在R中使用具有多個條件的gsub函數

Question

關注問題在數據框中搜索唯一值並使用它們創建表

這是我的數據的樣子

    UUID    Source
1   Jane    http//mywebsite.com44bb00?utm_source=ADW&utm_medium=banner&utm_campaign=Monk&gclid1234
2   Mike    http//mywebsite.com44bb00?utm_source=Google&utm_medium=cpc&utm_campaign=DOG&gclid1234
3   John    http//mywebsite.com44bb00?utm_source=Yahoo&utm_medium=banner&utm_campaign=DOG&gclid1234
4   Sarah   http//mywebsite.com44bb00?utm_source=Facebookdw&utm_medium=cpc&utm_campaign=CAT&gclid1234
5   Michael http//mywebsite.com44bb00?utm_source=Twitter&utm_medium=GDNr&utm_campaign=CAT&gclid1234
6   Bob     http//mywebsite.com44bb00?utm_source=ADW&utm_medium=GDN&utm_campaign=DOG&gclid1234
7   Mark    http//mywebsite.com44bb00?utm_source=Twitter&utm_medium=banner&utm_campaign=MONK&gclid1234
8   Anna    http//mywebsite.com44bb00?utm_source=Facebook&utm_medium=banner&utm_campaign=MONK&gclid1234

這是我想要實現的目標輸出

    NAME    UTM_SOURCE  UTM_MEDIUM  UTM_CAMPAIGN
1   Jane    ADW             banner     Monk
2   Mike    Google          cpc        DOG
3   John    Yahoo           banner     DOG
4   Sarah   Faceboo         cpc        CAT
5   Michael Twitter         GDN        CAT
6   Bob     ADW             GDN        DOG
7   Mark    Twitter         banner     MONK
8   Anna    Facebook        banner     MONK

換句話說，我想要的是根據標准獲得特定的信息。 示例：在數據框中搜索值“utmsource =”，找到后，復制“=”和“＆”符號之間的任何信息。 對於用戶no1（Jame），如果查看原始文件，則她的源URL包含值“utm_source = ADW”。 在輸出文件中，“ADW”位被提取並插入名為“utm_source”的新列中。 所有其他用戶和其他維度的相同原則（utm_medium＆utm_campaign）

我明白gsub函數可以幫助我。 這是我到目前為止所嘗試的：

> file1 <- read.csv("C:/Users/Dumitru Ostaciu/Desktop/Users.csv")
> file1 <- transform(file1, Source = as.character(Source))
> file2 <- gsub(".*\\?utm_source=", "", file1$Source)

這就是我得到的結果

  UUID  SOURCE
    1   ADW&utm_medium=banner&utm_campaign=Monk&gclid1234
    2   Google&utm_medium=cpc&utm_campaign=DOG&gclid1234
    3   Yahoo&utm_medium=banner&utm_campaign=DOG&gclid1234
    4   Facebookdw&utm_medium=cpc&utm_campaign=CAT&gclid1234
    5   Twitter&utm_medium=GDNr&utm_campaign=CAT&gclid1234
    6   ADW&utm_medium=GDN&utm_campaign=DOG&gclid1234
    7   Twitter&utm_medium=banner&utm_campaign=MONK&gclid1234
    8   Facebook&utm_medium=banner&utm_campaign=MONK&gclid1234   

我有兩個問題：

1）在我得到的輸出中，該函數復制了值“utm_source-”之后的所有內容。 如何添加另一個維度以使公式僅復制“=”和“＆”之間的內容

2）我如何保留最初在第一列（UUID），Jane，Mike，John等中的值？

Answer 1

你需要做兩件事：

1. 使用gsub從源中刪除網站名稱
2. 使用strsplit分隔每次出現的剩余字符串?

讀入數據：

x <- read.table(text="
UUID    Source
1   Jane    http//mywebsite.com44bb00?utm_source=ADW&utm_medium=banner&utm_campaign=Monk&gclid1234
2   Mike    http//mywebsite.com44bb00?utm_source=Google&utm_medium=cpc&utm_campaign=DOG&gclid1234
3   John    http//mywebsite.com44bb00?utm_source=Yahoo&utm_medium=banner&utm_campaign=DOG&gclid1234
4   Sarah   http//mywebsite.com44bb00?utm_source=Facebookdw&utm_medium=cpc&utm_campaign=CAT&gclid1234
5   Michael http//mywebsite.com44bb00?utm_source=Twitter&utm_medium=GDNr&utm_campaign=CAT&gclid1234
6   Bob     http//mywebsite.com44bb00?utm_source=ADW&utm_medium=GDN&utm_campaign=DOG&gclid1234
7   Mark    http//mywebsite.com44bb00?utm_source=Twitter&utm_medium=banner&utm_campaign=MONK&gclid1234
8   Anna    http//mywebsite.com44bb00?utm_source=Facebook&utm_medium=banner&utm_campaign=MONK&gclid1234", header=TRUE, stringsAsFactors=FALSE)

使用strsplit分隔每個源字符串? ：

z <- matrix(
  unlist(strsplit(gsub(".*\\?", "", x$Source), "\\&")), 
  ncol=4, byrow=TRUE)
cbind(x$UUID, gsub(".*=", "", z))

     [,1]      [,2]         [,3]     [,4]   [,5]       
[1,] "Jane"    "ADW"        "banner" "Monk" "gclid1234"
[2,] "Mike"    "Google"     "cpc"    "DOG"  "gclid1234"
[3,] "John"    "Yahoo"      "banner" "DOG"  "gclid1234"
[4,] "Sarah"   "Facebookdw" "cpc"    "CAT"  "gclid1234"
[5,] "Michael" "Twitter"    "GDNr"   "CAT"  "gclid1234"
[6,] "Bob"     "ADW"        "GDN"    "DOG"  "gclid1234"
[7,] "Mark"    "Twitter"    "banner" "MONK" "gclid1234"
[8,] "Anna"    "Facebook"   "banner" "MONK" "gclid1234"

---

然后轉換為數據框並添加名稱：

z <- matrix(
  unlist(strsplit(gsub(".*\\?", "", x$Source), "\\&")), 
  ncol=4, byrow=TRUE)
z <- cbind(x$UUID, gsub(".*=", "", z))
z <- as.data.frame(z[, -5])
names(z) <- c("UUID", "UTM_SOURCE", "UTM_MEDIUM", "UTM_CAMPAIGN")
z

     UUID UTM_SOURCE UTM_MEDIUM UTM_CAMPAIGN
1    Jane        ADW     banner         Monk
2    Mike     Google        cpc          DOG
3    John      Yahoo     banner          DOG
4   Sarah Facebookdw        cpc          CAT
5 Michael    Twitter       GDNr          CAT
6     Bob        ADW        GDN          DOG
7    Mark    Twitter     banner         MONK
8    Anna   Facebook     banner         MONK

Answer 2

我就是這樣做的

> file1 <- read.csv("C:/Users/Dumitru Ostaciu/Desktop/Users.csv")
> file1 <- transform(file1, Source = as.character(Source))
> z <- matrix(
     unlist(strsplit(gsub(".*\\?", "", file1$Source), "\\&")), 
     ncol=4, byrow=TRUE)
> file2 <- cbind(file1$UUID, gsub(".*=", "", z))

這是我得到的結果

    V1  V2          V3      V4      V5
1   3   ADW         banner  Monk    gclid1234
2   7   Google      cpc     DOG     gclid1234
3   4   Yahoo       banner  DOG     gclid1234
4   8   Facebookdw  cpc     CAT     gclid1234
5   6   Twitter     GDNr    CAT     gclid1234
6   2   ADW         GDN     DOG     gclid1234
7   5   Twitter     banner  MONK    gclid1234
8   1   Facebook    banner  MONK    gclid1234

我需要指出，我的真實數據將有500.000行，在第一列中將有一個唯一的名稱。

如何修復此問題以使名稱顯示在V1中？ 我的錯是什么？