Apply a Function over a List of elements in R Programming - lapply() Function

lapply() function in R Programming Language is used to apply a function over a list of elements. 

lapply() function is used with a list and performs the following operations:

lapply(List, length): Returns the length of objects present in the list, List.
lapply(List, sum): Returns the sum of elements held by objects in the list, List.
lapply(List, mean): Returns the mean of elements held by objects in the list, List.
lapply(List, cumsum): Returns the cumulative sum of elements held by objects present inside the list, List.

Syntax: lapply(list, func)

Parameters: 

• list: list of elements

 R - Apply a Function over a List of elements

Example 1: Basic example of lapply() Function in R programming

Output: 

[[1]]
[1] 0

[[2]]
[1] 5.329071e-15

Example 2: Apply a Function over a List of elements in R

Output: 

 [, 1] [, 2] [, 3]
[1, ] 1 4 7
[2, ] 2 5 8
[3, ] 3 6 9
[1] 28 80 162
[1] 6 120 504