如何在 R 数据框中创建两个因子列的表？

2024-05-21 06:03:07 409

要在R数据框中创建包含两个因子列的表，我们可以使用table函数和with函数。

例如，如果我们有一个名为df的数据框，其中包含两个因子列，比如F1和F2，那么我们可以使用以下命令创建这两列的表-

with(df,table(F1,F2))

示例1

以下代码段创建了一个示例数据框-

Group<-sample(c("G1","G2","G3"),20,replace=TRUE)
Class<-sample(c("First","Second","Third"),20,replace=TRUE)
df1<-data.frame(Group,Class)
df1

创建了以下数据框

Group Class
1  G1 First
2  G2 First
3  G3 First
4  G2 First
5  G1 Second
6  G2 Second
7  G3 Second
8  G3 Third
9  G2 First
10 G1 Third
11 G1 Second
12 G3 Second
13 G1 Second
14 G1 Third
15 G2 Second
16 G1 Second
17 G3 Third
18 G1 Second
19 G3 First
20 G1 Third

要在上面创建的数据框中创建列Group和Class的表，请将以下代码添加到上面的代码段中-

Group<-sample(c("G1","G2","G3"),20,replace=TRUE)
Class<-sample(c("First","Second","Third"),20,replace=TRUE)
df1<-data.frame(Group,Class)
with(df1,table(Group,Class))

输出结果

如果您将上述所有给定的片段作为单个程序执行，它会生成以下输出-

Class
Group First Second Third
  G1   1     5      3
  G2   3     2      0
  G3   2     2      2

示例2

以下代码段创建了一个示例数据框-

Gender<-sample(c("Male","Female"),20,replace=TRUE)
Sal_Group<-sample(c("<=10K","10K and <=20K","=20K"),20,replace=TRUE)
df2<-data.frame(Gender,Sal_Group)
df2

创建了以下数据框

 Gender      Sal_Group
1  Male            =20K
2  Male           <=10K
3  Female         <=10K
4  Male   10K and <=20K
5  Male           <=10K
6  Female         <=10K
7  Female 10K and <=20K
8  Female 10K and <=20K
9  Female          =20K
10 Male            =20K
11 Female 10K and <=20K
12 Male           <=10K
13 Male            =20K
14 Male            =20K
15 Female 10K and <=20K
16 Male   10K and <=20K
17 Female         <=10K
18 Female         <=10K
19 Male            =20K
20 Female 10K and <=20K

要在上面创建的数据框中创建列Gender和Sal_Group的表，请将以下代码添加到上面的代码段中-

Gender<-sample(c("Male","Female"),20,replace=TRUE)
Sal_Group<-sample(c("<=10K","10K and <=20K","=20K"),20,replace=TRUE)
df2<-data.frame(Gender,Sal_Group)
with(df2,table(Gender,Sal_Group))

输出结果

如果您将上述所有给定的片段作为单个程序执行，它会生成以下输出-

       Sal_Group
Gender <=10K  =20K  10K and <=20K
Female    4     1       5
Male      3     5       2

示例3

以下代码段创建了一个示例数据框-

Category<-sample(c("C1","C2","C3","C4"),20,replace=TRUE)
Sample<-sample(1:4,20,replace=TRUE)
df3<-data.frame(Category,Sample)
df3

创建了以下数据框

Category Sample
1  C4    4
2  C2    3
3  C2    3
4  C1    3
5  C3    4
6  C1    4
7  C2    1
8  C1    1
9  C1    1
10 C1    2
11 C4    3
12 C1    3
13 C4    2
14 C1    3
15 C4    2
16 C3    4
17 C1    3
18 C2    4
19 C1    2
20 C1    2

要在上面创建的数据框中创建列Category和Sample的表，请将以下代码添加到上面的代码段中-

Category<-sample(c("C1","C2","C3","C4"),20,replace=TRUE)
Sample<-sample(1:4,20,replace=TRUE)
df3<-data.frame(Category,Sample)
with(df3,table(Category,Sample))

输出结果

如果您将上述所有给定的片段作为单个程序执行，它会生成以下输出-

     Sample
Category 1 2 3 4
      C1 2 3 4 1
      C2 1 0 2 1
      C3 0 0 0 2
      C4 0 2 1 1

如何在 R 数据框中创建两个因子列的表？

示例1

示例2

示例3

热门推荐

随机推荐