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Append Operation on Vectors in R Programming

  • Last Updated : 11 Jun, 2021

Vectors in R programming is a basic object consisting sequence of homogeneous elements. It can be integer, logical, double, character, complex or raw. In this article, let us discuss different methods to concatenate/append values to a vector in R programming. Values can be appended/concatenated in a vector using 2 methods: 
 

  • c() function
  • append() function

 

Append operation using c() function

c() function is a generic function that combines data into a vector or a list.
 

Syntax: c(…)
Parameters: 
…: represents objects to be concatenated 
 

To know about more optional parameters, use below command in console: 
 



help("c")

Example 1: 
 

r




# Create a vector
x <- 1:5
n <- 6:10
 
# Append using c() function
y <- c(x, n)
 
# Print resultant vector
print(y)

Output: 
 

 [1]  1  2  3  4  5  6  7  8  9 10

Example 2: 
 

r




# Create vector
x <- 1:5
n <- letters[1:5]
 
# Append
y <- c(x, n)
 
# Print resultant vector
print(y)
 
# Print type of resultant vector
typeof(y)
 
# Print type of other vectors
typeof(x)
typeof(n)

Output: 
 

[1] "1" "2" "3" "4" "5" "a" "b" "c" "d" "e"
[1] "character"
[1] "integer"
[1] "character"

 

Append operation using append() function

append() function in R is used for merging vectors or adding more elements to a vector.
 



Syntax: append(x, values)
Parameters: 
x: represents a vector to which values has to be appended to 
values: represents the values which has to be appended in the vector 
 

Example 1: 
 

r




# Create a vector
x <- 1:5
 
# Append using append() function
x <- append(x, 6:10)
 
# Print resultant vector
print(x)

Output: 
 

[1]  1  2  3  4  5  6  7  8  9 10

Example 2: 
 

r




# Create a vector
x <- 1:5
y <- letters[1:5]
 
# Append using append() function
x <- append(x, values = y)
 
# Print resultant vector
print(x)

Output: 
 

[1] "1" "2" "3" "4" "5" "a" "b" "c" "d" "e"

 




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