{"id":1207,"date":"2023-07-27T07:12:26","date_gmt":"2023-07-27T07:12:26","guid":{"rendered":"https:\/\/statorials.org\/tr\/rdeki-tarih-araligina-gore-alt-kume\/"},"modified":"2023-07-27T07:12:26","modified_gmt":"2023-07-27T07:12:26","slug":"rdeki-tarih-araligina-gore-alt-kume","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/rdeki-tarih-araligina-gore-alt-kume\/","title":{"rendered":"R'de bir tarih aral\u0131\u011f\u0131na g\u00f6re alt tan\u0131mlama nas\u0131l yap\u0131l\u0131r (\u00f6rneklerle)"},"content":{"rendered":"

<\/p>\n

\n

Bir veri \u00e7er\u00e7evesini R’deki bir tarih aral\u0131\u011f\u0131na g\u00f6re alt tan\u0131mlaman\u0131n en basit yolu a\u015fa\u011f\u0131daki s\u00f6zdizimini kullanmakt\u0131r:<\/span><\/p>\n

 df[df$date >=<\/span> \" some date<\/span> \" &<\/span> df$date <=<\/span> \" some date<\/span> \", ]\n<\/strong><\/pre>\n
 Bu e\u011fitimde bu i\u015flevin pratik kullan\u0131m\u0131na ili\u015fkin \u00e7e\u015fitli \u00f6rnekler verilmektedir.<\/span><\/p>\n
 \u00d6rnek 1: iki tarih aras\u0131ndaki alt k\u00fcme<\/strong><\/span><\/h3>\n
 A\u015fa\u011f\u0131daki kod, iki kapsay\u0131c\u0131 tarih aras\u0131ndaki veri \u00e7er\u00e7evesindeki sat\u0131rlar\u0131n nas\u0131l se\u00e7ilece\u011fini g\u00f6sterir:<\/span><\/p>\n
 #make this example reproducible\n<\/span>set.seed(0)\n\n#create data frame\n<\/span>df <- data.frame(date = as<\/span> . Date<\/span> (\" 2021-01-01<\/span> \") - 0:19,\n                 sales = runif<\/span> (20, 10, 500) + seq<\/span> (50, 69)^2)\n\n#view first six rows<\/span>\nhead(df)\n\n        dirty date\n1 2021-01-01 2949,382\n2 2020-12-31 2741.099\n3 2020-12-30 2896.341\n4 2020-12-29 3099.698\n5 2020-12-28 3371.022\n6 2020-12-27 3133.824\n\n#subset between two dates, inclusive<\/span>\ndf[df$date >=<\/span> \" 2020-12-25<\/span> \" &<\/span> df$date <=<\/span> \" 2020-12-28<\/span> \", ]\n\n        dirty dates\n5 2020-12-28 3371.022\n6 2020-12-27 3133.824\n7 2020-12-26 3586.211\n8 2020-12-25 3721.891\n<\/strong><\/pre>\n
 \u0130ki \u00f6zel tarih aras\u0131ndaki \u00e7izgileri se\u00e7mek i\u00e7in \u00fcst ve alt i\u015faretleri de\u011fi\u015ftirmeniz yeterlidir:<\/span><\/p>\n
 #make this example reproducible\n<\/span>set.seed(0)\n\n#create data frame\n<\/span>df <- data.frame(date = as<\/span> . Date<\/span> (\" 2021-01-01<\/span> \") - 0:19,\n                 sales = runif<\/span> (20, 10, 500) + seq<\/span> (50, 69)^2)\n\n#subset between two dates, exclusive<\/span>\ndf[df$date ><\/span> \" 2020-12-25<\/span> \" &<\/span> df$date <<\/span> \" 2020-12-28<\/span> \", ]\n\n        dirty date\n6 2020-12-27 3133.824\n7 2020-12-26 3586.211\n<\/strong><\/pre>\n
 \u00d6rnek 2: belirli bir tarihten sonraki alt k\u00fcme<\/strong><\/span><\/h3>\n
 A\u015fa\u011f\u0131daki kod, belirli bir tarihten sonra g\u00f6r\u00fcnen bir veri \u00e7er\u00e7evesindeki sat\u0131rlar\u0131n nas\u0131l se\u00e7ilece\u011fini g\u00f6sterir:<\/span><\/p>\n
 #make this example reproducible\n<\/span>set.seed(0)\n\n#create data frame\n<\/span>df <- data.frame(date = as<\/span> . Date<\/span> (\" 2021-01-01<\/span> \") - 0:19,\n                 sales = runif<\/span> (20, 10, 500) + seq<\/span> (50, 69)^2)\n\n#subset after a certain date<\/span>\ndf[df$date >=<\/span> \" 2020-12-22<\/span> \", ]\n\n         dirty dates\n1 2021-01-01 2949.382\n2 2020-12-31 2741.099\n3 2020-12-30 2896.341\n4 2020-12-29 3099.698\n5 2020-12-28 3371.022\n6 2020-12-27 3133.824\n7 2020-12-26 3586.211\n8 2020-12-25 3721.891\n9 2020-12-24 3697.791\n10 2020-12-23 3799.266\n11 2020-12-22 3640.275<\/strong><\/pre>\n
 \u00d6rnek 3: belirli bir tarihten \u00f6nceki alt k\u00fcme<\/strong><\/span><\/h3>\n
 A\u015fa\u011f\u0131daki kod, belirli bir tarihten \u00f6nce olu\u015fan bir veri \u00e7er\u00e7evesinden sat\u0131rlar\u0131n nas\u0131l se\u00e7ilece\u011fini g\u00f6sterir:<\/span><\/p>\n
 #make this example reproducible\n<\/span>set.seed(0)\n\n#create data frame\n<\/span>df <- data.frame(date = as<\/span> . Date<\/span> (\" 2021-01-01<\/span> \") - 0:19,\n                 sales = runif<\/span> (20, 10, 500) + seq<\/span> (50, 69)^2)\n\n#subset before a certain date<\/span>\ndf[df$date <<\/span> \" 2020-12-22<\/span> \", ]\n\n         dirty date\n12 2020-12-21 3831.928\n13 2020-12-20 3940.513\n14 2020-12-19 4315.641\n15 2020-12-18 4294.211\n16 2020-12-17 4612.222\n17 2020-12-16 4609.873\n18 2020-12-15 4850.633\n19 2020-12-14 5120.034\n20 2020-12-13 4957.217<\/strong><\/pre>\n
 Ek kaynaklar<\/strong><\/span><\/h3>\n
 R’de bir zaman serisi nas\u0131l \u00e7izilir<\/a>
 R’deki tarihten y\u0131l nas\u0131l \u00e7\u0131kar\u0131l\u0131r<\/a>
 R’de g\u00fcnl\u00fck veriler ayl\u0131k ve y\u0131ll\u0131k veriler halinde nas\u0131l toplan\u0131r?<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Bir veri \u00e7er\u00e7evesini R’deki bir tarih aral\u0131\u011f\u0131na g\u00f6re alt tan\u0131mlaman\u0131n en basit yolu a\u015fa\u011f\u0131daki s\u00f6zdizimini kullanmakt\u0131r: df[df$date >= ” some date ” & df$date <= ” some date “, ] Bu e\u011fitimde bu i\u015flevin pratik kullan\u0131m\u0131na ili\u015fkin \u00e7e\u015fitli \u00f6rnekler verilmektedir. \u00d6rnek 1: iki tarih aras\u0131ndaki alt k\u00fcme A\u015fa\u011f\u0131daki kod, iki kapsay\u0131c\u0131 tarih aras\u0131ndaki veri \u00e7er\u00e7evesindeki […]<\/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":[],"class_list":["post-1207","post","type-post","status-publish","format-standard","hentry","category-rehber"],"yoast_head":"\nR'de bir tarih aral\u0131\u011f\u0131na g\u00f6re alt tan\u0131mlama nas\u0131l yap\u0131l\u0131r (\u00f6rneklerle)<\/title>\n<meta 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