{"id":1205,"date":"2023-07-27T07:12:26","date_gmt":"2023-07-27T07:12:26","guid":{"rendered":"https:\/\/statorials.org\/pl\/podzbior-wedlug-zakresu-dat-w-r\/"},"modified":"2023-07-27T07:12:26","modified_gmt":"2023-07-27T07:12:26","slug":"podzbior-wedlug-zakresu-dat-w-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/podzbior-wedlug-zakresu-dat-w-r\/","title":{"rendered":"Jak poddefiniowa\u0107 wed\u0142ug zakresu dat w r (z przyk\u0142adami)"},"content":{"rendered":"

<\/p>\n

\n

Najprostszym sposobem na poddefiniowanie ramki danych wed\u0142ug zakresu dat w R jest u\u017cycie nast\u0119puj\u0105cej sk\u0142adni:<\/span><\/p>\n

 df[df$date >=<\/span> \" some date<\/span> \" &<\/span> df$date <=<\/span> \" some date<\/span> \", ]\n<\/strong><\/pre>\n
 W tym samouczku znajdziesz kilka przyk\u0142ad\u00f3w praktycznego wykorzystania tej funkcji.<\/span><\/p>\n
 Przyk\u0142ad 1: podzbi\u00f3r dw\u00f3ch dat<\/strong><\/span><\/h3>\n
 Poni\u017cszy kod pokazuje, jak wybra\u0107 wiersze w ramce danych pomi\u0119dzy dwiema datami w\u0142\u0105cznie:<\/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
 Po prostu zmodyfikuj g\u00f3rny i dolny znak, aby zaznaczy\u0107 linie pomi\u0119dzy dwiema ekskluzywnymi datami:<\/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
 Przyk\u0142ad 2: podzbi\u00f3r po okre\u015blonej dacie<\/strong><\/span><\/h3>\n
 Poni\u017cszy kod pokazuje, jak wybra\u0107 wiersze w ramce danych, kt\u00f3re pojawiaj\u0105 si\u0119 po okre\u015blonej dacie:<\/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$date >=<\/span> \" 2020-12-22<\/span> \", ]\n\n         dirty dates\n1 2021-01-01 2949.382\n2 2020-12-31 2741.099\n3 2020-12-30 2896.341\n4 2020-12-29 3099.698\n5 2020-12-28 3371.022\n6 2020-12-27 3133.824\n7 2020-12-26 3586.211\n8 2020-12-25 3721.891\n9 2020-12-24 3697.791\n10 2020-12-23 3799.266\n11 2020-12-22 3640.275<\/strong><\/pre>\n
 Przyk\u0142ad 3: podzbi\u00f3r przed okre\u015blon\u0105 dat\u0105<\/strong><\/span><\/h3>\n
 Poni\u017cszy kod pokazuje, jak wybra\u0107 wiersze z ramki danych, kt\u00f3re wyst\u0119puj\u0105 przed okre\u015blon\u0105 dat\u0105:<\/span><\/p>\n
 #make this example reproducible\n<\/span>set.seed(0)\n\n#create data frame\n<\/span>df <- data.frame(date = as<\/span> . Date<\/span> (\" 2021-01-01<\/span> \") - 0:19,\n                 sales = runif<\/span> (20, 10, 500) + seq<\/span> (50, 69)^2)\n\n#subset before a certain date<\/span>\ndf[df$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
 Dodatkowe zasoby<\/strong><\/span><\/h3>\n
 Jak wykre\u015bli\u0107 szereg czasowy w R<\/a>
 Jak wyodr\u0119bni\u0107 rok z daty w R<\/a>
 Jak agregowa\u0107 dane dzienne na dane miesi\u0119czne i roczne w R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Najprostszym sposobem na poddefiniowanie ramki danych wed\u0142ug zakresu dat w R jest u\u017cycie nast\u0119puj\u0105cej sk\u0142adni: df[df$date >= ” some date ” & df$date <= ” some date „, ] W tym samouczku znajdziesz kilka przyk\u0142ad\u00f3w praktycznego wykorzystania tej funkcji. Przyk\u0142ad 1: podzbi\u00f3r dw\u00f3ch dat Poni\u017cszy kod pokazuje, jak wybra\u0107 wiersze w ramce danych pomi\u0119dzy dwiema […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1205","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"\nJak poddefiniowa\u0107 wed\u0142ug zakresu dat w R (z przyk\u0142adami)<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak poddefiniowa\u0107 ramk\u0119 danych wed\u0142ug zakresu dat w j\u0119zyku R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/pl\/podzbior-wedlug-zakresu-dat-w-r\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak poddefiniowa\u0107 wed\u0142ug zakresu dat w R (z przyk\u0142adami)\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak poddefiniowa\u0107 ramk\u0119 danych wed\u0142ug zakresu dat w j\u0119zyku R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/podzbior-wedlug-zakresu-dat-w-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T07:12:26+00:00\" \/>\n<meta name=\"author\" content=\"Benjamin Anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin Anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/podzbior-wedlug-zakresu-dat-w-r\/\",\"url\":\"https:\/\/statorials.org\/pl\/podzbior-wedlug-zakresu-dat-w-r\/\",\"name\":\"Jak poddefiniowa\u0107 wed\u0142ug zakresu dat w R (z przyk\u0142adami)\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-27T07:12:26+00:00\",\"dateModified\":\"2023-07-27T07:12:26+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak poddefiniowa\u0107 ramk\u0119 danych wed\u0142ug zakresu dat w j\u0119zyku R, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/podzbior-wedlug-zakresu-dat-w-r\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/podzbior-wedlug-zakresu-dat-w-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/podzbior-wedlug-zakresu-dat-w-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak poddefiniowa\u0107 wed\u0142ug zakresu dat w r (z przyk\u0142adami)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pl\/#website\",\"url\":\"https:\/\/statorials.org\/pl\/\",\"name\":\"Statorials\",\"description\":\"Tw\u00f3j przewodnik po kompetencjach statystycznych!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pl-PL\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\",\"name\":\"Benjamin Anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin Anderson\"},\"description\":\"Cze\u015b\u0107, jestem Benjamin i jestem emerytowanym profesorem statystyki, kt\u00f3ry zosta\u0142 oddanym nauczycielem Statorials. 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