How to Remove Specific Elements from Vector in R?

Last Updated : 11 Mar, 2024

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.

R

 `# 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 38```

Note: We can also specify the range of elements to be removed.

Syntax:

`vector[! vector %in% c(start:stop)]`

R

 `# 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 89```

Using 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

R

 `# 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 38```

Remove 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.

R

 `# 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`

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