如何为 R 数据框列中的字符串添加单引号？

2024-05-21 06:40:06 175

要将单引号添加到R数据框列中的字符串，我们可以使用paste0函数。这将覆盖两侧带有单引号的字符串，但我们可以将它们添加到初始位置或仅添加到最后位置。

要在两侧添加它们，我们可以使用以下语法-

Data_frame$Column<-paste0("'", Data_frame$Column,"'")

示例1

以下代码段创建了一个示例数据框-

x<-LETTERS[1:20]
df1<-data.frame(x)
df1

输出结果

创建以下数据框-

   x
1  A
2  B
3  C
4  D
5  E
6  F
7  G
8  H
9  I
10 J
11 K
12 L
13 M
14 N
15 O
16 P
17 Q
18 R
19 S
20 T

要在x中每个值的两侧添加单引号，请将以下代码添加到上面的代码段中-

x<-LETTERS[1:20]
df1<-data.frame(x)
df1$x<-paste0("'",df1$x,"'")
df1

输出结果

如果您将上述所有代码作为单个程序执行，它会生成以下输出-

    x
1  'A'
2  'B'
3  'C'
4  'D'
5  'E'
6  'F'
7  'G'
8  'H'
9  'I'
10 'J'
11 'K'
12 'L'
13 'M'
14 'N'
15 'O'
16 'P'
17 'Q'
18 'R'
19 'S'
20 'T'

示例2

以下代码段创建了一个示例数据框-

States_20<-c("Alabama", "Alaska", "American Samoa", "Arizona", "Arkansas", "California", "Colorado", "Connecticut", "Delaware", "District of Columbia", "Florida", "Georgia", "Guam", "Hawaii", "Idaho", "Illinois", "Indiana", "Iowa", "Kansas", "Kentucky")
df2<-data.frame(States_20)
df2

输出结果

创建以下数据框-

   States_20
1  Alabama
2  Alaska
3  American Samoa
4  Arizona
5  Arkansas
6  California
7  Colorado
8  Connecticut
9  Delaware
10 District of Columbia
11 Florida
12 Georgia
13 Guam
14 Hawaii
15 Idaho
16 Illinois
17 Indiana
18 Iowa
19 Kansas
20 Kentucky

要在States_20中每个值的两侧添加单引号，请将以下代码添加到上面的代码段中-

States_20<-c("Alabama", "Alaska", "American Samoa", "Arizona", "Arkansas", "California", "Colorado", "Connecticut", "Delaware", "District of Columbia", "Florida", "Georgia", "Guam", "Hawaii", "Idaho", "Illinois", "Indiana", "Iowa", "Kansas", "Kentucky")
df2<-data.frame(States_20)
df2$States_20<-paste0("'",df2$States_20,"'")
df2

输出结果

如果您将上述所有代码作为单个程序执行，它会生成以下输出-

   States_20
1  'Alabama'
2  'Alaska'
3  'American Samoa'
4  'Arizona'
5  'Arkansas'
6  'California'
7  'Colorado'
8  'Connecticut'
9  'Delaware'
10 'District of Columbia'
11 'Florida'
12 'Georgia'
13 'Guam'
14 'Hawaii'
15 'Idaho'
16 'Illinois'
17 'Indiana'
18 'Iowa'
19 'Kansas'
20 'Kentucky'

示例3

以下代码段创建了一个示例数据框-

States_Abb_20<-c("AK", "AL", "AR", "AS", "AZ", "CA", "CO", "CT", "DC", "DE", "FL", "GA", "GU", "HI", "IA", "ID", "IL", "IN", "KS", "KY")
df3<-data.frame(States_Abb_20)
df3

输出结果

创建以下数据框-

  States_Abb_20
1  AK
2  AL
3  AR
4  AS
5  AZ
6  CA
7  CO
8  CT
9  DC
10 DE
11 FL
12 GA
13 GU
14 HI
15 IA
16 ID
17 IL
18 IN
19 KS
20 KY

要在States_Abb_20中每个值的两侧添加单引号，请将以下代码添加到上述代码段中-

States_Abb_20<-c("AK", "AL", "AR", "AS", "AZ", "CA", "CO", "CT", "DC", "DE", "FL", "GA", "GU", "HI", "IA", "ID", "IL", "IN", "KS", "KY")
df3<-data.frame(States_Abb_20)
df3$States_Abb_20<-paste0("'",df3$States_Abb_20,"'")
df3

输出结果

如果您将上述所有代码作为单个程序执行，它会生成以下输出-

  States_Abb_20
1  'AK'
2  'AL'
3  'AR'
4  'AS'
5  'AZ'
6  'CA'
7  'CO'
8  'CT'
9  'DC'
10 'DE'
11 'FL'
12 'GA'
13 'GU'
14 'HI'
15 'IA'
16 'ID'
17 'IL'
18 'IN'
19 'KS'
20 'KY'

如何为 R 数据框列中的字符串添加单引号？

示例1

示例2

示例3

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