Today, we will learn how to use the names Function in R together. If you are interested in this topic, please read this article to the end, as it will help you get a lot of helpful information.
What is names() function in R?
We can use the names() function to get or set the name of an object in R. This function takes an object, e.g., matrix, data frame, vector, as an argument with the value assigned as a name to the object.
Syntax:
# Get the names of the object names(obj) # Set the names of the object names(obj) <- val
Parameters:
obj:The object in R, e.g., matrix, data frame, vector, …val:The value is assigned to the obj.
How to use the names function in R?
Example 1: Using names function with vector
Here, we will build a program using the names function with vectors. See the code below to understand better.
# Create a vector
myVector <- c(15, 30, 65, 48)
# Set the names for vector
names(myVector) <- c('Ozella Hoppe', 'Markus Bins', 'Sincere Lakin', 'Kamryn Frami')
# Print names vector, which is assigned
print("The names of vector: ")
names(myVector)
# Print updated vector
print('The updated vector:')
myVectorOutput
[1] "The names of vector: "
[1] "Ozella Hoppe" "Markus Bins" "Sincere Lakin" "Kamryn Frami"
[1] "The updated vector:"
Ozella Hoppe Markus Bins Sincere Lakin Kamryn Frami
15 30 65 48Example 2: Using names function with data frame
We will use the names() function to get and set the names for the columns of a data frame:
# Create a data frame
dataFrame <- data.frame(A = c('Ozella Hoppe', 'Markus Bins',
'Sincere Lakin', 'Kamryn Frami'),
B = c(9, 5, 6, 8),
C = c(6, 8, 9, 10),
D= c(8, 6, 9, 4))
# Set the names for a data frame
names(dataFrame) <- c('names', 'math', 'physic', 'chemistry')
# Print names data frame, which is assigned
print("The names of data frame: ")
names(dataFrame)
# Print updated data frame
print("The updated data frame:")
dataFrameOutput
[1] "The names of a data frame:
[1] "names" "math" "physic" "chemistry"
[1] "The updated data frame:"
names math physic chemistry
1 Ozella Hoppe 9 6 8
2 Markus Bins 5 8 6
3 Sincere Lakin 6 9 9
4 Kamryn Frami 8 10 4Example 3: Using the names function with a list
The program example for getting the name of a list.
# Create a list
myList <- list(c(9, 6, 2), 'LearnShareIT', 20, 'ABC')
# Set the names for a list
names(myList) <- c("Ozella Hoppe", "Markus Bins", "Sincere Lakin", "Kamryn Frami")
# Print names list, which is assigned
print("The names of a list: ")
names(myList)
# Print updated list
print('The updated list:')
myListOutput
[1] "The names of a list: "
[1] "Ozella Hoppe" "Markus Bins" "Sincere Lakin" "Kamryn Frami"
[1] "The updated list:"
$`Ozella Hoppe`
[1] 9 6 2
$`Markus Bins`
[1] "LearnShareIT"
$`Sincere Lakin`
[1] 20
$`Kamryn Frami`
[1] "ABC"Summary
As we said, this article has brought you a lot of useful knowledge about names in R, right? If you have any questions, please leave a comment below. And finally, have a nice day!
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