{"id":1861,"date":"2023-07-24T16:53:11","date_gmt":"2023-07-24T16:53:11","guid":{"rendered":"https:\/\/statorials.org\/ar\/%d8%ba%d9%8a%d8%b1-%d9%85%d8%aa%d9%88%d9%81%d8%b1\/"},"modified":"2023-07-24T16:53:11","modified_gmt":"2023-07-24T16:53:11","slug":"%d8%ba%d9%8a%d8%b1-%d9%85%d8%aa%d9%88%d9%81%d8%b1","status":"publish","type":"post","link":"https:\/\/statorials.org\/ar\/%d8%ba%d9%8a%d8%b1-%d9%85%d8%aa%d9%88%d9%81%d8%b1\/","title":{"rendered":"\u0643\u064a\u0641\u064a\u0629 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 is.na \u0641\u064a r (\u0645\u0639 \u0623\u0645\u062b\u0644\u0629)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p style=\";text-align:right;direction:rtl\"><span style=\"color: #000000;\">\u064a\u0645\u0643\u0646\u0643 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062f\u0627\u0644\u0629 <strong>is.na()<\/strong> \u0641\u064a R \u0644\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0642\u064a\u0645 \u0627\u0644\u0645\u0641\u0642\u0648\u062f\u0629 \u0641\u064a \u0627\u0644\u0645\u062a\u062c\u0647\u0627\u062a \u0648\u0625\u0637\u0627\u0631\u0627\u062a \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#check if each individual value is NA\n<\/span>is. <span style=\"color: #3366ff;\">na<\/span> (x)\n\n<span style=\"color: #008080;\">#count total NA values\n<\/span>sum( <span style=\"color: #3366ff;\">is.na<\/span> (x))\n\n<span style=\"color: #008080;\">#identify positions of NA values\n<\/span>which(is. <span style=\"color: #3366ff;\">na<\/span> (x))\n<\/strong><\/pre>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u062a\u0648\u0636\u062d \u0627\u0644\u0623\u0645\u062b\u0644\u0629 \u0627\u0644\u062a\u0627\u0644\u064a\u0629 \u0643\u064a\u0641\u064a\u0629 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0647\u0630\u0647 \u0627\u0644\u0648\u0638\u064a\u0641\u0629 \u0639\u0645\u0644\u064a\u064b\u0627.<\/span><\/p>\n<h3 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>\u0645\u062b\u0627\u0644 1: \u0627\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u062f\u0627\u0644\u0629 is.na()\u200e \u0645\u0639 \u0627\u0644\u0645\u062a\u062c\u0647\u0627\u062a<\/strong><\/span><\/h3>\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 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062f\u0627\u0644\u0629 <strong>is.na()<\/strong> \u0644\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0642\u064a\u0645 \u0627\u0644\u0645\u0641\u0642\u0648\u062f\u0629 \u0641\u064a \u0627\u0644\u0645\u062a\u062c\u0647:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#define vector with some missing values\n<span style=\"color: #000000;\">x &lt;- c(3, 5, 5, NA, 7, NA, 12, 16)<\/span>\n\n#check if each individual value is NA\n<\/span>is. <span style=\"color: #3366ff;\">na<\/span> (x)\n\n[1] FALSE FALSE FALSE TRUE FALSE TRUE FALSE FALSE\n\n<span style=\"color: #008080;\">#count total NA values\n<\/span>sum( <span style=\"color: #3366ff;\">is.na<\/span> (x))\n\n[1] 2\n\n<span style=\"color: #008080;\">#identify positions of NA values\n<\/span>which(is. <span style=\"color: #3366ff;\">na<\/span> (x))\n\n[1] 4 6\n<\/strong><\/pre>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0648\u0645\u0646 \u0627\u0644\u0646\u062a\u064a\u062c\u0629 \u064a\u0645\u0643\u0646\u0646\u0627 \u0623\u0646 \u0646\u0631\u0649:<\/span><\/p>\n<ul style=\";text-align:right;direction:rtl\">\n<li style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0647\u0646\u0627\u0643 \u0642\u064a\u0645\u062a\u0627\u0646 \u0645\u0641\u0642\u0648\u062f\u062a\u0627\u0646 \u0641\u064a \u0627\u0644\u0645\u062a\u062c\u0647.<\/span><\/li>\n<li style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0627\u0644\u0642\u064a\u0645 \u0627\u0644\u0645\u0641\u0642\u0648\u062f\u0629 \u0645\u0648\u062c\u0648\u062f\u0629 \u0641\u064a \u0627\u0644\u0645\u0648\u0636\u0639 4 \u0648 6.<\/span><\/li>\n<\/ul>\n<h3 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>\u0645\u062b\u0627\u0644 2:<\/strong><\/span> <span style=\"color: #000000;\"><strong>\u0627\u0633\u062a\u062e\u062f\u0645 is.na() \u0645\u0639 \u0625\u0637\u0627\u0631\u0627\u062a \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a<\/strong><\/span><\/h3>\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 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062f\u0627\u0644\u0629 is.na() \u0644\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0642\u064a\u0645 \u0627\u0644\u0645\u0641\u0642\u0648\u062f\u0629 \u0641\u064a \u0625\u0637\u0627\u0631 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (var1=c(1, 3, 3, 4, 5),\n                 var2=c(7, NA, NA, 3, 2),\n                 var3=c(3, 3, 6, NA, 8),\n                 var4=c(NA, 1, 2, 8, 9))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n  var1 var2 var3 var4\n1 1 7 3 NA\n2 3 NA 3 1\n3 3 NA 6 2\n4 4 3 NA 8\n5 5 2 8 9\n\n<span style=\"color: #008080;\">#find total NA values in data frame\n<\/span>sum( <span style=\"color: #3366ff;\">is.na<\/span> (df))\n\n[1] 4\n\n<span style=\"color: #008080;\">#find total NA values by column\n<\/span>sapply(df, <span style=\"color: #008000;\">function<\/span> (x) sum(is. <span style=\"color: #3366ff;\">na<\/span> (x)))\n\nvar1 var2 var3 var4 \n   0 2 1 1<\/span><\/span><\/strong><\/pre>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u0645\u0646 \u0627\u0644\u0625\u062e\u0631\u0627\u062c \u064a\u0645\u0643\u0646\u0646\u0627 \u0623\u0646 \u0646\u0631\u0649 \u0623\u0646 \u0647\u0646\u0627\u0643 <strong>4<\/strong> \u0642\u064a\u0645 NA \u0625\u062c\u0645\u0627\u0644\u064a\u0629 \u0641\u064a \u0625\u0637\u0627\u0631 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a.<\/span><\/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\u064a\u0636\u064b\u0627:<\/span><\/p>\n<ul style=\";text-align:right;direction:rtl\">\n<li style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u062a\u0648\u062c\u062f <strong>0<\/strong> \u0642\u064a\u0645 NA \u0641\u064a \u0627\u0644\u0639\u0645\u0648\u062f &#8220;var1&#8221;.<\/span><\/li>\n<li style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u062a\u0648\u062c\u062f \u0642\u064a\u0645\u062a\u0627\u0646 <strong>NA<\/strong> \u0641\u064a \u0627\u0644\u0639\u0645\u0648\u062f &#8220;var2&#8221;.<\/span><\/li>\n<li style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u062a\u0648\u062c\u062f \u0642\u064a\u0645 NA <strong>\u0648\u0627\u062d\u062f\u0629<\/strong> \u0641\u064a \u0627\u0644\u0639\u0645\u0648\u062f &#8220;var3&#8221;.<\/span><\/li>\n<li style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u062a\u0648\u062c\u062f \u0642\u064a\u0645 NA <strong>\u0648\u0627\u062d\u062f\u0629<\/strong> \u0641\u064a \u0627\u0644\u0639\u0645\u0648\u062f &#8220;var4&#8221;.<\/span><\/li>\n<\/ul>\n<h3 style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\"><strong>\u0645\u0635\u0627\u062f\u0631 \u0625\u0636\u0627\u0641\u064a\u0629<\/strong><\/span><\/h3>\n<p style=\";text-align:right;direction:rtl\"> <span style=\"color: #000000;\">\u062a\u0634\u0631\u062d \u0627\u0644\u0628\u0631\u0627\u0645\u062c \u0627\u0644\u062a\u0639\u0644\u064a\u0645\u064a\u0629 \u0627\u0644\u062a\u0627\u0644\u064a\u0629 \u0627\u0644\u0648\u0638\u0627\u0626\u0641 \u0627\u0644\u0645\u0641\u064a\u062f\u0629 \u0627\u0644\u0623\u062e\u0631\u0649 \u0627\u0644\u062a\u064a \u064a\u0645\u0643\u0646 \u0627\u0633\u062a\u062e\u062f\u0627\u0645\u0647\u0627 \u0644\u0645\u0639\u0627\u0644\u062c\u0629 \u0627\u0644\u0642\u064a\u0645 \u0627\u0644\u0645\u0641\u0642\u0648\u062f\u0629 \u0641\u064a R.<\/span><\/p>\n<p style=\";text-align:right;direction:rtl\"> <a href=\"https:\/\/statorials.org\/ar\/\u063a-\u062d\u0630\u0641-\u0641\u064a-\u0635\/\" target=\"_blank\" rel=\"noopener\">\u0643\u064a\u0641\u064a\u0629 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 na.omit \u0641\u064a R<\/a><br \/> <a href=\"https:\/\/statorials.org\/ar\/\u063a-\u0645\/\" target=\"_blank\" rel=\"noopener\">\u0643\u064a\u0641\u064a\u0629 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 na.rm \u0641\u064a R<\/a><br \/> <a href=\"https:\/\/statorials.org\/ar\/\u0647\u0648-\u0635\u0641\u0631-\u0641\u064a-\u0635\/\">\u0643\u064a\u0641\u064a\u0629 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 is.null \u0641\u064a R<\/a><br \/> <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\">\u0643\u064a\u0641\u064a\u0629 \u0627\u062d\u062a\u0633\u0627\u0628 \u062c\u0645\u064a\u0639 \u0627\u0644\u0642\u064a\u0645 \u0627\u0644\u0645\u0641\u0642\u0648\u062f\u0629 \u0641\u064a R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u064a\u0645\u0643\u0646\u0643 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062f\u0627\u0644\u0629 is.na() \u0641\u064a R \u0644\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0642\u064a\u0645 \u0627\u0644\u0645\u0641\u0642\u0648\u062f\u0629 \u0641\u064a \u0627\u0644\u0645\u062a\u062c\u0647\u0627\u062a \u0648\u0625\u0637\u0627\u0631\u0627\u062a \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a. #check if each individual value is NA is. na (x) #count total NA values sum( is.na (x)) #identify positions of NA values which(is. na (x)) \u062a\u0648\u0636\u062d \u0627\u0644\u0623\u0645\u062b\u0644\u0629 \u0627\u0644\u062a\u0627\u0644\u064a\u0629 \u0643\u064a\u0641\u064a\u0629 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0647\u0630\u0647 \u0627\u0644\u0648\u0638\u064a\u0641\u0629 \u0639\u0645\u0644\u064a\u064b\u0627. \u0645\u062b\u0627\u0644 1: \u0627\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u062f\u0627\u0644\u0629 is.na()\u200e \u0645\u0639 \u0627\u0644\u0645\u062a\u062c\u0647\u0627\u062a \u064a\u0648\u0636\u062d [&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 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 is.na \u0641\u064a R (\u0645\u0639 \u0623\u0645\u062b\u0644\u0629) - Statorials<\/title>\n<meta name=\"description\" content=\"\u064a\u0634\u0631\u062d \u0647\u0630\u0627 \u0627\u0644\u0628\u0631\u0646\u0627\u0645\u062c \u0627\u0644\u062a\u0639\u0644\u064a\u0645\u064a \u0643\u064a\u0641\u064a\u0629 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062f\u0627\u0644\u0629 is.na() \u0641\u064a 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