如何在R中的列表内添加数据框?
列表可能包含许多对象,例如矢量,矩阵,数据框,列表等。通过这种方式,我们可以同时访问所有必需的对象。如果要在列表中添加数据框,则可以使用列表的长度。例如,如果我们有一个定义为List的列表,并且想要向列表中添加数据帧df,则可以按以下方式添加它:
List[[length(List)+1]]<−df
例1
df1<−data.frame(x=rnorm(20,1,0.004))df1
输出结果
x1 1.0103338
2 0.9959405
3 1.0018717
4 1.0056090
5 1.0014642
6 1.0042043
7 0.9939947
8 1.0021608
9 0.9993048
10 0.9972184
11 0.9912667
12 0.9964343
13 0.9979993
14 0.9935636
15 0.9990263
16 1.0002390
17 1.0004094
18 1.0034078
19 1.0044146
20 1.0026450
List1<−list(letters[1:26])
List1
[[1]]
[1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o" "p" "q" "r" "s"
[20] "t" "u" "v" "w" "x" "y" "z"
在List1内添加df1-
List1[[length(List1)+1]]<−df1List1
输出结果
[[1]][1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o" "p" "q" "r" "s"
[20] "t" "u" "v" "w" "x" "y" "z"
[[2]]
x
1 1.0103338
2 0.9959405
3 1.0018717
4 1.0056090
5 1.0014642
6 1.0042043
7 0.9939947
8 1.0021608
9 0.9993048
10 0.9972184
11 0.9912667
12 0.9964343
13 0.9979993
14 0.9935636
15 0.9990263
16 1.0002390
17 1.0004094
18 1.0034078
19 1.0044146
20 1.0026450
例2
df2<−data.frame(x=rpois(20,4))df2
输出结果
x1 1
2 2
3 5
4 3
5 9
6 5
7 4
8 5
9 5
10 5
11 6
12 4
13 5
14 1
15 2
16 5
17 5
18 3
19 4
20 6
List2<−list(sample(0:9,50,replace=TRUE))
List2
[[1]]
[1] 1 4 2 2 7 4 2 7 2 1 2 6 3 0 5 1 9 6 2 3 8 2 9 0 8 5 2 2 3 8 3 6 8 5 5 5 6 9
[39] 3 6 4 9 0 2 0 8 0 9 7 2
在List2内添加df2-
List2[[length(List2)+1]]<−df2List2
输出结果
[[1]][1] 1 4 2 2 7 4 2 7 2 1 2 6 3 0 5 1 9 6 2 3 8 2 9 0 8 5 2 2 3 8 3 6 8 5 5 5 6 9
[39] 3 6 4 9 0 2 0 8 0 9 7 2
[[2]]
x
1 1
2 2
3 5
4 3
5 9
6 5
7 4
8 5
9 5
10 5
11 6
12 4
13 5
14 1
15 2
16 5
17 5
18 3
19 4
20 6
以上是 如何在R中的列表内添加数据框? 的全部内容, 来源链接: utcz.com/z/338032.html