In this article, we will discuss how to remove specific elements from vectors in R Programming Language.
Remove elements using in operator
This operator will select specific elements and uses ! operator to exclude those elements.
Syntax:
vector[! vector %in% c(elements)]In this example, we will be using the in operator to remove the elements in the given vector in the R programming language.
# create a vector
vector1=c(1,34,56,2,45,67,89,22,21,38)
# display
print(vector1)
# remove the elements
print(vector1[! vector1%in% c(34,45,67)])
Output:
[1] 1 34 56 2 45 67 89 22 21 38
[1] 1 56 2 89 22 21 38Note: We can also specify the range of elements to be removed.
Syntax:
vector[! vector %in% c(start:stop)]# create a vector
vector1 = c(1, 34, 56, 2, 45, 67, 89, 22, 21, 38)
# display
print(vector1)
# remove the elements
print(vector1[! vector1 %in% c(1:50)])
Output:
[1] 1 34 56 2 45 67 89 22 21 38
[1] 56 67 89Using conditions to remove the elements
In this method, the user needs to use the specific conditions accordingly to remove the elements from a given vector.
Syntax:
vector[!condition]where
condition: specifies the condition that element be checked
# create a vector
vector1=c(1,34,56,2,45,67,89,22,21,38)
# display
print(vector1)
# remove the elements with element greater
# than 50 or less than 20
print(vector1[!(vector1 > 50 | vector1 < 20)])
Output:
[1] 1 34 56 2 45 67 89 22 21 38
[1] 34 45 22 21 38Remove element from vector by index
To remove elements from a vector by index in R, we can use negative indexing or the subsetting technique. Here's an example.
# Create a vector
vector1 <- c(1, 34, 56, 2, 45, 67, 89, 22, 21, 38)
# Display the original vector
print("Original Vector:")
print(vector1)
# Remove elements by index
vector1 <- vector1[-c(3,5)]
# Display the modified vector
print("Modified Vector:")
print(vector1)
Output:
[1] "Original Vector:"
[1] 1 34 56 2 45 67 89 22 21 38[1] "Modified Vector:"
[1] 1 34 2 67 89 22 21 38