Creating a List
To create a List in R you need to use the function called “list()“.
In other words, a list is a generic vector containing other objects. To illustrate how a list looks, we take an example here. We want to build a list of employees with the details. So for this, we want attributes such as ID, employee name, and the number of employees.
Example:
R
# R program to create a List # The first attributes is a numeric vector # containing the employee IDs which is created # using the command hereempId = c(1, 2, 3, 4) # The second attribute is the employee name # which is created using this line of code here# which is the character vector empName = c("Debi", "Sandeep", "Subham", "Shiba") # The third attribute is the number of employees# which is a single numeric variable.numberOfEmp = 4 # We can combine all these three different# data types into a list# containing the details of employees# which can be done using a list commandempList = list(empId, empName, numberOfEmp) print(empList) |
[[1]] [1] 1 2 3 4 [[2]] [1] "Debi" "Sandeep" "Subham" "Shiba" [[3]] [1] 4
R – Lists
A list in R programming is a generic object consisting of an ordered collection of objects. Lists are one-dimensional, heterogeneous data structures.
The list can be a list of vectors, a list of matrices, a list of characters, a list of functions, and so on.
A list is a vector but with heterogeneous data elements. A list in R is created with the use of the list() function.
R allows accessing elements of an R list with the use of the index value. In R, the indexing of a list starts with 1 instead of 0.
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