648\u0630\u062c \u0627\u0644\u063a\u0627\u0628\u0629 \u0627\u0644\u0639\u0634\u0648\u0627\u0626\u064a\u0629<\/strong><\/span><\/h3>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u0645\u062b\u0627\u0644\u060c \u0633\u0648\u0641 \u0646\u0633\u062a\u062e\u062f\u0645 \u0645\u062c\u0645\u0648\u0639\u0629 \u0628\u064a\u0627\u0646\u0627\u062a R \u0645\u062f\u0645\u062c\u0629 \u062a\u0633\u0645\u0649 <strong>\u062c\u0648\u062f\u0629 \u0627\u0644\u0647\u0648\u0627\u0621<\/strong> \u0648\u0627\u0644\u062a\u064a \u062a\u062d\u062a\u0648\u064a \u0639\u0644\u0649 \u0642\u064a\u0627\u0633\u0627\u062a \u0644\u062c\u0648\u062f\u0629 \u0627\u0644\u0647\u0648\u0627\u0621 \u0641\u064a \u0645\u062f\u064a\u0646\u0629 \u0646\u064a\u0648\u064a\u0648\u0631\u0643 \u0639\u0644\u0649 \u0645\u062f\u0627\u0631 153 \u064a\u0648\u0645\u064b\u0627 \u0641\u0631\u062f\u064a\u064b\u0627.<\/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 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u062a\u062d\u062a\u0648\u064a \u0645\u062c\u0645\u0648\u0639\u0629 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0647\u0630\u0647 \u0639\u0644\u0649 42 \u0635\u0641\u064b\u0627 \u0628\u0642\u064a\u0645 \u0645\u0641\u0642\u0648\u062f\u0629. \u0644\u0630\u0644\u0643\u060c \u0642\u0628\u0644 \u062a\u0631\u0643\u064a\u0628 \u0646\u0645\u0648\u0630\u062c \u0627\u0644\u063a\u0627\u0628\u0629 \u0627\u0644\u0639\u0634\u0648\u0627\u0626\u064a\u060c \u0633\u0646\u0642\u0648\u0645 \u0628\u0645\u0644\u0621 \u0627\u0644\u0642\u064a\u0645 \u0627\u0644\u0645\u0641\u0642\u0648\u062f\u0629 \u0641\u064a \u0643\u0644 \u0639\u0645\u0648\u062f \u0628\u0645\u062a\u0648\u0633\u0637\u0627\u062a \u0627\u0644\u0639\u0645\u0648\u062f:<\/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 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>\u0630\u0627\u062a \u0635\u0644\u0629:<\/strong><\/span> <a href=\"https:\/\/statorials.org\/ar\/\u0627\u062d\u062a\u0633\u0627\u0628-\u0627\u0644\u0642\u064a\u0645-\u0627\u0644\u0645\u0641\u0642\u0648\u062f\u0629-\u0641\u064a-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0643\u064a\u0641\u064a\u0629 \u0627\u062d\u062a\u0633\u0627\u0628 \u0627\u0644\u0642\u064a\u0645 \u0627\u0644\u0645\u0641\u0642\u0648\u062f\u0629 \u0641\u064a R<\/a><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u064a\u0648\u0636\u062d \u0627\u0644\u062a\u0639\u0644\u064a\u0645\u0629 \u0627\u0644\u0628\u0631\u0645\u062c\u064a\u0629 \u0627\u0644\u062a\u0627\u0644\u064a\u0629 \u0643\u064a\u0641\u064a\u0629 \u0645\u0644\u0627\u0621\u0645\u0629 \u0646\u0645\u0648\u0630\u062c \u0627\u0644\u063a\u0627\u0628\u0629 \u0627\u0644\u0639\u0634\u0648\u0627\u0626\u064a \u0641\u064a R \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0648\u0638\u064a\u0641\u0629 <strong>RandomForest()<\/strong> \u0645\u0646 \u062d\u0632\u0645\u0629 <a href=\"https:\/\/cran.r-project.org\/web\/packages\/randomForest\/randomForest.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">RandomForest<\/a> .<\/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 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0645\u0646 \u0627\u0644\u0646\u062a\u064a\u062c\u0629 \u064a\u0645\u0643\u0646\u0646\u0627 \u0623\u0646 \u0646\u0631\u0649 \u0623\u0646 \u0627\u0644\u0646\u0645\u0648\u0630\u062c \u0627\u0644\u0630\u064a \u0623\u0646\u062a\u062c \u0623\u062f\u0646\u0649 \u0627\u062e\u062a\u0628\u0627\u0631 \u0644\u0645\u062a\u0648\u0633\u0637 \u0645\u0631\u0628\u0639 \u0627\u0644\u062e\u0637\u0623 (MSE) \u0627\u0633\u062a\u062e\u062f\u0645 <strong>82<\/strong> \u0634\u062c\u0631\u0629.<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u064a\u0645\u0643\u0646\u0646\u0627 \u0623\u064a\u0636\u064b\u0627 \u0623\u0646 \u0646\u0631\u0649 \u0623\u0646 \u062c\u0630\u0631 \u0645\u062a\u0648\u0633\u0637 \u0645\u0631\u0628\u0639 \u0627\u0644\u062e\u0637\u0623 \u0644\u0647\u0630\u0627 \u0627\u0644\u0646\u0645\u0648\u0630\u062c \u0643\u0627\u0646 <strong>17.64392<\/strong> .<\/span> <span style=\"color: #000000;\">\u064a\u0645\u0643\u0646\u0646\u0627 \u0623\u0646 \u0646\u0641\u0643\u0631 \u0641\u064a \u0647\u0630\u0627 \u0628\u0627\u0639\u062a\u0628\u0627\u0631\u0647 \u0645\u062a\u0648\u0633\u0637 \u0627\u0644\u0641\u0631\u0642 \u0628\u064a\u0646 \u0627\u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u0645\u062a\u0648\u0642\u0639\u0629 \u0644\u0644\u0623\u0648\u0632\u0648\u0646 \u0648\u0627\u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u0641\u0639\u0644\u064a\u0629 \u0627\u0644\u0645\u0631\u0635\u0648\u062f\u0629.<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><span style=\"color: #000000;\">\u064a\u0645\u0643\u0646\u0646\u0627 \u0623\u064a\u0636\u064b\u0627 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0643\u0648\u062f \u0627\u0644\u062a\u0627\u0644\u064a \u0644\u0625\u0646\u062a\u0627\u062c \u0642\u0637\u0639\u0629 \u0623\u0631\u0636 \u0644\u0627\u062e\u062a\u0628\u0627\u0631 MSE \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0639\u062f\u062f \u0627\u0644\u0623\u0634\u062c\u0627\u0631 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u0629:<\/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 style=\";text-align:right;direction:rtl\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-12143 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/aleatoireforetr1.png\" alt=\"\u0627\u062e\u062a\u0628\u0627\u0631 MSE \u0628\u0639\u062f\u062f \u0627\u0644\u0623\u0634\u062c\u0627\u0631 \u0641\u064a \u063a\u0627\u0628\u0629 \u0639\u0634\u0648\u0627\u0626\u064a\u0629 \u0641\u064a R\" width=\"449\" height=\"439\" srcset=\"\" sizes=\"\"><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0648\u064a\u0645\u0643\u0646\u0646\u0627 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062f\u0627\u0644\u0629 <strong>varImpPlot()<\/strong> \u0644\u0625\u0646\u0634\u0627\u0621 \u0645\u062e\u0637\u0637 \u064a\u0639\u0631\u0636 \u0623\u0647\u0645\u064a\u0629 \u0643\u0644 \u0645\u062a\u063a\u064a\u0631 \u0645\u062a\u0646\u0628\u0626 \u0641\u064a \u0627\u0644\u0646\u0645\u0648\u0630\u062c \u0627\u0644\u0646\u0647\u0627\u0626\u064a:<\/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 style=\";text-align:right;direction:rtl\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-12144 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/aleatoireforetr2.png\" alt=\"\u063a\u0627\u0628\u0629 \u0639\u0634\u0648\u0627\u0626\u064a\u0629 \u0641\u064a R\" width=\"424\" height=\"442\" srcset=\"\" sizes=\"\"><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u064a\u0639\u0631\u0636 \u0627\u0644\u0645\u062d\u0648\u0631 \u0627\u0644\u0633\u064a\u0646\u064a \u0645\u062a\u0648\u0633\u0637 \u0627\u0644\u0632\u064a\u0627\u062f\u0629 \u0641\u064a \u0646\u0642\u0627\u0621 \u0627\u0644\u0639\u0642\u062f\u0629 \u0644\u0623\u0634\u062c\u0627\u0631 \u0627\u0644\u0627\u0646\u062d\u062f\u0627\u0631 \u0643\u062f\u0627\u0644\u0629 \u0644\u0644\u062a\u0642\u0633\u064a\u0645 \u0639\u0628\u0631 \u0627\u0644\u0645\u062a\u0646\u0628\u0626\u064a\u0646 \u0627\u0644\u0645\u062e\u062a\u0644\u0641\u064a\u0646 \u0627\u0644\u0645\u0639\u0631\u0648\u0636\u064a\u0646 \u0639\u0644\u0649 \u0627\u0644\u0645\u062d\u0648\u0631 \u0627\u0644\u0635\u0627\u062f\u064a.<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0645\u0646 \u0627\u0644\u0631\u0633\u0645 \u0627\u0644\u0628\u064a\u0627\u0646\u064a\u060c \u064a\u0645\u0643\u0646\u0646\u0627 \u0623\u0646 \u0646\u0631\u0649 \u0623\u0646 <em>\u0627\u0644\u0631\u064a\u0627\u062d<\/em> \u0647\u064a \u0627\u0644\u0645\u062a\u063a\u064a\u0631 \u0627\u0644\u0623\u0643\u062b\u0631 \u0623\u0647\u0645\u064a\u0629\u060c \u062a\u0644\u064a\u0647\u0627 <em>\u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629<\/em> .<\/span><\/p>\n<h3 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>\u0627\u0644\u062e\u0637\u0648\u0629 3: \u0636\u0628\u0637 \u0627\u0644\u0646\u0645\u0648\u0630\u062c<\/strong><\/span><\/h3>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0627\u0641\u062a\u0631\u0627\u0636\u064a\u064b\u0627\u060c \u062a\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u062f\u0627\u0644\u0629 <strong>RandomForest()<\/strong> 500 \u0634\u062c\u0631\u0629 \u0648(\u0625\u062c\u0645\u0627\u0644\u064a \u0627\u0644\u0645\u062a\u0646\u0628\u0626\u064a\u0646\/3) \u062a\u0646\u0628\u0624\u0627\u062a \u062a\u0645 \u0627\u062e\u062a\u064a\u0627\u0631\u0647\u0627 \u0639\u0634\u0648\u0627\u0626\u064a\u064b\u0627 \u0643\u0645\u0631\u0634\u062d\u064a\u0646 \u0645\u062d\u062a\u0645\u0644\u064a\u0646 \u0644\u0643\u0644 \u062a\u0642\u0633\u064a\u0645. \u064a\u0645\u0643\u0646\u0646\u0627 \u0636\u0628\u0637 \u0647\u0630\u0647 \u0627\u0644\u0645\u0639\u0644\u0645\u0627\u062a \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0648\u0638\u064a\u0641\u0629 <strong>tuneRF()<\/strong> .<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u064a\u0648\u0636\u062d \u0627\u0644\u0643\u0648\u062f \u0627\u0644\u062a\u0627\u0644\u064a \u0643\u064a\u0641\u064a\u0629 \u0627\u0644\u0639\u062b\u0648\u0631 \u0639\u0644\u0649 \u0627\u0644\u0646\u0645\u0648\u0630\u062c \u0627\u0644\u0623\u0645\u062b\u0644 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u062a\u0627\u0644\u064a\u0629:<\/span><\/p>\n<ul style=\";text-align:right;direction:rtl\">\n<li style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>ntreeTry:<\/strong> \u0639\u062f\u062f \u0627\u0644\u0623\u0634\u062c\u0627\u0631 \u0627\u0644\u0645\u0631\u0627\u062f \u0628\u0646\u0627\u0621\u0647\u0627.<\/span><\/li>\n<li style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>mtryStart:<\/strong> \u0627\u0644\u0639\u062f\u062f \u0627\u0644\u0623\u0648\u0644\u064a \u0644\u0645\u062a\u063a\u064a\u0631\u0627\u062a \u0627\u0644\u062a\u0648\u0642\u0639 \u0627\u0644\u062a\u064a \u064a\u062c\u0628 \u0645\u0631\u0627\u0639\u0627\u062a\u0647\u0627 \u0641\u064a \u0643\u0644 \u0642\u0633\u0645.<\/span><\/li>\n<li style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>\u0639\u0627\u0645\u0644 \u0627\u0644\u062e\u0637\u0648\u0629:<\/strong> \u0639\u0627\u0645\u0644 \u0644\u0644\u0632\u064a\u0627\u062f\u0629 \u062d\u062a\u0649 \u064a\u062a\u0648\u0642\u0641 \u0627\u0644\u062e\u0637\u0623 \u0627\u0644\u0645\u0642\u062f\u0631 \u062e\u0627\u0631\u062c \u0627\u0644\u062d\u0642\u064a\u0628\u0629 \u0639\u0646 \u0627\u0644\u062a\u062d\u0633\u0646 \u0628\u0645\u0642\u062f\u0627\u0631 \u0645\u0639\u064a\u0646.<\/span><\/li>\n<li style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>\u0627\u0644\u062a\u062d\u0633\u064a\u0646:<\/strong> \u0627\u0644\u0645\u0642\u062f\u0627\u0631 \u0627\u0644\u0630\u064a \u064a\u062c\u0628 \u062a\u062d\u0633\u064a\u0646 \u062e\u0637\u0623 \u062e\u0631\u0648\u062c \u0627\u0644\u0643\u064a\u0633 \u0628\u0647 \u0644\u0645\u0648\u0627\u0635\u0644\u0629 \u0632\u064a\u0627\u062f\u0629 \u0639\u0627\u0645\u0644 \u0627\u0644\u062e\u0637\u0648\u0629.<\/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 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u062a\u0646\u062a\u062c \u0647\u0630\u0647 \u0627\u0644\u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u0645\u062e\u0637\u0637 \u0627\u0644\u062a\u0627\u0644\u064a\u060c \u0627\u0644\u0630\u064a \u064a\u0639\u0631\u0636 \u0639\u062f\u062f \u0627\u0644\u0645\u062a\u0646\u0628\u0626\u0627\u062a \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u0629 \u0639\u0646\u062f \u0643\u0644 \u062a\u0642\u0633\u064a\u0645 \u0639\u0646\u062f \u0625\u0646\u0634\u0627\u0621 \u0627\u0644\u0623\u0634\u062c\u0627\u0631 \u0639\u0644\u0649 \u0627\u0644\u0645\u062d\u0648\u0631 \u0627\u0644\u0633\u064a\u0646\u064a \u0648\u0627\u0644\u062e\u0637\u0623 \u0627\u0644\u0645\u0642\u062f\u0631 \u062e\u0627\u0631\u062c \u0627\u0644\u062d\u0642\u064a\u0628\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u062d\u0648\u0631 \u0627\u0644\u0635\u0627\u062f\u064a:<\/span> <\/p>\n<p style=\";text-align:right;direction:rtl\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-12145 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/aleatoireforetr3.png\" alt=\"\u062e\u0637\u0623 OOB \u0641\u064a \u0646\u0645\u0648\u0630\u062c \u0627\u0644\u063a\u0627\u0628\u0629 \u0627\u0644\u0639\u0634\u0648\u0627\u0626\u064a \u0641\u064a R\" width=\"433\" height=\"378\" srcset=\"\" sizes=\"\"><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u064a\u0645\u0643\u0646\u0646\u0627 \u0623\u0646 \u0646\u0631\u0649 \u0623\u0646\u0647 \u062a\u0645 \u0627\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0623\u0642\u0644 \u062e\u0637\u0623 \u0641\u064a OOB \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 <strong>\u0627\u062b\u0646\u064a\u0646 \u0645\u0646<\/strong> \u0627\u0644\u0645\u062a\u0646\u0628\u0626\u064a\u0646 \u0627\u0644\u0630\u064a\u0646 \u062a\u0645 \u0627\u062e\u062a\u064a\u0627\u0631\u0647\u0645 \u0639\u0634\u0648\u0627\u0626\u064a\u064b\u0627 \u0639\u0646\u062f \u0643\u0644 \u062a\u0642\u0633\u064a\u0645 \u0639\u0646\u062f \u0628\u0646\u0627\u0621 \u0627\u0644\u0623\u0634\u062c\u0627\u0631.<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u064a\u062a\u0648\u0627\u0641\u0642 \u0647\u0630\u0627 \u0641\u064a \u0627\u0644\u0648\u0627\u0642\u0639 \u0645\u0639 \u0627\u0644\u0625\u0639\u062f\u0627\u062f \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636\u064a (\u0625\u062c\u0645\u0627\u0644\u064a \u0627\u0644\u0645\u062a\u0646\u0628\u0626\u064a\u0646\/3 = 6\/3 = 2) \u0627\u0644\u0630\u064a \u062a\u0633\u062a\u062e\u062f\u0645\u0647 \u0627\u0644\u062f\u0627\u0644\u0629 <strong>RandomForest()<\/strong> \u0627\u0644\u0623\u0648\u0644\u064a\u0629.<\/span><\/p>\n<h3 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>\u0627\u0644\u062e\u0637\u0648\u0629 4: \u0627\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u0646\u0645\u0648\u0630\u062c \u0627\u0644\u0646\u0647\u0627\u0626\u064a \u0644\u0639\u0645\u0644 \u062a\u0646\u0628\u0624\u0627\u062a<\/strong><\/span><\/h3>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0648\u0623\u062e\u064a\u0631\u064b\u0627\u060c \u064a\u0645\u0643\u0646\u0646\u0627 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0646\u0645\u0648\u0630\u062c \u0627\u0644\u063a\u0627\u0628\u0629 \u0627\u0644\u0639\u0634\u0648\u0627\u0626\u064a\u0629 \u0627\u0644\u0645\u0639\u062f\u0644\u0629 \u0644\u0644\u062a\u0646\u0628\u0624 \u0628\u0627\u0644\u0645\u0644\u0627\u062d\u0638\u0627\u062a \u0627\u0644\u062c\u062f\u064a\u062f\u0629.<\/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 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0648\u0628\u0646\u0627\u0621 \u0639\u0644\u0649 \u0642\u064a\u0645 \u0627\u0644\u0645\u062a\u063a\u064a\u0631\u0627\u062a \u0627\u0644\u062a\u0646\u0628\u0624\u064a\u0629\u060c \u064a\u062a\u0648\u0642\u0639 \u0646\u0645\u0648\u0630\u062c \u0627\u0644\u063a\u0627\u0628\u0629 \u0627\u0644\u0639\u0634\u0648\u0627\u0626\u064a\u0629 \u0627\u0644\u0645\u062c\u0647\u0632\u0629 \u0623\u0646 \u0642\u064a\u0645\u0629 \u0627\u0644\u0623\u0648\u0632\u0648\u0646 \u0633\u062a\u0643\u0648\u0646 <b>27.19442<\/b> \u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u064a\u0648\u0645 \u0628\u0627\u0644\u0630\u0627\u062a.<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u064a\u0645\u0643\u0646 \u0627\u0644\u0639\u062b\u0648\u0631 \u0639\u0644\u0649 \u0631\u0645\u0632 R \u0627\u0644\u0643\u0627\u0645\u0644 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645 \u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u0645\u062b\u0627\u0644 <a href=\"https:\/\/github.com\/- Statorials\/R-Guides\/blob\/main\/random_forest.R\" target=\"_blank\" rel=\"noopener noreferrer\">\u0647\u0646\u0627<\/a> .<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0639\u0646\u062f\u0645\u0627 \u062a\u0643\u0648\u0646 \u0627\u0644\u0639\u0644\u0627\u0642\u0629 \u0628\u064a\u0646 \u0645\u062c\u0645\u0648\u0639\u0629 \u0645\u0646 \u0627\u0644\u0645\u062a\u063a\u064a\u0631\u0627\u062a \u0627\u0644\u0645\u062a\u0648\u0642\u0639\u0629 \u0648\u0645\u062a\u063a\u064a\u0631 \u0627\u0644\u0627\u0633\u062a\u062c\u0627\u0628\u0629 \u0645\u0639\u0642\u062f\u0629 \u0644\u0644\u063a\u0627\u064a\u0629\u060c \u0641\u0625\u0646\u0646\u0627 \u063a\u0627\u0644\u0628\u064b\u0627 \u0645\u0627 \u0646\u0633\u062a\u062e\u062f\u0645 \u0623\u0633\u0627\u0644\u064a\u0628 \u063a\u064a\u0631 \u062e\u0637\u064a\u0629 \u0644\u0646\u0645\u0630\u062c\u0629 \u0627\u0644\u0639\u0644\u0627\u0642\u0629 \u0628\u064a\u0646\u0647\u0645\u0627. \u0625\u062d\u062f\u0649 \u0647\u0630\u0647 \u0627\u0644\u0637\u0631\u0642 \u0647\u064a \u0628\u0646\u0627\u0621 \u0634\u062c\u0631\u0629 \u0627\u0644\u0642\u0631\u0627\u0631 . \u0648\u0645\u0639 \u0630\u0644\u0643\u060c \u0641\u0625\u0646 \u0627\u0644\u062c\u0627\u0646\u0628 \u0627\u0644\u0633\u0644\u0628\u064a \u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0634\u062c\u0631\u0629 \u0642\u0631\u0627\u0631 \u0648\u0627\u062d\u062f\u0629 \u0647\u0648 \u0623\u0646\u0647\u0627 \u062a\u0645\u064a\u0644 \u0625\u0644\u0649 \u0627\u0644\u0645\u0639\u0627\u0646\u0627\u0629 \u0645\u0646 \u0627\u0644\u062a\u0628\u0627\u064a\u0646 \u0627\u0644\u0639\u0627\u0644\u064a . \u0623\u064a \u0623\u0646\u0646\u0627 \u0625\u0630\u0627 \u0642\u0633\u0645\u0646\u0627 \u0645\u062c\u0645\u0648\u0639\u0629 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0625\u0644\u0649 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u0643\u064a\u0641\u064a\u0629 \u0625\u0646\u0634\u0627\u0621 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