{"id":2439,"date":"2023-07-22T06:40:55","date_gmt":"2023-07-22T06:40:55","guid":{"rendered":"https:\/\/statorials.org\/pl\/r-warunkowo-zamien-wartosci-w-ramce-danych\/"},"modified":"2023-07-22T06:40:55","modified_gmt":"2023-07-22T06:40:55","slug":"r-warunkowo-zamien-wartosci-w-ramce-danych","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/r-warunkowo-zamien-wartosci-w-ramce-danych\/","title":{"rendered":"Odp.: jak warunkowo zast\u0105pi\u0107 warto\u015bci w ramce danych"},"content":{"rendered":"

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Aby warunkowo zast\u0105pi\u0107 warto\u015bci w ramce danych, mo\u017cesz u\u017cy\u0107 jednej z nast\u0119puj\u0105cych metod:<\/span><\/span><\/p>\n

Metoda 1: Zamie\u0144 warto\u015bci w ca\u0142ej ramce danych<\/strong><\/span><\/p>\n

 #replace all values in data frame equal to 30 with 0<\/span>\ndf[df ==<\/span> 30<\/span> ] <- 0\n<\/strong><\/pre>\n
 Metoda 2: Zamie\u0144 warto\u015bci w okre\u015blonej kolumnie<\/strong><\/span><\/p>\n
 #replace values equal to 30 in 'col1' with 0<\/span>\ndf$col1[df$col1 ==<\/span> 30<\/span> ] <- 0\n<\/strong><\/pre>\n
 Metoda 3: Zast\u0105p warto\u015bci w okre\u015blonej kolumnie na podstawie innej kolumny<\/strong><\/span><\/p>\n
 #replace values in col2 with 0 based on rows in col1 equal to 30<\/span>\ndf$col2[df$col1 ==<\/span> 30<\/span> ] <- 0 \n<\/strong><\/pre>\n
 Poni\u017csze przyk\u0142ady pokazuj\u0105, jak w praktyce zastosowa\u0107 ka\u017cd\u0105 metod\u0119 z nast\u0119puj\u0105c\u0105 ramk\u0105 danych:<\/span><\/p>\n
 #create data frame\ndf <- data. frame<\/span> (team=c('A', 'A', 'B', 'B', 'B'),\n                 points=c(99, 90, 90, 88, 88),\n                 assists=c(33, 28, 31, 30, 34),\n                 rebounds=c(30, 30, 24, 24, 28))\n\n#view data frame\n<\/span>df\n\n  team points assists rebounds\n1 A 99 33 30\n2 A 90 28 30\n3 B 90 31 24\n4 B 88 30 24\n5 B 88 34 28\n<\/span><\/span><\/strong><\/pre>\n
 Metoda 1: Zamie\u0144 warto\u015bci w ca\u0142ej ramce danych<\/strong><\/span><\/h3>\n
 Poni\u017cszy kod pokazuje, jak zamieni\u0107 wszystkie warto\u015bci r\u00f3wne 30 w ramce danych na 0:<\/span><\/p>\n
 #replace all values in data frame equal to 30 with 0<\/span>\ndf[df ==<\/span> 30<\/span> ] <- 0\n\n#view updated data frame<\/span>\ndf\n  team points assists rebounds\n1 A 99 33 0\n2 A 90 28 0\n3 B 90 31 24\n4 B 88 0 24\n5 B 88 34 28\n<\/strong><\/pre>\n
 Metoda 2: Zamie\u0144 warto\u015bci w okre\u015blonej kolumnie<\/strong><\/span><\/h3>\n
 Poni\u017cszy kod pokazuje jak zamieni\u0107 wszystkie warto\u015bci r\u00f3wne 90 w kolumnie \u201epunkty\u201d na 0:<\/span><\/p>\n
 #replace all values equal to 90 in 'points' column with 0\n<\/span>df$points[df$points ==<\/span> 90<\/span> ] <- 0\n\n#view updated data frame\n<\/span>df\n\n  team points assists rebounds\n1 A 99 33 30\n2 A 0 28 30\n3 B 0 31 24\n4 B 88 30 24\n5 B 88 34 28\n<\/strong><\/pre>\n
 Metoda 3: Zast\u0105p warto\u015bci w okre\u015blonej kolumnie na podstawie innej kolumny<\/strong><\/span><\/h3>\n
 Poni\u017cszy kod pokazuje jak zamieni\u0107 warto\u015bci w kolumnie \u201epunkty\u201d na 0, gdzie warto\u015b\u0107 w kolumnie \u201ezesp\u00f3\u0142\u201d r\u00f3wna si\u0119 \u201eB\u201d.<\/span><\/p>\n
 #replace all values equal to 90 in 'points' column with 0\n<\/span>df$points[df$team ==<\/span> ' B<\/span> '] <- 0\n\n#view updated data frame\n<\/span>df\n\n  team points assists rebounds\n1 A 99 33 30\n2 A 90 28 30\n3 B 0 31 24\n4 B 0 30 24\n5 B 0 34 28<\/strong><\/pre>\n
 Dodatkowe zasoby<\/strong><\/span><\/h3>\n
 Poni\u017csze samouczki wyja\u015bniaj\u0105, jak wykonywa\u0107 inne typowe operacje w j\u0119zyku R:<\/span><\/p>\n
 Odp.: Jak scali\u0107 ramki danych w oparciu o wiele kolumn<\/a>
 Odp.: Jak doda\u0107 kolumn\u0119 do ramki danych na podstawie innych kolumn<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Aby warunkowo zast\u0105pi\u0107 warto\u015bci w ramce danych, mo\u017cesz u\u017cy\u0107 jednej z nast\u0119puj\u0105cych metod: Metoda 1: Zamie\u0144 warto\u015bci w ca\u0142ej ramce danych #replace all values in data frame equal to 30 with 0 df[df == 30 ] <- 0 Metoda 2: Zamie\u0144 warto\u015bci w okre\u015blonej kolumnie #replace values equal to 30 in 'col1′ with 0 df$col1[df$col1 […]<\/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-2439","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"\nOdp.: Jak warunkowo zast\u0105pi\u0107 warto\u015bci w ramce danych - Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak zast\u0105pi\u0107 warto\u015bci w ramce danych w R na podstawie okre\u015blonych warunk\u00f3w, 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\/r-warunkowo-zamien-wartosci-w-ramce-danych\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Odp.: Jak warunkowo zast\u0105pi\u0107 warto\u015bci w ramce danych - 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