How To Add A Data Frame Inside A List In R? - Tutorialspoint

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How to add a data frame inside a list in R? R ProgrammingServer Side ProgrammingProgramming

A list may contain many objects such as vector, matrix, data frame, list etc. In this way, we can have access to all the necessary objects at the same time. If we want to add a data frame inside a list then we can use the length of the list. For example, if we have a list defined as List and we want to add a data frame df to the List then it can be added as follows −

List[[length(List)+1]]<−df

Example1

df1<−data.frame(x=rnorm(20,1,0.004)) df1

Output

   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 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"

Adding df1 inside List1 −

List1[[length(List1)+1]]<−df1 List1

Output

[[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

Example2

df2<−data.frame(x=rpois(20,4)) df2

Output

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 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

Adding df2 inside List2 −

List2[[length(List2)+1]]<−df2 List2

Output

[[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 Nizamuddin Siddiqui Updated on: 2020-11-07T11:48:56+05:30

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