You can use the following syntax to append a single value to a list in R:
#get length of list called my_list
len
#append value of 12 to end of list
my_list[[len+1]]
And you can use the following syntax to append multiple values to a list in R:
#get length of list called my_list len #define values to append to list new #append values to list i = 1 while(i
The following examples show how to use each of these functions in practice.
Example 1: Append a Single Value to a List
Suppose we have the following list in R:
#create list
my_list #view list
my_list
[[1]]
[1] 7
[[2]]
[1] 14
[[3]]
[1] 1 2 3
We can use the following syntax to append the value 12 to the end of the list:
#get length of list
len #append value to end of list
my_list[[len+1]] #view list
my_list
[[1]]
[1] 7
[[2]]
[1] 14
[[3]]
[1] 1 2 3
[[4]]
[1] 12
Example 2: Append Multiple Values to a List
Suppose we have the following list in R:
#create list
my_list #view list
my_list
[[1]]
[1] 7
[[2]]
[1] 14
[[3]]
[1] 1 2 3
We can use the following syntax to append several values to the end of the list:
#get length of list len #define values to append to list new #append values to list i = 1 while(i #display updated list my_list [[1]] [1] 7 [[2]] [1] 14 [[3]] [1] 1 2 3 [[4]] [1] 3 [[5]] [1] 5 [[6]] [1] 12 [[7]] [1] 14
Additional Resources
How to Append Values to a Vector in R
How to Append Rows to a Data Frame in R