OR in R: How to Use OR Operator in R

Logical operators carry out Boolean operations like AND, OR, NOT, etc. The logical operators can operate on raw, logical, and number-like vectors. Moreover, logical operators allow us to change or compare the results. There are various types of operators available in R, and logical is one of them; we will talk about the OR operator.

OR in R

The OR is a built-in R logical operator that returns TRUE if one of the conditions is TRUE. If both conditions are FALSE, then it will return FALSE.

This means that TRUE | TRUE equals TRUE, but TRUE | FALSE and FALSE | TRUE return to TRUE. Thus, when both logicals are FALSE, the result is FALSE, unlike the exclusive-OR operation in which it returns TRUE.

Remember that the OR operation is not an exclusive or operation, so TRUE | TRUE equals TRUE.

The difference between AND and OR operator is that the AND operator, only TRUE & TRUE, makes a TRUE; anything else is FALSE. Likewise, by using the OR operator, only FALSE | FALSE makes a FALSE; anything else is TRUE.

Syntax

x | y

Return Value

It returns TRUE if x or y is TRUE.

Example

Let’s define two logical vectors, which means they will contain logical values.

x <- c(TRUE, FALSE, 0, FALSE)
y <- c(FALSE, TRUE, 1, 0)

The OR operator( | ) performs an element-wise operation on the vectors. Let’s use OR operator and see the output.

x <- c(TRUE, FALSE, 0, FALSE)
y <- c(FALSE, TRUE, 1, 0)

x | y

Output

[1] TRUE TRUE TRUE FALSE

The first three elements return TRUE because one of them is TRUE or 1. In the last element of both vectors, the values are FALSE, or 0, and both are FALSE. So, it returns FALSE.

Example 2

Let’s define a variable k, assign the value 19 and then check the value using the OR operator.

k <- 19
k < 21 | k > 10

Output

[1] TRUE

Logical Operators in R

Operator Description
!x Not x
x | y element-wise OR
x | | y Logical OR
x & y element-wise AND
x && y Logical AND
isTRUE(x) It tests if X is TRUE

Operators & and | perform the element-wise operation, producing results having a length of the more extended operand. But && and || examine only the first element of the operands resulting in a single logical vector. Therefore, zero is considered FALSE, and non-zero numbers are taken as TRUE.

AND Operator in R

The AND operator in R is a built-in operator that takes two logical values and returns TRUE only if both values are TRUE themselves.

TRUE & TRUE
TRUE & FALSE
FALSE & TRUE
FALSE & FALSE

Output

[1] TRUE
[1] FALSE
[1] FALSE
[1] FALSE

You can see that it returns TRUE if both values are TRUE; otherwise, it returns FALSE.

You are not limited to using logical value with & operator. You can use the results of comparisons. For example, let’s say we have a variable equal to 11. To check if this variable is greater than 10 but less than 21, we can use “a” greater than 10 and a less than 21.

x <- 11
11 > 10 & 11 < 21

Output

[1] TRUE

Final words

The OR in R returns TRUE if one of the conditions is TRUE. If both conditions are FALSE, then it will return FALSE. That is it for the OR operator in R.

Related posts

Operators in R

Not equal to in R

Not in R

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